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Suggestions for dual GPU only water cooling?

post #1 of 6
Thread Starter 
Hi guys,

So if anyone may have noticed from my other thread, I ran into tons of problems trying to cool my triple crossfire 5850s on air. Unfortunately one of the cards had to be RMAed, so I have thrown those into another PC and have gone to three 5870s instead. One of the cards is an Asus v2 so it blows the hot air out of the case but the other two are non reference coolers.

I have since updated the stock airflow setup in my Antec 902 by adding an Ultra Kaze 3000RPM in the intake port, a Slip Stream 110CFM in the intake port, and another Cooler Master 79 CFM fan zip tied to the of the graphic cards bay; all of these are controlled by my Scythe fan controller. My temps at full load have dropped from 82C/74C (top/bottom) in an OPEN CASE setup to 71C/63C in a closed case setup.


As I imagine three 5870s will evidently run much hotter at 100% @ full load, I am looking to watercool two of the cards at first and then adding a 2nd loop later on for my i7 920 and the third 5870.

I am probably just going to add an identical radiator for the 2nd loop so please keep that in mind. Here is my first loop:

I am currently considering this setup:

- Swiftech MCR320 Radiator
- 3XScythe Ultra Kaze (on fan controller)
- Swifttech MCP 350 Pump
- Swiftech MCRES-MICRO REV2 reservoir
- Clamp/tubes/barbs
- These GPU waterblocks:
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=240_582&products_id=30793

This will be going in an Antec 902. The reservoir will sit on the bottom of the case and the radiator will be mounted to the back.

How current PC looks:

5745580333_6fe71920a8_z.jpg


So, how does this look? Do you think it will be sufficient for cooling two 5870s below 60-65C? I may switch the ultra kaze to some quieter fans (say Gentle Typhoons or Noctuas) to keep noise minimized as well as that is my biggest gripe.

Thanks in advance.
post #2 of 6
I don't imagine the 5870's get that hot do they?

I would get this for a nice budget loop:

Xspc X20 Res/Pump

10ft of 3/4 OD 1/2 ID tubing (get a cool looking color too smile.gif)

8* 3/4 OD 1/2 ID compression fittings or barbs (the compressions are a little more expensive, but look a lot cleaner)

8* clamps (Only if you were to buy barbs)

Xspc RX360 radiator

2* EK 5870 blocks (These are full cover blocks, which mean they will cool the entire card, instead of the block that you listed, which only cools the gpu core. Either one is fine, but the full cover is better)

Distilled water (get it at the grocery store)

PT Nuke

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CPUMotherboardGraphicsRAM
Core i7 920 4ghz 1.25v Evga Classified E760/E762 Evga Gtx 480 + Galaxy GTX 480 SLI 6GB Corsair Dominator GT 1600mhz 
Hard DriveOSMonitorKeyboard
Crucial C300 256Gb, Samsung 7200rpm 320gb, 2x W... Windows 7 64-bit Home premium Dell U2410 1920x1200 Wireless Logitech 
PowerCaseMouseMouse Pad
Antec Quatro 1200w Corsair 800D Razer Death Adder Office Depot thingy 
AudioAudio
Asus Xonar STX Sennheiser HD555's 
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post #3 of 6
Yea I would go with some full cover blocks as willan suggested. I only use full cover now. As for the res being good enough for cooling 2 5870's, it will be more than good enough. In fact, I would suggest putting all 3 in that loop, and adding just your cpu to a loop by itself with a dual radiator later on. IMO that would provide a much better setup.
post #4 of 6
Haha, welcome to OCN bud!

See I told you full cover blocks are the way to go, I still think the XSPC Rasa RS360 should be fine for your needs (two GPU's and a CPU loop), it is definitely the most economical route to take.

It is tough to fit all that in an Antec 902 case, but will look all the better when you do biggrin.gif

*EDIT* You need to do some serious wire management biggrin.gif that alone will improve your temps of the cards. Good Airflow = Win.
Edited by ajmidd12 - 5/24/11 at 9:36am
post #5 of 6
Thread Starter 
Haha, I wish I could go full GPU blocks but the cards I am concerned about are not reference design. One is a newer Sapphire card and has this cooler design:

sapphire5870.JPG

I think the GPU only block is my only option.

About temps, my 5850s run 70C/62C (top/bottom) at an overclock of 835 Mhz. I assumed the 5870 is basically a 5850 but at a higher clock speed and a better VRM (for those than have it).

For a GPU only block, what do you guys recommend for cooling the VRM and memory chips? I am still going to keep my Ultra Kaze blowing over them and possibly mounting a 80MM (smaller, if it can't fit) fan over the heatsinks.

Thanks again guys!
post #6 of 6
Quote:
Originally Posted by Asad_A203;13624215 
Haha, I wish I could go full GPU blocks but the cards I am concerned about are not reference design. One is a newer Sapphire card and has this cooler design:

sapphire5870.JPG

I think the GPU only block is my only option.

About temps, my 5850s run 70C/62C (top/bottom) at an overclock of 835 Mhz. I assumed the 5870 is basically a 5850 but at a higher clock speed and a better VRM (for those than have it).

For a GPU only block, what do you guys recommend for cooling the VRM and memory chips? I am still going to keep my Ultra Kaze blowing over them and possibly mounting a 80MM (smaller, if it can't fit) fan over the heatsinks.

Thanks again guys!

Honestly you do not have to cool the vrm chips. I ran my 4850 with gpu only cooling for over a year overclocked and they were fine. Its just better to have cooling for them.
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