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Trying to change pci-e port for my 2nd gpu without sucess?

post #1 of 6
Thread Starter 
I am running sli gtx660´s. And the problem is that i have so big gpu cards that i should have the lower card in a *8 pci-e port instead of the second *16 pic-e port cause of the heat. When playing games (i only play eve-online and dota) my cards arent running espcially hot or throttles but the top card is now like 5c hotter then bottom card. Maybe i shouldnt bother anyway since its so low temperature and i will get a slightly decrease in performance when swapping from a *16 port to a *8? I have really good fan setup and case is about 26c. And i have 1 cougar fan setup right infront of intake for the top and bottom card? Take a look at my rig in its picture and u see how close the cards are to eachother, then add intake is at bottom of cards so the card on top gets alot of heat from lower card, but ohh well its like 5c. What would you guys do, cause i plan to have this rig for a while? Thnxks in advance!

860ce210_snakesnest.jpeg
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post #2 of 6
Well do you use either eVGA PRecision or MSI Afterburner for a custom Fan Profile?? IF not I would use that and set a custom Fan profile for your cards as Auto usually keeps the cards NOT AS COOL..

here is my Profile I use for my 590GTX:



post #3 of 6
You have Kepler GPU's.

Unless youre going over 70C you should be fine. They dont start to throttle (slow down clocks) until after they reach a thermal point around 70C.

If you are experiencing throttling, then you should set up a custom fan profile using EVGA Precision, GPU Tweak, MSI Afterburner, or any revision of RivaTuner that you find comfortable for you to use.

If you are not satisfied, you can look on upgrading your motherboard to one that will possibly have that one slot space in between your PCIe slots? Im not sure what motherboard you will need; you should make a thread in that section and maybe the mobo guru's can help you out there.

Usually that helps a lot for SLI/CF cards that are that close. You can try zip tying or modding or figuring out a way to mod some fans to get them blowing through the front of the cards (like on the hard drive cages would be a good mounting spot) because it looks like you have the reference blower fans that blow heat towards the back.

I mean this is only if youre experiencing throttling and are in dire need of cooling. If you are 69 and never hit 70C i'd say you dont need to worry. Unless youre actually experiencing throttling and youre receving fps drops where your gameplay is affected in any way... then when you should start worrying.
post #4 of 6
Thread Starter 
I got hmm about 6*120mm fans blowing on those gpu´s and they never go over 70c except heavy benching. But on other side they dont go over 70c heavy benching either since i just turn on fans to 100% then for shorter periods of time smile.gif Ahh well i wonder how much decreasement it would make to try and move the bottom card 1 notch further down. And keep both cards at same temp. Here is my fan setup around the gpu´s:

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post #5 of 6
Quote:
Originally Posted by hyp3rtraxx View Post

I got hmm about 6*120mm fans blowing on those gpu´s and they never go over 70c except heavy benching. But on other side they dont go over 70c heavy benching either since i just turn on fans to 100% then for shorter periods of time smile.gif Ahh well i wonder how much decreasement it would make to try and move the bottom card 1 notch further down. And keep both cards at same temp. Here is my fan setup around the gpu´s:


Honestly adding more and more fans is just going to cause more noise. The only parts in the GPU that emits the most heat will be the VRM's and the GPU itself. The only real cooling you need is in front of the GPU so that maybe the extra air will help cool your VRM's (even despite you having an enclosed reference blower cooler). Maybe the fan on the side directly of the GPU may help;but two fans wont in a row will make no difference; in fact you may even damage your the slower spinning fan (slightly - over time) from the faster blowing one next to it.

If you dont throttle during everyday gameplay then you dont need to worry.
post #6 of 6
Thread Starter 
Thanks for your advice! Well its like 30 dollars fans and i want them to last so i might reduce a fan or two then!
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Ye Olde Computer!
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RAMHard DriveCoolingOS
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Benq gl2250 Hp le2201w Samsung 205BW Andersson KDD 1.5 
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