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Need some recommendations for a water block for my Crossfire Radeon 6970s

post #1 of 16
Thread Starter 
I'm looking for something that is pretty superior to air cooling, that will get me at least 10-15C drops under load, and I also need to know if its possible to have one GPU (Top) with water cooling, and leave stock on the other, and still be able to manage fan speeds in MSI the same way? Also the block has to be small enough to where it will work with my crossfire setup. The maximum I ever want to see that top card get even under 100% load is 75C, so I need something that will get me that or better, guaranteed.

I would prefer to just water block the top card, but if its not possible to have 1 air and 1 water cool and be able to control fan speeds for both, then I will consider just doing them both. Money isn't an issue, I just need something that is undoubtedly superior to the air cooling I got and is small enough to fit in crossfire setup. According to HIS, my cards are the same as layout as reference, minus a bios switch.

I'm also considering replacing my Cooler master 212+ and just doing water cooling on everything, and I don't think there should be any problems doing that in the case I got.
Edited by chaosblade02 - 11/8/11 at 1:56pm
post #2 of 16
If money's no object then you should definitely WC both cards. To give you a point of reference, my 6970's never go above 48°C even under 100% load in Furmark, even with the CPU running full tilt as well. I like the EK blocks myself, pretty much any of their reference blocks will work well. I don't think running one on water and one on air would mess up your ability to change fan preferences for the second block, but then I don't know anyone who's done a hybrid setup like that before... If you're crossfiring I'm not sure why you would even consider watercooling one and not the other... Anyway, the blocks will actually cut down on the size of the card once you pull off the stock heatsinks so you don't have to worry about space. Also, if you're looking at a custom loop like you're talking about it seems silly to WC the GPUs and not the CPU. Anyway, that's just my two cents.
    
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post #3 of 16
Thread Starter 
Quote:
Originally Posted by Nicktlloyd;15622312 
If money's no object then you should definitely WC both cards. To give you a point of reference, my 6970's never go above 48°C even under 100% load in Furmark, even with the CPU running full tilt as well. I like the EK blocks myself, pretty much any of their reference blocks will work well. I don't think running one on water and one on air would mess up your ability to change fan preferences for the second block, but then I don't know anyone who's done a hybrid setup like that before... If you're crossfiring I'm not sure why you would even consider watercooling one and not the other... Anyway, the blocks will actually cut down on the size of the card once you pull off the stock heatsinks so you don't have to worry about space. Also, if you're looking at a custom loop like you're talking about it seems silly to WC the GPUs and not the CPU. Anyway, that's just my two cents.

48C under full load? Kombuster makes my top GPU easily get in the 90C range, and I stop it right there due to risking damage. Although I'm pretty sure it would go higher if I let it, may even completely burn it up unattended.

It doesn't appear Newegg sells GPU water cooling. I could find nothing in the search but a few air cooled ones.
Edited by chaosblade02 - 11/8/11 at 3:20pm
post #4 of 16
You need alot of rad surface to cool those cards smile.gif
like a rx480
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post #5 of 16
I have the XSPC razor 6970 block, great temps, around mid 40Cs with a i7 2600k before it in the loop. Those temp are with a 1.29v 1ghz/1450mhz OC on 100% load for 24/7 Running Boinc.
I used to get 75C-85C running the reference stock cooler.
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post #6 of 16
Why not just w/c both cards? tongue.gif You said money isn't an issue.. whistle.gif

I'd recommend EK blocks for your 6970's. I have EK blocks on my 5870's. They keep 'em nice 'n' chilly. smile.gif The EK blocks for 6970s would be good.

You would need at least a 360mm of rad to cool both GPUs and a CPU if you decide to do that. The HWLabs SR-1 and XSPC RX series rads have lower fin density thus liking lower speed fans. The HWLabs GTXtreme series and other rads with higher fin densities require fans with high static pressure to perform the best...
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post #7 of 16
Thread Starter 
So if I was to buy the rad, fans, the pump, the blocks for the GPUs and the CPU, and all the connectors, tube and etc, we are easily talking $500+?

I said money isn't an issue because I wanted to know the best options I have, it doesn't mean my budget is limitless, LOL. I'm close to the $2200 mark on my rig already. If I was planning on a 3k+ build I would have gotten crossfire 6990s.
Edited by chaosblade02 - 11/8/11 at 3:47pm
post #8 of 16
Yea watercooling is not cheap
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post #9 of 16
Quote:
Originally Posted by chaosblade02;15622968 
So if I was to buy the rad, fans, the pump, the blocks for the GPUs and the CPU, and all the connectors, tube and etc, we are easily talking $500+?

I said money isn't an issue because I wanted to know the best options I have, it doesn't mean my budget is limitless, LOL. I'm close to the $2200 mark on my rig already. If I was planning on a 3k+ build I would have gotten crossfire 6990s.

Could be... Uh, depends weather you want compression fittings or barbs, weather you want to spend the money on a pump top, etc...
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post #10 of 16
Thread Starter 
Hm, may have to wait till Xmas bonus to do that.

Btw, what happens if you get a leak? Royally screwed? Sizzling motherboard? Just in case Murphey decides to screw me later on. Or do you use non-conductive coolant as a safety measure?
Edited by chaosblade02 - 11/8/11 at 3:56pm
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