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Will I see a difference between PCIe 3.0 vs 2.0

post #1 of 15
Thread Starter 
I recent built a computer with the AsRock Z77 Pro4-M + I5-3570k. However, I purchase the Gemini S524 heatsink from coolermaster which fits a 140mm fan. The problem is if I put my GPU at the 3.0 PCIe slot then the heatsink touches the back of the GPU. I don't really want to spend the money to buy another heatsink and 120mm fan since I already have a heatsink + 140mm fan.

I was thinking of just putting the GPU at the 2.0 slot so the heatsink doesn't touch the GPU but would I see a major difference between the two to make it worth forking out another 50-60 dollar on a heatsink + fan.
post #2 of 15
AFAIK. Current GPUs cannot reach the maximum bandwidth of PCIe 2.0 (x8?), so it should be fine.
Edited by Crepuscularity - 1/20/13 at 12:00am
post #3 of 15
What GPU? The other slots on that board are very low speed since they run off the PCH instead of the CPU. Your best speed is going to be PCIe 2.0 x4 and it could be PCIe 2.0 x1. Either of those is going to limit a decent video card, so you'd be better off putting some electrical tape on the back of the card and using the PCIe 3.0 slot.
post #4 of 15
Thread Starter 
It is a EVGA GTX660

and this is the board I have http://www.newegg.com/Product/Product.aspx?Item=N82E16813157306
post #5 of 15
Quote:
Originally Posted by ivoryg37 View Post

It is a EVGA GTX660

and this is the board I have http://www.newegg.com/Product/Product.aspx?Item=N82E16813157306

Yes, that board only has a single PCIe slot connected to the CPU. I would try to run it on the PCIe 3.0 slot if at all possible, but you can always try it on the other slot and see how much it affects performance. The 2.0 x4 slot will hamstring a GTX 670 or 680, but I'm not sure how much it'll impact a 660. Enough to not want to use it would be my guess, though.
post #6 of 15
Thread Starter 
Well this sucks, I was sorta relieved that I could have used the other slot but I don't want to waste my time. I think I may just sell the board and get one with two PCIe 3.0 slots.
post #7 of 15
Is the cooler lightly touching, or really touching? You could slide a piece of cardboard in between them if it is just slightly touching.
post #8 of 15
Thread Starter 
It is really pushing on it cause it touches the memory(I'm thinking on the back of the card.) which pushes the video card down. Its harder to sell a heatsink without a lot lost so Im probably going to sell my mobo instead to get a different one
post #9 of 15
Can you rotate the cooler to get more clearance? Not sure how that one mounts.
post #10 of 15
Thread Starter 
I actually rotated the heatsink every way and its just still too big lol. I have a top mount PSU case so one way touches the PSU enough that it doesnt fit in the case and the other way touches the GPU. I think Ive decided to get a new mobo. Hopefully I can sell the AsRock pro4-m
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