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Advice on watercooled 6950 CFX and i7 970 - Page 3

post #21 of 27
Quote:
Originally Posted by wondergod View Post
Generally I'd agree the only issue with this is when overclocking. If you are overclocking your video cards and CPU. By separating them you ensure that the GPU's heat does not affect the CPU loop which might limit your CPU overclock. I tested this once with my i7 920, and 3x4890s. I had a dual pump bay res that could switch between single loop or dual loop. The dual loop performed better while overclocking. While my overclock for the video cards were the same, the CPU benefited from having its own loop.

I personally prefer single loops with dual pumps, since then it's like having a backup pump already in the loop.
Maybe since you have three GPUs, that was the issue. But, in fact, in my experience, the opposite has been true: the single loop performed better every time.

I'm glad you shared, because I have never heard of this other than a "he said she said" scenario.
post #22 of 27
I can't really recall if I also tested with 2x4890's also, I probably did since I didn't own the 3 for the whole time, I did however always have a dual loop. So I probably did, but I don't remember for sure. The principle could be the same depending on your radiator and flow. I would honestly say it's generally not a problem however depending on his situation and his overclocking plans, I'd figure I'd throw it out there.
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post #23 of 27
Quote:
Originally Posted by wondergod View Post
I can't really recall if I also tested with 2x4890's also, I probably did since I didn't own the 3 for the whole time, I did however always have a dual loop. So I probably did, but I don't remember for sure. The principle could be the same depending on your radiator and flow. I would honestly say it's generally not a problem however depending on his situation and his overclocking plans, I'd figure I'd throw it out there.
I'm glad you did. It's nice to hear dissenting information direct from the source. Too often people try to refute me with third or forth hand information, and I'm like, "seriously guys?"
post #24 of 27
Thread Starter 
I'm planning to OC as far as temps/voltage will allow. This has pretty much always been my philosophy with overclocking.

That being said, I think I will go with the single loop with two pumps. I can always keep the GPU's underclocked when benching my CPU.

Now I'd like to get a cost estimate and idea of which parts I should get for the CPU loop. I won't be adding GPU blocks until later. My budget is fairly lenient. I want high quality, high performing parts.

CPU block: I've always favored the looks of the EK Supreme HF and I've heard it's one of the best performers. But I'm also aware that some people have had corrosion issues with the block. And I'm not sure about the differences between these:

http://www.frozencpu.com/products/10...?tl=g30c85s139

http://www.frozencpu.com/products/10...?tl=g30c85s139

http://www.frozencpu.com/products/10...?tl=g30c85s139

Tubing and fittings: I really don't know anything about tubing and fittings. I like the aesthetics of thicker tubes and Bitspower fittings, but that's the extent of my preferences right now.

Fluids: no clue here. All I know is I want either a solid black or UV orange color to match my build.

Reservoir: I want one of the oblong tube shaped ones that can mount on the mobo tray. I guess I can just pick whichever one I like since it doesn't really affect performance, right?

Radiators: I need a 360mm and 280mm. Pretty clueless about which brands/models to look at. Obviously less restrictive flow is better. Is push/pull recommended? I'd have to buy more fans for that.

Pump: I'm guessing Swiftech MCP655? I heard Laing also makes good pumps. I'd like to be able to control the flow speed for benching and quiet operation. Also, should I get two pumps right off the bat for just a CPU loop?

What else am I missing? Like I said, I'm completely new to watercooling and need people to hold my hand along the way.
Edited by aznofazns - 11/7/11 at 10:16pm
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post #25 of 27
Quote:
Originally Posted by aznofazns View Post
I'm planning to OC as far as temps/voltage will allow. This has pretty much always been my philosophy with overclocking.

That being said, I think I will go with the single loop with two pumps. I can always keep the GPU's underclocked when benching my CPU.
Good plan!

Quote:
Now I'd like to get a cost estimate and idea of which parts I should get for the CPU loop. I won't be adding GPU blocks until later. My budget is fairly lenient. I want high quality, high performing parts.

CPU block: I've always favored the looks of the EK Supreme HF and I've heard it's one of the best performers. But I'm also aware that some people have had corrosion issues with the block. And I'm not sure about the differences between these:

http://www.frozencpu.com/products/10...?tl=g30c85s139

http://www.frozencpu.com/products/10...?tl=g30c85s139

http://www.frozencpu.com/products/10...?tl=g30c85s139
You definitely want to go with the EK Supreme HF. The issue with corrosion was with their old nickel coating. Look for the EN nickel, and you'll be good.

For the most part, the differences between the blocks you've linked are cosmetic. Obviously, the all metal blocks will remove more heat than the part acetal ones, but the difference isn't worth the cost IMO.

Quote:
Tubing and fittings: I really don't know anything about tubing and fittings. I like the aesthetics of thicker tubes and Bitspower fittings, but that's the extent of my preferences right now.
I'm using some primochill something or other that was blue. I wanted blue tubing, so that's what I bought. 1/2 ID. I'm also using some generic barb fittings because I went cheap Bitspower is the brand name for fittings though, and if you want compression fittings, I'd probably recommend you stick with a known like Bitspower or Koolance.

Quote:
Fluids: no clue here. All I know is I want either a solid black or UV orange color to match my build.
You're best off getting the color from the tubing, not the fluid. Simple distilled water with a kill coil and a wetting agent will do the least "damage" to your loop. The other dyes and additives will have a tendency to gunk up the blocks.

Quote:
Reservoir: I want one of the oblong tube shaped ones that can mount on the mobo tray. I guess I can just pick whichever one I like since it doesn't really affect performance, right?
Minimal performance impact (again, the volume bit), so it's up to your aesthetics more than anything.

Quote:
Radiators: I need a 360mm and 280mm. Pretty clueless about which brands/models to look at. Obviously less restrictive flow is better. Is push/pull recommended? I'd have to buy more fans for that.
RX series is good if you want low noise and low flow fans. GTX Ice is good if you don't care about noise.

Quote:
Pump: I'm guessing Swiftech MCP655? I heard Laing also makes good pumps. I'd like to be able to control the flow speed for benching and quiet operation. Also, should I get two pumps right off the bat for just a CPU loop?
Most of the good pumps are just rebrands from one company. Both the MCP655 and the MCP35x (and their Liang equivalents) are great.

Quote:
What else am I missing? Like I said, I'm completely new to watercooling and need people to hold my hand along the way.
OCN and many other cites have great water cooling guides. I suggest you read those, and then ask your questions one at a time instead of wholesale. People get deterred by a wall of text for some reason.

Good luck!!
post #26 of 27
Thread Starter 
Will 1/2" ID tubing work fine on the EK Supreme HF? I read in the WC guide that people use 7/16" ID tubing for a tighter fit on 1/2" connections, but that would be dropping to 5/8" OD. I'd like to have thicker tubing for aesthetics.

Also, what does UV black tubing look like under UV light? Doesn't make sense to me how it's going to emit any color if it's black.
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post #27 of 27
I use 1/2" ID tubing with my Supreme HF. However, I use normal, run-of-the-mill worm hose clamps on mine to keep it tight. I decided that no leaks was more important than aesthetics my first time around doing WCing.

Maybe a weak purple glow?
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