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Heatsinks touching each other okay? Trying Accelero xtreme II on non reference 6970

post #1 of 8
Thread Starter 
So, I just found out the non reference 6970 is different not only with the VRM but also the height of the core(?) For those that have used the accelero xtreme it comes with 3mm spacers (short ones) and they are still too long by 1.5-2mm. So if I cut the spacers shorter it means the entire cooler will sit lower than its meant to and will come into contact with the VRM heatsinks, unless I also cut them maybe atleast 1mm shorter or more.

Picture:


Is it important that the heatsinks don't touch together? Or will could this possibly short the graphics card or something?
post #2 of 8
It will not short the card as the heatsinks will all be at the same potential.

It shouldn't matter if they are touching with regards to heat either as the VRM is likely to get hotter than the main heatsink and therefore a bit of heat moving away from the VRMs is a good thing.
 
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post #3 of 8
The GPU heatsink touching the VRM heatsink should not cause any problems. Some manufacturers actually have one heatsink covering both the GPU and the VRM.
post #4 of 8
Thread Starter 
Thanks guys, now I wish I could get the vrm heatsinks to connect better with the big heatsink.

hmmm....
post #5 of 8
the problem is if you don't cut enough. the vrm heatsink will actually jack the gpu heatsink up and not allow maximum contact with the gpu. make sure your gpu heatsink makes full contact with the gpu.
post #6 of 8
Quote:
Originally Posted by jepherz View Post

Thanks guys, now I wish I could get the vrm heatsinks to connect better with the big heatsink.

hmmm....

From when I installed an Accelero III on a reference 6970, I found that the way the heatsinks are applied to the vrms is more important the the size of them. I had used the included G1 thermal glue (something like that), and most of the heatsinks really didn't bond well at all to the vrms - this caused all sorts of weird problems from them overheating. So, I cleaned them off and applied the same (relatively small) heatsinks using Arctic Alumina epoxy and they worked spectacularly after that! All of the air blowing onto the bottom of the card (where the vrm heatsinks are) kept them really cool when applied right.
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post #7 of 8
Quote:
Originally Posted by psyclum View Post

the problem is if you don't cut enough. the vrm heatsink will actually jack the gpu heatsink up and not allow maximum contact with the gpu. make sure your gpu heatsink makes full contact with the gpu.

Yes. Be careful of this and make sure the heatsink has full contact with the GPU, OP.
post #8 of 8
Thread Starter 
Initially I was going to watercool the GPU but chickened out =/ It's going to be sitting there for 2-3 years at the least and the chance of it leaking scares me. So I had already put on copper cosmos heatsinks, they continued to wiggle with touch and 2 of them had trouble sticking, I put one of them back one about 10 times. Then I decided to take off the water cooler and try the accelero, my card has been sitting for 2 days and those copper heatsinks are actually all solidly in place. I didn't know this was gonna happen though so I already ordered higher quality thermal pads. Now I'm just waiting for those to put on the accelero provided VRM heatsinks. I guess I'm probably going to have to bend the fins on those to try to make them shorter. There are reviews on amazon about people with similar issues (having to cut the spacers shorter) but they don't mention how much to cut or anything about the VRM heatsinks but from measuring I'm pretty sure I'll have to do something x.x
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