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what blocks should i get for 2 7970's

post #1 of 20
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Hey guys. I just purchased 2 MSI 7970's and was planning in watercooling them. What blocks would you all recommend for these cards in a crossfire setup? Also. I was planning in routing pump CPU GPU 1 down to GPU 2 and go to the rad (420 mom) and to the rest. My thought was that the cpu runs cooler than GPUs and since they can run warmer it would be better to put them in after the cpu
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Ol' No Name
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post #2 of 20
for me, id go with watercool's heatkiller 7970 blocks and backplate. im not sure on which 7970 gpu blocks perform better, but the heatkiller with its awesome backplate is just too slick. its pricey, though.

if you're only using one rad, then it would be better to route your loop to the cpu first.
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Lanu Moana
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post #3 of 20
I'm currently using a the Heatkiller 79X0 Block(s) and loving it/them. Just waiting until I get my other 7970 back from RMA and I'll be running them in crossfire. With a little help from the people (I made a dumb loop setup mistake) here, I'm running at 25C idle and 35C under 100% load. Radiator is a 480 RX XSPC. So my humble opinion is that the Heatkiller blocks work well and look very nice (I got the Nickel ones). Good luck!

EDIT: From everything I've read (I'm still very new, but have done a lot of research), for the most part, loop order DOES NOT matter. The water/coolant (assuming you have good flow) is traveling too quickly to heat up at specific points. Instead, the liquid is heated up as a whole, therefore loop order (other than res before pump) doesn't matter much.
Edited by spartanxxx10 - 1/8/13 at 8:26pm
post #4 of 20
Quote:
Originally Posted by spartanxxx10 View Post

EDIT: From everything I've read (I'm still very new, but have done a lot of research), for the most part, loop order DOES NOT matter. The water/coolant (assuming you have good flow) is traveling too quickly to heat up at specific points. Instead, the liquid is heated up as a whole, therefore loop order (other than res before pump) doesn't matter much.
Correct, most pumps are pushing gallons of water per second, max difference is around 1c. Which is worth mucking around, make the tubing nice and neat.
post #5 of 20
+1 on heatkillers!

very nice blocks!
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post #6 of 20
I would get the new EK Block. All you need to buy now is $25 bridge to connect the cards and it look better.

Ishimura
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post #7 of 20
While I don't have a 7970, I do have a Watercool HeatKiller GPUx3 680 "Hole Edition" Block (and Backplate) and it is BY FAR the nicest, sturdiest, best-built, best-finished waterblock I've ever seen, much less owned! It's also the heaviest, as it's a seriously thick chunk of extremely-high-quality copper!

Also, for what it's worth, BundyMania got the best temps from the Heatkiller block when he tested ~11 different ones:

   
Z77 Bench-a-lot
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Z77 Bench-a-lot
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post #8 of 20
I would go either with a swiftech (Comes full package with a backplate) or an EK (Doesn't come with a backplate and requires special connections).
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post #9 of 20
Thread Starter 
Well to be honest taxes have just gone up where I live and I am not sure I can see water cooling them in my future for a while so that's that but thanks for the info
Ol' No Name
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Ol' No Name
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post #10 of 20
Koolance 7970's can be had for $70 refurb from Koolance Direct store. I bought two and very happy with them.

I used Swiftech SLI connectors to connect the two cards.

I wasn't going for looks since my machine is not entering any beauty contests plus I have limited funds for my hobbies so I was going for the best bang for the buck.
Edited by Unhooked - 1/22/13 at 1:43pm
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