MCW60 rev 1 vs rev 2

[lilmanmgf]

So I am desperately trying to find a second MCW60 rev 2 to complete my crossfire setup, but so far I have only been able to locate rev 1s. Does anyone have any experience with the cooling power of the rev 2 vs rev 1. I know the pin size changed from 1mm to .6mm. Any help would be great. Thanks.

[ScottALot]

http://www.frozencpu.com/products/11020/ex-blc-770/Swiftech_MCW80_VGA_Liquid_Cooling_Block_NVIDIA_GeF orce_ATI_Radeon.html

[k0ST]

According to this (http://www.swiftnets.com/products/mcw60-r.asp) the only difference is pin size. I don't believe the actual block cooling difference will matter much for your set-up (improves thermal resistance from 0.01 to 0.02 °C/W, according to swiftech info).

[lilmanmgf]

http://www.frozencpu.com/products/11020/ex-blc-770/Swiftech_MCW80_VGA_Liquid_Cooling_Block_NVIDIA_GeF orce_ATI_Radeon.html

The mcw80 is super restrictive and in general sucks compared to the 60.

[ScottALot]

I could've sworn there was very little difference between the two except for a slight thermal improvement.

[Wega52]

The mcw80 is super restrictive and in general sucks compared to the 60.

Do you have anything to back up that statement?

[lilmanmgf]

Do you have anything to back up that statement?

In every forum I've been on, including this one, people has mentioned how restrictive the MCW80 is.

[Wega52]

In every forum I've been on, including this one, people has mentioned how restrictive the MCW80 is.

He he where did the graphs go? Diddnt they show the opposite of what you are saying? :)

[skinnee]

I can confirm the MCW80 is very restrictive. Charts are coming in the next couple days...

[Wega52]

I can confirm the MCW80 is very restrictive. Charts are coming in the next couple days...

Cool, then there isnt much more to add to that matter. I was wrong :)

[BeepBeep2]

In every forum I've been on, including this one, people has mentioned how restrictive the MCW80 is.

But does it being restrictive automatically make it way worse than the MCW60 in many ways? no...

[Church]

BeepBeep2: it doesn't make it worse in gpu only loop. In multiblock loop it does, as lessened a lot flow hurts performance of other blocks.

[lilmanmgf]

But does it being restrictive automatically make it way worse than the MCW60 in many ways? no...

I have:
2 360 rads
1 Cpu block
1 GPU block

and I want to add a second MCW60. Restriction does matter.

[Church]

lilmanmgf: MCW60s are not as restrictive as MCW80 is. You should be fine with adding 2nd one. Good luck finding one though, as in almost all shops it's been replaced with MCW80 :/

[lilmanmgf]

Yeah, that is the issue I have been running into. I would prefer to get a second MCW60 rev 2, but I think I'll have to settle for a rev 1.

[Church]

Well, there is another option. Gabe in thread about Apogee XT rev2 (http://www.xtremesystems.org/forums/showthread.php?t=267820) noded positively on flow upgrade for MCW80 as well. For Apogee XT it left same thermal performance but reduced noticeably it's flow resistiveness (http://www.swiftech.com/images/apogee-xt-vs-xtrev2-pressure.png). No definite info yet if it will be released for sure and how well it will do in pressure drop area and how long we should wait.

[BeepBeep2]

BeepBeep2: it doesn't make it worse in gpu only loop. In multiblock loop it does, as lessened a lot flow hurts performance of other blocks.
...of course.
But here was what he said originally:

The mcw80 is super restrictive and in general sucks compared to the 60.
That could have stopped at "The mcw80 is super restrictive."


I have:
2 360 rads
1 Cpu block
1 GPU block

and I want to add a second MCW60. Restriction does matter.
Of course.

[lilmanmgf]

...of course.
That could have stopped at "The mcw80 is super restrictive."


I'm sorry. I like swiftech; I have one of their rads, gpu, and chipset blocks. I'm just annoyed with them for releasing a block which in my case would perform worse than it's predecessor. We won't know exactly how restrictive it is until we see skinnee's graphs, but from his comments it sounds pretty bad. It just makes me wonder how much development they put into it; and if they are fixing the flow rate why didn't they do it right the first time. I'm a mechanics guy, but when we design a part we have targeted performance numbers in mind and tweak it until we get our desired numbers.

Anyway getting back to point, rev 1 vs rev 2. So far one member commented how the thermal resistance between the two is very minimal. I guess I'll just snag a rev 1, but if anyone had any actual data comparing the two it would be much appreciated. Thanks.

[Church]

lilmanmgf: don't single out flow from everything else. It's not fully bad and fully unusable block. If you take gpu only loop, with same rad & pump, just with MCW80 instead of MCW60, for few degrees cooling itself will be better, dispite lower flow. In SLI or CF setup you also have option to parallelize two of MCW80s for pressure drop to be less. So it's not always MCW80 is worst. For me such worst scenario would be cpu + MCW80 in same loop, where very probably i'll see hurt temps on cpu. +If/when they release updated top for MCW80, it might happen to become usable for such loop setups as well. You don't mistake only if you don't do anything.
(BTW, when i wrote about parallelizing two gpu blocks, it's not about MCW60+MCW80 combo, but 2xMCW80, as with very different block restriction in parallel branches most flow will go through less resistive MCW60, with only very little bit through MCW80, with possibly much worse cooling on that 2nd card because of that)

[lilmanmgf]

I am aware that in parallel flow the the current, be it water or electricity, will travel through the path of least resistance. This is why if anything I would use a series setup between an 80 and a 60. The thing is most people who use universal gpu blocks do so to save money. As such I would wager that the majority of people just use one loop. So if a universal block doesnt place nice in a large loop due to restriction it's an issue.

I want to stick with swiftech because they make nice products and their gpu blocks actually have enough clearance between the ram and barbs to fit a heatsink and still be crossfire compatible. Unfortionately I cannot use their new product in my loop because it will kill my temps. I don't want to buy a 80 hoping at some point they release a fix which I can buy.

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[Church]

lilmanmgf: in your place i'd wait for (imho) soon to be released universal gpu roundup by skinneelab and get non-swiftech block with roughly similar pressure drop to MCW60, if by that time you didn't manage to find somewhere selling still in stock or maybe used MCW60 (eg. on ebay or @this forum classifieds or other places to get used LC gear). It should be a bit more safe bet then waiting for MCW80rev2.

[StAndrew]

I think I sold a Rev 1 and/or Rev 2 to Skinnee. If you ask nicely, he might let you buy one...

[skinnee]

Rev2... :)

[lilmanmgf]

Skinnee I would love you even more if you let me buy the rev 2!

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[skinnee]

Problem is, I then cannot test it on other GPU's. :(

[NaeKuh]

Problem is, I then cannot test it on other GPU's. :(

sure you can... u just need to repeat all your tests all over again. :ROTF:

[lilmanmgf]

:(
It's okay.

[lilmanmgf]

So where are the classifieds on xtremesystems?

[vhaarr]

So where are the classifieds on xtremesystems?

http://www.xtremesystems.org/forums/showthread.php?t=234860

[lilmanmgf]

Guess I shouldn't have lurked so long. Oh well.

[Church]

IIRC you gonna need at least 100 posts before being able to post there. Or it was just about posting for selling? Never was too interested in that section, just heard it mentioned few times here.

[lilmanmgf]

I have only had good interaction with forum classifieds. People tend to be better than ebay since they care about their "status" on the forums. In my case it really is the only option to attempt to find a second MCW60 since it has been discontinued. I have also gotten pretty nice deals on radiators and such.

[StAndrew]

Im sure there are plenty of MC60's out there collecting dust. They were a pretty popular block back in the day. Just put out a request (you can even try C's List) and wait.

You can also try Gabe to see if he has some old blocks laying around. I was looking for some Obsidian blocks for my 9800's and could only find 2 so I PM'ed him and he had a spare that he sent to me for free. Great guy!

Or if you are patient, I hear Swiftech will becoming out with an MCW80 rev2 with better pressure drop but similar performance (the MCW80, while many times more restrictive, beats the MCW60 in thermal performance.

[lilmanmgf]

Thanks, I'll give that a shot.