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Old October 3, 2008, 01:05 PM
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Default Next Budget Build - H2O This Time

Here's my propsed idea for my next build.

Intel E5200 (Goal is to get it to 4.0GHz)
Gigabyte EP45-DS3R
2x4850's in CF
4GB Mushkin Redline Acsents
PSU Corsair TX750

My 250GB Seagate hard drive and my LG DVD burner and my Cooler Master CM690 case.


I want to water cool this setup both the CPU and GPUs. Would you suggest a dual loop? one with a Dual Rad for the GPUs with the rad mounted ontop inside and then a single rad for the CPU mounted on the inside at the rear?
The only other questions can I run a dual loop off of one Swiftech MC665 pump or would I need two?
A question for others how have done water cooling in a CM690 any idea where I would mount the two pumps.
I was thinking about getting the EK-Multioption RES 250 rev.2, would these be big enough for a dual loop?
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Old October 3, 2008, 01:12 PM
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Any one of the "multi" res' would be fine... the size of the res has minimal effect on the loop so long as it's able to feed the pump.
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Old October 3, 2008, 02:00 PM
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MCP655 is powerful enough to cool 2 loops at least. I'm doing that at the moment, only thing is I have only one 4870.

I would suggest you to at least get a dual rad if not triple for those 4870's, they are hot and would require some nice cooling to get them nice and cool. A dual or a heavy duty single rad for the cpu should be fine, meaning a swiftech or black ice dual rad, or a black ice xtreme, a pa 120.1.. something in those lines.

sswilson is right, as long as the res can feed the pump, you're fine. I'm currently trying to setup 2 dual rads for my cpu and video card using one swiftech res and dd d5 pump (same as mcp655).. All I can say the swiftech micro res looks small, but isn't as small you think, all you have to do is when leak testing get the loop filled up, because once you get it filled, you won't need to add more coolant, as long as it flows all the way to both rads, pump, cpu/gpu block(s) etc..
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Old October 3, 2008, 03:05 PM
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What about using HW Labs Black Ice Xtreme II Dual 120MM with two XLF-F1253 120mm fans for the two 4850's and HW Labs Black Ice Xtreme Single 120MM with the XLF-F1253 120mm fan for the CPU

Specs on the fans are

61CFM
1500rpm
20db
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Old October 3, 2008, 03:15 PM
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I'm sorry for some reason I read that as 4870's.. If it is a 4850, one of those Swiftech res's would do, and for the cpu the black ice xtreme would do.. But that is me, I would wait for some more suggestion, they are better people like MpG, Apollo, Charlie, Vortex who can suggest better.
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Old October 3, 2008, 04:42 PM
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Quote:
Originally Posted by BALISTX View Post
I want to water cool this setup both the CPU and GPUs. Would you suggest a dual loop? one with a Dual Rad for the GPUs with the rad mounted ontop inside and then a single rad for the CPU mounted on the inside at the rear?
The only other questions can I run a dual loop off of one Swiftech MC665 pump or would I need two?
A question for others how have done water cooling in a CM690 any idea where I would mount the two pumps.
I was thinking about getting the EK-Multioption RES 250 rev.2, would these be big enough for a dual loop?
Not quite sure what you mean by "running a dual loop off of a single pump". If by that, you mean having a single pump push coolant through all the waterblocks, then yes, either an MCP655 or 355 with an aftermarket top will push through all three waterblocks and maintain good flow rates.

Usually, "dual-loop" refers to the act of running completely separate loops for different components, each with their own pump, radiator(s), and reservoir. In that kind of scenario, obviously two pumps would be needed, one for each independent loop. Technically, you can feed both loops off of one reservoir, but it's not ideal, and the EK multi-res isn't particularly well-designed for that sort of thing. So two reservoirs would be strongly recommended.
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Old October 3, 2008, 05:00 PM
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Yo MpG, wassap.. It is recommended to put 2 reservoirs, sure, but can't you use one, I've seen people using a swiftech micro res and a mcp655 pump to serve 2 different loops, as in one for the gpu side and one for the cpu (/nb/sb) side, and still having great temps. You'd know better damn for sure, I'm still learning so I ask (if you don't mind)
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Old October 3, 2008, 06:12 PM
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I think you're overstating things a little...

Yes, you can split the flow after the pump to travel down two pathways, and have them rejoin at the reservoir at the end. But there are a few reasons why this generally isn't recommended.

1) KISS. Splitting up = more connections = more possible places to spring a leak. Putting the components in serial is (almost always) less complicated and requires less space.

2) The act of splitting up the flow and then rejoining the flow will add a small amount of restriction to the loop.

3) While putting the blocks in parallel reduces the effective pressure drop, any subsequent improvements to flowrate would be butchered by the fact that the flow is suddenly being split in two. Thus, you effectively wind up with less flowrate through each block, reducing each block's effectiveness.The radiator would see improved flowrates, which might help compensate a little, but since most waterblocks thrive on turbulance, I can't see this being a net gain).

4) In parallel, the flow will travel according to which path offers the least resistance. Since you don't have any way to properly measure this, you have no idea or control which pathway will get more of the water. And the odds of the two pathways being balanced are pretty slim.

5) In any decent watercooling loop, the temperature of the water at its hottest and coldest is rarely more than a degree or two, even under full load. Furthermore, once you've got them on water, video cards don't usually see much benefit from an extra degree or two. So you're not really exposing later components in the loop to "hot water" in any meaningful fashion.

Those are all the reasons I could come up with right now. I'm not saying that you can't get great temps in a parallel loop, but a typical PC watercooling scenario (these days) is strongly biased towards putting the blocks in series. The one argument for multiple loops that I agree with involves secondary blocks, such as chipset/mosfet/RAM/HDD blocks, where any gain from watercooling those components is outweighed by the drop in flow they inflict on everything else in the loop. So throwing those in a secondary loop is a reasonable enough idea.
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Old October 3, 2008, 06:16 PM
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I don't see the reasoning why one res feeding two pumps would be any worse than two. Am I missing something simple here?
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Old October 3, 2008, 06:23 PM
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It's the multi-res that I'm not sure of. Since the top is pretty much an inlet by default, that leaves the three bottom holes to serve as two sends and one return. But since two of the bottom holes are right besides each other, I'm not sure how well that would work. Depends on the res, but I've seen some single-res-dual-pump setups that simply would NOT bleed for love or money. Others were just fine. If it'll bleed, should be okay.
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