Swiftech MCP 35X

Cool ;-) now time to go and give all my rads a wash

why is everyone having such a big hard-on for the mcp355? I like my 655 with custom ek top just fine! :P

Quote:

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Originally Posted by MagisD

As far I know as long as its just the control wire your fine spliceing it in. Need seperate power and can only read one rpm but works with pwm fans.

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http://www.akasa.com.tw/img/product/...-CB002_f00.png

Affirmative.

Here's a PWM splitter from Akasa and I've been sharing PWM signal with my AC F10 fans.

http://www.akasa.com.tw/update.php?t...model=AK-CB002

Phil

Quote:

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Originally Posted by antiacid

why is everyone having such a big hard-on for the mcp355? I like my 655 with custom ek top just fine! :P

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They are just very well tuned for water cooling and high restriction. In the operating range, the DDC3.25 produces around 30% more pressure than a D5, and its about half the size. To top it off, it consumes and dumps less heat into the loop.

The D5 still has the reliability crown and plenty of pump, but when splitting hairs as we normally do in water cooling...the DDC is tuned slightly better, especially after adding tops.
http://www.swiftnets.com/assets/imag...l-1200x870.png

Someone would have to create an aftermarket impeller to really make the D5 motor work substantially better than it comes in stock form.

The D5 is a good pump though, I've had up to three in a single system(I still have one), I just don't like the bulk and have slowly migrated to the DDC side.

Yes but when the build requires something that looks like a cannon ... ya gota go D5

Just an FYI... the Gigabyte UD7 has two PWM headers and the Asus Rampage III Extreme has 7. In case anyone was wondering. :)

I thought R3E had like 5 or 6 PWM headers :lol:

Actually, you're spot on... there are 7, every fan header on the board is PWM.

Quote:

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Originally Posted by jayhall0315

Jeff - There are many guys here at XS who run that MCP 355 and claim great results. I, on the other hand have owned 5 of the higher powered DDC 3.2 18w or MCP 3.25 18W pumps and 3 out of 5 have failed. After finally tracing the circuit board last week, I consider the design flawed. The reason on the 355 and 3.25 is that there are two cheap capacitors (from Lin Wuan in China I believe) that are easily effected by either water leaking in from the top, or the strength of the magnetic field generated by the coils. Simply put, on the less expensive MCP 350 (which has a much safer reliability record over many tens of thousands of owners), the strength of the magnetic field, along with the lower current, mean that the cheap Chinese caps dont operate near their limits, as they do on the MCP 355 and MCP 3.25. And in turn, that means, your chance for a melt down, LOL (well, you have seen it, ....literally, ... so you know I am not $hitting you) is much less. The 355s and the 3.25s need to be re-engineered so the space between the PCB and the coil is about 19 mm (this is a result of the Maxwell derivative for field strength affecting charge), and the $hitty Chinese caps need to be upgraded to decent higher charge Japanese caps.

You need to talk to Debbie at Danger Den to get an RMA, and when you do, ask for a MCP 350 replacement.

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Gabe, what are your thoughts about this? Have you taken this into consideration when designing MCP 35X?

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Originally Posted by Erklat

Gabe, what are your thoughts about this? Have you taken this into consideration when designing MCP 35X?

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Gabe does not have anything to do with the design, that is all on Laing.

Quote:

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Originally Posted by Waterlogged

Gabe does not have anything to do with the design, that is all on Laing.

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Yet, maybe he cares to share his insight here.
When I asked if this pump was closer to either MCP 355 or DDC 3.25, he said
p/n is MCP 35X. :D

Induction leads me to believe that perhaps similar design flaws have been taken
into account then.:shrug:

If so, and this pump has increased reliability over DDC3.25 - but not due to PWM control and lower rpm due to it - I shall
repent for mine top trashing :p: :D

Quote:

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Originally Posted by Erklat

Yet, maybe he cares to share his insight here.
When I asked if this pump was closer to either MCP 355 or DDC 3.25, he said
p/n is MCP 35X. :D

Induction leads me to believe that perhaps similar design flaws have been taken
into account then.:shrug:

If so, and this pump has increased reliability over DDC3.25 - but not due to PWM control and lower rpm due to it - I shall
repent for mine top trashing :p: :D

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Well, the 3.1 and 3.2 shared the exact same PCB when they came out, the only difference was a blob of solder. The 3.1 now shares the same PCB as the 3.25, the only difference is the programming on the control chip. If I had to guess, I'd say the difference between the PWM and the 3.1/3.15/3.25 is the programming on the chip.

Please understand that I wish to gather as much info on the pumps reliability as possible.
There are couple of reasons for that. Eg., I leave my premises for a week or two and leave PC turned on crunching.
Burnt plastic in that case is a nasty thing to happen. More importantly, if I import the pump from the
States, the shipping costs back would be massive. And I mean MASSIVE! Probably somewhere near
the point where you can state with utmost certainty that buying a new pump is a sane thing to do...

Luckily I have always liked EK tops over XSPC's :D

I asked Stephen not to go surfing today, and do some pump top testing instead. He wasn't too happy, as there was some nice swell this morning; "too bad dude, business first I said".

The minute he got busy testing I sneaked out of the office to go check out the surf for myself. Ahh, it's good to be a boss :D

J/K of course, as other than the internet, we don't surf at Swiftech.

So here are our pump top test results. I'm sure Skinnee will do some of his own too very soon.

Gabe: can you confirm or deny, if this PWM splitter can be used to power two 35X pumps from one motherboard PWM fan connector? From the looks of it it draws actual power directly from PSU 4pin molex, and just reports rpm tach to motherboard / gets pwm regulation from it ..

Quote:

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Originally Posted by gabe

I asked Stephen not to go surfing today, and do some pump top testing instead. He wasn't too happy, as there was some nice swell this morning; "too bad dude, business first I said".

The minute he got busy testing I sneaked out of the office to go check out the surf for myself. Ahh, it's good to be a boss :D

J/K of course, as other than the internet, we don't surf at Swiftech.

So here are our pump top test results. I'm sure Skinnee will do some of his own too very soon.

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Wow, that's impressive...great work!!:clap::up:

Quote:

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Originally Posted by churchy

Gabe: can you confirm or deny, if this PWM splitter can be used to power two 35X pumps from one motherboard PWM fan connector? From the looks of it it draws actual power directly from PSU 4pin molex, and just reports rpm tach to motherboard / gets pwm regulation from it ..

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It should work, however we haven't had the chance to test it yet.

Quote:

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Originally Posted by Martinm210

Wow, that's impressive...great work!!:clap::up:

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Yep. Convincing him not to go surfing was a real challenge :D

Really Nice results and of the big 2-3 tops and really your not gonna see a difference at under 2 lpm and besides I actually like the Look of the top, smoothly angular if that makes sense. Not just a block. reminds me of Stealth planes for some reason.

But I'm serious tweaked at the cost of getting a 1/4" BSP 19 TPI tap and 11.8mm Drill Bit in Toronto/Canada apparently 1 place sells em ... for $50 plus shipping. The bit I haven't even found , so in the end $120 to tap 2 holes in the lids of those Res's. I might just chuck em and use the koolance res's I have coming instead of rma'ing it . I lose direct attach but I'm close to my limit on this build I Double bought Pumps don't ya know :ROTF:

Gabe seriously consider that for the next batch of res tops. Then I can just wait and buy those to install my fill lines.

Quote:

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Originally Posted by MagisD

Really Nice results and of the big 2-3 tops and really your not gonna see a difference at under 2 lpm and besides I actually like the Look of the top, smoothly angular if that makes sense. Not just a block. reminds me of Stealth planes for some reason.

But I'm serious tweaked at the cost of getting a 1/4" BSP 19 TPI tap and 11.8mm Drill Bit in Toronto/Canada apparently 1 place sells em ... for $50 plus shipping. The bit I haven't even found , so in the end $120 to tap 2 holes in the lids of those Res's. I might just chuck em and use the koolance res's I have coming instead of rma'ing it . I lose direct attach but I'm close to my limit on this build I Double bought Pumps don't ya know :ROTF:

Gabe seriously consider that for the next batch of res tops. Then I can just wait and buy those to install my fill lines.

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Already spoke to Stephen about it. It'll be for the next production run.

Quote:

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Originally Posted by MagisD

But I'm serious tweaked at the cost of getting a 1/4" BSP 19 TPI tap and 11.8mm Drill Bit in Toronto/Canada apparently 1 place sells em ... for $50 plus shipping. The bit I haven't even found , so in the end $120 to tap 2 holes in the lids of those Res's.

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Look for a 1/4" NPSM tap, then... requires a 7/16" bit, as I recall.

That would make fine g1/4 holes. ? Thanks

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Quote:

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Originally Posted by MagisD

That would make fine g1/4 holes? Thanks

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There's a 1 TPI difference between 1/4" BSPP and 1/4" NPSM, so the standard is close enough (and the threaded portion of barbs short enough) to where 1/4" BSPP threaded barbs work fine. Swiftech used 1/4" NPSM on a lot of their products and I've never had any problems with 1/4" BSPP fittings not threading in (Swiftech and their o-ring recesses are a different issue).

Quote:

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Originally Posted by gabe

So here are our pump top test results.

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Now we're talking... Gabe, those results are excellent.

Alright guys, I'm about to drop a dime on one of these but before I do can I get some feedback from you all?

I like the fact that it has PWM, but it has to have a 4 pin connection on the mobo right?

I'll be adding this to my current setup of a D5 w/EK top, cpu block, board block, and two gpu blocks, and two PA120's; will I see any improvement over adding a second 655 w/top?

It doesn't have to. You have molex for power and the PWM plug for tach and control.

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Originally Posted by skinnee

It doesn't have to. You have molex for power and the PWM plug for tach and control.

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Thanks, longshot here but is there any software to control the profile? I'd like it to run at 50% until a specific threshold then ramp up to 100 rather quickly. Probably not at the moment.

That depends on either
1. Fan control setting in MB what your hooking it too.
2. Fan control software that works with the PWM header on your motherboard aka Speed fan.

Quote:

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Originally Posted by skinnee

It doesn't have to. You have molex for power and the PWM plug for tach and control.

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Cam, are you going to validate our pump test data or what :stick: ? you need a pump for that heh ? email me to confirm.

@Martin (and others)

Stephen just sent me this:

Calling me out... :p:

Email on the way.

hmmm if my 655 is dying

should i buy new 35x instead of 655?

I have 2 un-opened 655's and i bought 2 of these to bad delivery guy tryed late on friday. .. i had allready left town or i would of did an unboxing.

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Well got them today .. here's the good and the bad and the pics

The good.

Build quality - The pump's Top Notch solid the top smooth and Finished. The pumps a red impeller IF that means anything ;-)

The res is solid I though it was glass when I first unwrapped not Plexiglas or acrylic. The top is a Solid plug of metal Felt and looks like a Spare CPU block .. actually heavier.

The bad.

Res is innovative but Just a little off .

The top is as heavier then pump/res combined I'm afraid to mount the thing. Scared the mount will snap. I can see if it was floor mount it would act as a weight dampener and help prevent vibrations but lets say pump slightly loose at some point this thing will haul it right over if its off balance.

I thought about drilling a fill port in top not going to happen as I would probably need 1000w Drill press.

The Cutaway area for the ports not large enough to use compression fitting ( 3/8-5/8 BP and koolance) or any fitting with a larger lip.

The res mounting mechanism requires you to use a LONG flat screwdriver to reach it and turn but due to the width of the mount port a normal screwdriver can only be on one side I foresee problems there.

The pin for positioning the res in the right spot is nice though.

Here's some pics don't mind the semi bad camera phone and bad lighting.

http://lh6.ggpht.com/_8NbIoxo4dfc/TK...0/DSC_0212.jpg

http://lh6.ggpht.com/_8NbIoxo4dfc/TK...2/DSC_0214.jpg

http://lh5.ggpht.com/_8NbIoxo4dfc/TK...0/DSC_0217.jpg

http://lh4.ggpht.com/_8NbIoxo4dfc/TK...2/DSC_0219.jpg

http://lh6.ggpht.com/_8NbIoxo4dfc/TK...2/DSC_0221.jpg

Let me know if you want pics of anything in particular also have digital calipers on hand is need a measurement although spec are up on swiftech site..

oh nice..i like red :D

Quote:

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Originally Posted by gabe

@Martin (and others)

Stephen just sent me this:

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I can't say enough just how refreshing it is to see products released with real scientific based testing and and comparative performance data.:clap::clap:

Bravo...the way it SHOULD be done with all products...

Congrats to you and Stephen..and cheers to science and engineering..:up:

Quote:

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Originally Posted by MagisD

I thought about drilling a fill port in top not going to happen as I would probably need 1000w Drill press.

The Cutaway area for the ports not large enough to use compression fitting ( 3/8-5/8 BP and koolance) or any fitting with a larger lip.

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both of the above will be corrected in the next production batch:

- top will have an additional G1/4 fitting, and be made out of Delrin (see * note)
- spacing between ports will allow large compression fittings (note how I worded the subject on the web page: "Compression fittings up to 1/2" (tube OD) are currently supported."

*Note: this will reduce weight, and the reduction in material cost should almost offset the extra cost for machining the port + the plug

If you look at the pics its the lip of the cutaway area not only the spaceing.

There needs to be more space around the fitting holes.

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Quote:

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Originally Posted by MagisD

If you look at the pics its the lip of the cutaway area not only the spaceing.

There needs to be more space around the fitting holes.

Sent from my X10a using Tapatalk

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Yes, I know :)

Sorry, just trying to clarify. You never mentioned the cutaway space.

Any eta on next production run ?

That way i can replace them in finalized case.


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Quote:

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Originally Posted by MagisD

Sorry, just trying to clarify. You never mentioned the cutaway space.

Any eta on next production run ?

That way i can replace them in finalized case.


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Yes, we just scheduled another production run. 3~4 weeks I'd say

Now another question , Would the pump work of if mounted vertically with outlet barb up ? I know its not recommended on the edge kits I'm assuming due to Air bleeding. but just the pump itself ?

Quote:

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Originally Posted by MagisD

Now another question , Would the pump work of if mounted vertically with outlet barb up ? I know its not recommended on the edge kits I'm assuming due to Air bleeding. but just the pump itself ?

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I've seen it done on a lot of builds, I ran a D5 like that for a while too. It doesn't prime as well as a top down inlet, but it should work fine.:up:

I think basically anything but inlet down will work if you're careful with priming..

Oh hey guys, just got mine today. Small little bugger, it'll do great for the tight fit I'll need to make with it being a second pump in an 800D.

Cant order the res until tomorrow, but the build wont be finalized until next week anyways. Really wish I could cool the board, but I'm an idiot and thought EK's board blocks would be fine over revisions. Boy am I wrong.

Quote:

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Originally Posted by Martinm210

I've seen it done on a lot of builds, I ran a D5 like that for a while too. It doesn't prime as well as a top down inlet, but it should work fine.:up:

I think basically anything but inlet down will work if you're careful with priming..

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Lol you know this is just adding more and more options/confusion to me about my Loop choices LOL

Quote:

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Originally Posted by mlee49

Oh hey guys, just got mine today. Small little bugger, it'll do great for the tight fit I'll need to make with it being a second pump in an 800D.

Cant order the res until tomorrow, but the build wont be finalized until next week anyways. Really wish I could cool the board, but I'm an idiot and thought EK's board blocks would be fine over revisions. Boy am I wrong.

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Wait .... until Gabe says rev 2 of the res is what you'll get . If you want rev 1's I can sell ya mine ;-)

Any updated release on the new res? Only thing holding me back.

I've got nothing on release dates, but I've finally cracked the riddle of PWM on the UD7 and how the crap I can test the MCP35X. Yeah, I know, not the info you all wanted but progress none the less. :)

Gabe, any update on the new Restop?

Quote:

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Originally Posted by Conumdrum

Gabe, any update on the new Restop?

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I'm at the factory right now. It's not good news. Production run wasn't made to rev2 specs and I rejected all. It means 2 more weeks to rerun the parts, then ship to US = 3 weeks delay from today :( One of these things that should never happen, but unfortunately does from times to times. :mad:

Sorry for the delay.

It would be interesting to see factory pics sometimes with all the equipment that makes stuff for our hobby :)

Quote:

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Originally Posted by gabe

I'm at the factory right now. It's not good news. Production run wasn't made to rev2 specs and I rejected all. It means 2 more weeks to rerun the parts, then ship to US = 3 weeks delay from today :( One of these things that should never happen, but unfortunately does from times to times. :mad:

Sorry for the delay.

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Thanks Gabe, quality before build. Again one reason your a top dude. CYA at the XS party I hope.:up:

I'd assume jabtech and other resellers have the latest/final revisions of the top/reservoir in stock? Does the pump/reservoir combo allow compression fitting size of 1/2'' with OD tubing size of 3/4"" http://www.jab-tech.com/Swiftech-MCP...p-pr-4750.html

No, Gabe has not replied that it's done yet. Will have a delryn top and fit 3/4" OD compression fittings.

So no, we are still waiting.

Will the pump run at 100% if the pwm is not connected to a fan controller/motherbaord?

Quote:

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Originally Posted by Big Myke

Will the pump run at 100% if the pwm is not connected to a fan controller/motherbaord?

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:yepp:

Is only the res getting a revision, or the non-res pump top as well?

Res atm only comes with delerin top.that is the stock top for mcp-35x.

I haven't read anybody different.

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Quote:

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Originally Posted by MagisD

Res atm only comes with delerin top.that is the stock top for mcp-35x.

I haven't read anybody different.

Sent from my X10a using Tapatalk

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Is the delrin top the final revision? I don't need the reservoir so if that is the only thing being updated I can buy the pump and top immediately.

So where can one buy MCP 35X in Europe? I can't find a single shop, not even Swiftech store has these! O.o

Quote:

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Originally Posted by zalbard

So where can one buy MCP 35X in Europe? I can't find a single shop, not even Swiftech store has these! O.o

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Dont do this plz! I promised myself not to upgrade anything for at least 6 months :shakes:

Also looking for European shop, waiting on one of these for new build, any ETA Gabe?

AFAIK, only higflow has it on stock (in Europe) - http://www.highflow.nl/pompen/laing-...p35x-pump.html

Quote:

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Originally Posted by k0ST

AFAIK, only higflow has it on stock (in Europe) - http://www.highflow.nl/pompen/laing-...p35x-pump.html

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Cheers! Order placed! :up:

so will a 1/2ID 3/4OD compression barb fit on this pump?

Yes standard g1/4 ports.

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Quote:

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Originally Posted by Xel_NaGa

so will a 1/2ID 3/4OD compression barb fit on this pump?

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Yes, your fittings will work fine on the pump. It's the top/res that is restricted to smaller fittings. Hopefully a newer revision will correct this issue, as well as others soon.

Gabe, any update on the res release date?

Anything yet?

New! (12-30-10) : Revision 2 of the MCP35X reservoir is now shipping. It supports compression fittings for up to 3/4" (tube OD) as shown below, and features an additional port inside of the fill-cap, that can be used to install a remote fill-port.

http://www.swiftnets.com/assets/imag...s-rev2x250.jpg

The compression fittings above are shown for demonstration purposes only, and sold separately by Swiftech resellers. The shipped product includes a set of Swiftech barb fittings, and G1/4 port plugs.

Nice!
I could see myself making use of that fill-port option...:)

this might be a stupid question, but doesn't the sponge thing to prevent cyclones from forming reduce flow rate?

Quote:

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Originally Posted by gabe

New! (12-30-10) : Revision 2 of the MCP35X reservoir is now shipping. It supports compression fittings for up to 3/4" (tube OD) as shown below, and features an additional port inside of the fill-cap, that can be used to install a remote fill-port.

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Nice :)
If I may ask, why didn't you go with the Delrin for the top? I'm a bit worried about it's weight like MagisD...
The EK RMA thread got me thinking about materials, so I'm wondering if the res is extruded or cast acrylic?
Can't wait until Sidewinder gets this in stock!

Quote:

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Originally Posted by Boogerlad

this might be a stupid question, but doesn't the sponge thing to prevent cyclones from forming reduce flow rate?

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I wouldn't think so. That is not a sponge; its actually very porous; more like a mesh.


Have we consluded that this pump is worth the cost over a 355? I imagine its more worthwhile with the new design.

I haven't hooked up the V1 of the 35X res yet, but the Mini-Tank from Bitspower did perform better without the sponge. Also, the Swiftech sponge looks much less dense than the BP sponge.

Now I want to get that reservoir mounted... hmmm. :)

could one take out the sponge and prevent the cyclone from occurring if the res was completely filled?

Thanks Gabe, waiting for it to show up at stores. Finally get to rebuild.....

You can prevent the vortex and not restrict flow by simply not pushing the foam to the bottom, push it only as far as you need to to prevent the vortex.;)

Does anyone know if the MCP35x Reservoir will work on other aftermarket tops? It seems to use a G1/4 coupler, but I'm not sure of the lack of the holding pin will be a significant factor. I have an XSPC top, and I'd very much like to use this reservoir. Also, anyone know who has V2 in stock? All I see anywhere is the original, and I really need that extra top fitting.

Well, not sure, but if you dig into the 35x, it's a PWM 355 with Swiftechs custom top. So do you NEED PWM? It's Swiftechs top that makes it special.

I guess the 35x res is G1/4 thread, it kinda has to be, since the pump is G1/4 on the top.

No, the res isn't really out in the wild yet. I forgot to ask him at the XS party, GRRRR. When it will be showing up at the vendors. We dunno, he said it was shipping, maybe meaning on a boat to USA, dunno.

But it's done and it should be soon.

Gabe is a member here. Here is a post by him, PM him if you like?

http://www.xtremesystems.org/forums/...&postcount=168

Should I use stock top or XSPC Acrylic top with this pump? I may get the MCP35X-RES, if the XSPC top is recommended to use over the stock top will the MCP35X-RES fit with the XSPC Acrylic top?

Quote:

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Originally Posted by buddatech

Should I use stock top or XSPC Acrylic top with this pump? I may get the MCP35X-RES, if the XSPC top is recommended to use over the stock top will the MCP35X-RES fit with the XSPC Acrylic top?

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I would go with the top that comes with the 35X, as that is partially responsible for the test curve in the graphs on pump performance.

UK stock yet? Can it be use just via 12v in. My aplication for it has no pwr control

Quote:

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Originally Posted by Tetrafluorometh

UK stock yet? Can it be use just via 12v in. My aplication for it has no pwr control

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You don't need to use the PWM connector for the pump to work. Just connect the molex and it will run at full speed all the time.

Which brings me to my next question, is it normal for the pump (full speed) to be making more noise than 4 x GT 1850rpm at full blast?

The pump is mounted on the pad that came with it and I'm using the standard top.

Pump should be quieter. And question to you - are all air bubbles properly bled from water?

WHOA WTF i found a UK stock. It's 2X the price of a DDC with a top. Erm that can't be right

It's 109 USD retail.

Quote:

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Originally Posted by churchy

Pump should be quieter. And question to you - are all air bubbles properly bled from water?

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What I know of yes, maybe there are some hidden in the pump or something. None are visible in the GPU block or the reservoir.

It's a very high pitching noise.

woffen: pump's impeller is not frictioning by touching top? Maybe thicker O-ring might help to distance it?

As to rest, might be interesting reading - Skinneelab's MCP35X review.

there are two problem:(
1. the screw head of mcp35x is a bit over size, it cannot fully hide itself inside the bottom hole
2. the screw thread is not true M4, I try to tight it well but broke the top thread, :( lucky it's only 15MM, I can use anothor 20MM M4 screw to replace it...
Be careful... everybody use mcp35x.
it's a great pump. the top make it very silent even at top speed:)

I did not have the problem you listed as #1, as detailed in this photo. The screws are flush if not recessed 0.5 to 1mm.

Quote:

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Originally Posted by skinnee

I did not have the problem you listed as #1, as detailed in this photo. The screws are flush if not recessed 0.5 to 1mm.

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:D it's about 0.5mm only, use a ruler to check the bottom flatness shows the problem #1.

Gary only has 10, I got one, so get it fast if you want one!

Do you have to special order the version or does it automatically fill from the site?

Here, you need to scroll to the end of the page.
http://www.sidewindercomputers.com/reservoirs.html

Will this pump work with a 3pin fan controller?

I've read it gets the power from the molex connector and gets speed regulated from pwm. My fan controller is not pwm, but instead varies the voltage it gives to fan/pump.

Quote:

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Originally Posted by homefry

Will this pump work with a 3pin fan controller?

I've read it gets the power from the molex connector and gets speed regulated from pwm. My fan controller is not pwm, but instead varies the voltage it gives to fan/pump.

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That'll work just fine, you just won't have PWM signal to control (no signal means 100% duty). :)

RPM range from undervolting will be significantly less too...PWM control has a range of 1250RPM to 4500RPM, voltage control may only have a range of 2800RPM to 4500RPM (and the voltage required for 2800RPM may not be enough to actually start the pump). So if you plan to control the pump speed much, proceed with caution when using a fan controller--monitor RPM, err on the high side.

I've got the pump, and on full blast even dampened using egg crate material and held in place with elastic bands at full blast it's not silent... it's in the 40-45db range. It's a little better with the EK top as the delrin is much more dense and there's more of it versus the stock MCP35x top - kind of a cheap plastic, especially for a $100USD mini pump stock. Pretty steep, but the PWM feature is honestly pretty nice.

Just don't run it anywhere near full blast and you're good.

Quote:

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Originally Posted by chorner

I've got the pump, and on full blast even dampened using egg crate material and held in place with elastic bands at full blast it's not silent... it's in the 40-45db range. It's a little better with the EK top as the delrin is much more dense and there's more of it versus the stock MCP35x top - kind of a cheap plastic, especially for a $100USD mini pump stock. Pretty steep, but the PWM feature is honestly pretty nice.

Just don't run it anywhere near full blast and you're good.

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I don't know what you bought, I bought my mcp-35x came with a stock delrin top.

personally I use foam from power supply packaging works great on damping sound and vibrations.

If you dont hook up to pwm, it'll run at 100 percent unless you analog control the power through the molex or modded power.

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Quote:

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Originally Posted by chorner

I've got the pump, and on full blast even dampened using egg crate material and held in place with elastic bands at full blast it's not silent... it's in the 40-45db range. It's a little better with the EK top as the delrin is much more dense and there's more of it versus the stock MCP35x top - kind of a cheap plastic, especially for a $100USD mini pump stock. Pretty steep, but the PWM feature is honestly pretty nice.

Just don't run it anywhere near full blast and you're good.

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the MCP35X top is made of high quality Delrin.
as for the motor, at 100% PWM it is about the same performance as the MCP355 motor.

reason for the big difference in performance between the 355 and the 35X is our custom Delrin top.

the weight difference would defiantly make a difference in sound but the top isn't cheap plastic, it's just thinner delrin made for more function than looks, but the mcp35x was never advertised as silent. Good thing you have a sound meter and a silent place to measure dB : ). you should do more pump testing.

It should be considered a crime not to utilize automatic PWM control via temperature monitoring. If you haven't tried it, you don't know what you are missing. 1000RPM is dead silent and it only throttles up when gaming/benching/rendering...which is a small percentage of the time.

Before utilizing PWM controls, my office hovered at 42dbA due to fan/pump noise in the background. I ran it like that for years as my accepted balance between noise/performance. Now that I'm setup to PWM control the pump and fans(via sunbeam rheosmart), my office is around 35dbA. HUGE improvement....I can't believe I waited so long running everything at full speeds all the time.