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Watercooling Dual MSI 6990's: Need Advice

post #1 of 17
Thread Starter 
Hey all,
I need some advice on cooling dual ATI 6990's (made by MSI). I have looked through the stickied threads (and they were very helpful), but I just wanted to double check with the pros before making any purchases.
I am buying the components from FrozenCPU.com. Here is my cart so far:



Is there any way I can get the price down, am I choosing the correct components, etc? These will be running 24/7, with no CPU in the loop; only the Graphics Cards. They currently run @ 73 Celsius on air.

Thank you for your help!
--Dylan
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SupaFunTime
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post #2 of 17
nope its those blocks man there over 300 bucks
post #3 of 17
Thread Starter 
Quote:
nope its those blocks man there over 300 bucks
Yea, they are quite expensive. Cant seem to find any alternatives that aren't as expensive or more so.
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SupaFunTime
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post #4 of 17
Do XSPC have any 6990 blocks out?

XSPC usually have very good prices on blocks and they're up there with the best performance wise. On a 6970 comparison the XSPC block actually beat out the EK block, I'll try and find it for you.

EDIT: Here we go http://www.overclock.net/amd-ati/962...w-b-vs-ek.html
post #5 of 17
Thread Starter 
Quote:
Do XSPC have any 6990 blocks out?

XSPC usually have very good prices on blocks and they're up there with the best performance wise. On a 6970 comparison the XSPC block actually beat out the EK block, I'll try and find it for you.

EDIT: Here we go http://www.overclock.net/water-cooli...w-b-vs-ek.html
Thanks, I'll look for a 6990 block by XSPC.

EDIT: Nope :/ No waterblocks for the 6990. Looks like I'm stuck with EK blocks (not that thats a bad thing performance wise)
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post #6 of 17
Historically, EK and Aquacomputer have held the top performance numbers on Radeon water blocks, especially where EK is a lot less restrictive and gets VERY good VRM cooling performance (like Aquacomputer). Unfortunately availability is relatively poor with Aquacomputer, the only places that can get their stuff to you in a reasonable time frame being Aquatuning and Aquacomputer themselves (though direct from AC is more expensive).

Consider this; comparisons like what was linked to aren't as reliable because they only show GPU cooling. If you want top-notch GPU cooling, get a universal block and heatsinks for the rest of the card. The point of a full coverage block is to cool the voltage regulation and RAM better than heatsinks, and simple comparisons like that don't show you how well they do that. Traditionally, XSPC blocks (and Danger Den blocks, for that matter) have not had the best VRM/VRAM cooling, actually falling pretty low on charts, even though they have EK-ish flow rates.

Make sense?
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Deep Blood
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post #7 of 17
Thread Starter 
Quote:
Historically, EK and Aquacomputer have held the top performance numbers on Radeon water blocks, especially where EK is a lot less restrictive and gets VERY good VRM cooling performance (like Aquacomputer).

Consider this; comparisons like what you linked to aren't as reliable because they only show GPU cooling. If you want top-notch GPU cooling, get a universal block and heatsinks for the rest of the card. The point of a full coverage card is to cool the voltage regulation and RAM better than heatsinks, and simple comparisons like that don't show you how well they do that. Traditionally, XSPC blocks (and Danger Den blocks, for that matter) have not had the best VRM/VRAM cooling, actually falling pretty low on charts, even though they have EK-ish flow rates.

Make sense?
Very helpful, thanks. I believe I understand what you are saying. Although the GPU itself may be cooled just as well (if not slightly better) by XSPC blocks, they may not fair so well with the rest of the chipset, making the extra money spent on a full-card waterblock by EK worth it (as it cools the rest of the chipset nicely).

So, the EK would be worth it, in terms of overall performance over a XSPC?
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SupaFunTime
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post #8 of 17
Quote:
Originally Posted by Knutty View Post
Very helpful, thanks. I believe I understand what you are saying. Although the GPU itself may be cooled just as well (if not slightly better) by XSPC blocks, they may not fair so well with the rest of the chipset, making the extra money spent on a full-card waterblock by EK worth it (as it cools the rest of the chipset nicely).

So, the EK would be worth it, in terms of overall performance over a XSPC?
Correct; if you're willing to pay extra, then yes, it would be worth it.
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Deep Blood
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post #9 of 17
DD has a slightly cheaper block @ $123 each:
http://www.frozencpu.com/products/12...l=g30c309s1389

don't forget the 5% off code "pcapex"
post #10 of 17
Just a heads up, I have serious doubts about a single 360 rad's ability to cool two 6990s. I would think you'd need at least a quad.
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