Test Report: EK D5 X-Top Rev.2

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Originally Posted by Martinm210

Now to encourage some future possibilities

Who's going to be the first to put the DDC in it's rightful place and develop a pressure oriented impeller (something more like the RD-30 or DDC) impeller with longer deeper vanes that are more suited for pressure intensive applications like we have in water cooling???

I'm not sure the impeller upgrade is something that can be reasonably fabricated for a marketable price, but it seems to me if you could surpass the DDC performance, folks would be willing to spend a few bucks. I'm not of experience to understand the motor differences, but something still seems appealing about the D5 motor that is calling for attention. The weakest link in the D5 pump appears to be the impeller, moreso than the volute. Just look at that curve, so much power wasted at high flow rates we can never use. Just imagine the possibilities with an RD30 like impeller and one of these great new tops..:D

Iwaki very routinely designs one pump and several different impellers that go with that pump to tweak the curves. Seems like the D5 could be tweaked much the same. And that would be more than simple efficiency gains, that would provide the possibility to completely change the curve. Something with a large hump right 1.5gpm and maxing flow around 3gpm would do just fine...:)

Nobody has taken that step yet, what about that poor, always ignored, crying for help, IMPELLER!!...:shrug::D

Ok, enough...just wanted to encourage some future tweaks to consider. Impeller upgrades have simply been ignored in all of watercooling aftermarket parts and I'm just curious about it...

Cheers to the next steps in making this great pump even better!
Martin

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i would definitely reconsider the d5 if they improve the pressure... i only have the 355's for their pressure output:up:

i'm not a designer.but if they can bring that 355 killa...then its certainly a :welcome:

good suggestion...:up:

skinnee, :up: It would be kind of nice to see what this gain in pressure has sacrificed in the way of flow. Maybe a quick test with a low restriction loop with both tops and then a high restriction loop with both, no temps, just pressure. :fact: ;)

The only way I'd buy a "355 killa" is if it was the same size or smaller and cost roughly the same. The D5 is simply too big to fit the case size I prefer with the fittings of my choice....mATX/Quick-fit.

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Originally Posted by situman

All manufacturers should apologize to Eddy for copying his full cover gpu block idea. He was the first to come out with it right? If not slap me silly.

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Innovatek was there before everyone else AFAIK.

Excellent review!
The accuracy of data is very high.
:up:
I have included the data of your test in the Spreadsheet.
http://www.pctunerup.com/up/results/...35623_xxxx.jpg http://www.pctunerup.com/up/results/...5655_xxxxx.jpg
SKL is your symbol in the Spreadsheet :D

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Originally Posted by strumf666

Hey Sherlock, before you start accusing everybody I want you to know, that I am Peter Štampfel and I bought your top for my personal use (and sent you back the item, for which I am still waiting to be refunded). Ljubljana is a city with more than 200k residents and I don't know everybody in person and as I stated in your inquiery prior to sending me the item, I am not affiliated with EK waterblocks.

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I see, it's just an extraordinary coincidence :shrug:

Peter, you have to ship the part to me. You can't keep the part and expect your money back.

Just so you know, you're living in perhaps the pc watercooling capital of the whole world. EK Waterblocks makes great stuff and almost everything you might need for your system, and they are located right in your town, you should really check them out.

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Originally Posted by tiborrr

Innovatek was there before everyone else AFAIK.

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Also Dangerden was I think before me... No problem Tiborr, I don't want this thread to go off topic.

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Originally Posted by situman

All manufacturers should apologize to Eddy for copying his full cover gpu block idea. He was the first to come out with it right? If not slap me silly.

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Dangerden made the first FC blocks way before anyone else IIRC

EDIT: lol serves me right for not reading the last page before I post

excellent!

Excellent review Skinnee, thanks a lot! ;)

Sorry to bump a old-ish thread but I have a question on this exact topic (not the accused copying BS!)

Being a W/C n00b, the different tops affect Head Pressure and Flow Rates, but what sort of impact does that have on the temperature in the loop?

I'm very tempted to get one of these, mainly for the ability to use barbs (I CBF hacking up the stock one) and an easier mounting method, but if it's going to make a difference of 1° then the cost might not be worth it. Ta.

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Originally Posted by downforce

Being a W/C n00b, the different tops affect Head Pressure and Flow Rates, but what sort of impact does that have on the temperature in the loop?

I'm very tempted to get one of these, mainly for the ability to use barbs (I CBF hacking up the stock one) and an easier mounting method, but if it's going to make a difference of 1° then the cost might not be worth it. Ta.

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Like most things it depends on the loop. But these tops do help performance in the head pressure and flow rate which are both good to help lower temps. To what degree? Well like I said, it depends on your loop. Being able to easily put barbs in was almost worth it in itself.

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Originally Posted by downforce

Sorry to bump a old-ish thread but I have a question on this exact topic (not the accused copying BS!)

Being a W/C n00b, the different tops affect Head Pressure and Flow Rates, but what sort of impact does that have on the temperature in the loop?

I'm very tempted to get one of these, mainly for the ability to use barbs (I CBF hacking up the stock one) and an easier mounting method, but if it's going to make a difference of 1° then the cost might not be worth it. Ta.

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>1° to none and probably depend on block too. I change a weak sauce eheim hpps pump to ddc2 on zern pq+ before and didnt see any jack of difference on temp. Now using xspc res/top just because of it compact size.

There some buried zombie thread somewhere where people mod the stock top. It pretty good. Go dig it.:D

Quote:

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Originally Posted by downforce

Sorry to bump a old-ish thread but I have a question on this exact topic (not the accused copying BS!)

Being a W/C n00b, the different tops affect Head Pressure and Flow Rates, but what sort of impact does that have on the temperature in the loop?

I'm very tempted to get one of these, mainly for the ability to use barbs (I CBF hacking up the stock one) and an easier mounting method, but if it's going to make a difference of 1° then the cost might not be worth it. Ta.

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Take a look at Vapor's recent test on the GTZ to get a feeling for how much flow rate impacts performance. It's probably one of the more flow sensetive blocks too.

http://vapor.skinneelabs.com/C2Q/GTZQ/GTZQ.png

The difference between 1GPM and 2GPM is roughly 1 degree. So the differences we're looking at here for pump tops is really small when speaking degrees.

.2GPM will probably only amount to about .2C...etc.

@Sparda: Yeah I've seen it. There are two factors .. 1) tools; 2) effort + time.

@Martinm210: Thanks, that's pretty much what I was after, but doesn't make the decision easier! Now to work out if it's REALLY worth the ~$40US!