I decided last night that even with the great cooling of the Gigabyte duel windforces the top card was always about 15-18 degrees (c) hotter than the bottom card and would reach about 85 degrees sometimes during long gaming sessions were the other card would just about hit 70 degrees.
So I decided I would move the bottom card to my third PCI-e slot even though this is only a PCI-e2.0 x4 slot (MY P6t-se has 3 pci-e slots working as x16 x16 x4).
I did some tests last night to see if or how much it effects performance in surround gaming but didn't have time to post my findings and I'm at work now, so I'll update this post later with the figures.
But basically there was about a 10% hit on performance and fps, which in surround gaming and having large resolutions affecting fps drastically, it can be the difference between playable and non-playable gameplay.
I try to make sure frames stay above 30fps at all times as anything below that is even noticeable to me and I'm not that fussy with performance, I noticed during tests and gaming that were it usually hit's 30-31fps during heavy load it now hit's 26-28fps and due to my preferences of not accepting below 30fps I had to lower resolutions to stay constantly above 30fps.
Another thing I came across was that my long time overclock of 860 core @1.050v just kept crashing and wouldn't stay stable until I increased the voltage to 1.072v.
My next concern with this was, will the extra voltage increase the cards temps and render the move of the cards useless. However the temperature only increased by 1 degrees and were the top card used to reach 85 degrees now both cards don't get hotter than 70 degrees.
So for the benefit of reduced temps, moving from an x16 slot to a lower down x4 slot there is also a drop in performance and overclocking stability.
Now my next question is what is more harmful in the long term to a GPU:
- Running at higher temps under load?
- running at higher volts under load?
If anyone knows I would really appreciate that answer