Originally Posted by ahnafakeef
As far as I can tell, when the temp limit is set to 80c, the card definitely throttles to lower clocks when it hits 80c. Encountered this problem when gaming and thats when I was advised to set a custom fan curve in AB. It was enough to keep temps below 80c for that time (probably because of the game I was playing which if memory serves me right was Tomb Raider).
I'm not too familiar with the specifics of GPU Boost 2.0, but as far as I have read it works much better with 780s than with Titans. For the best and most expensive consumer card on the planet, Titan sure is giving me a lot of headache.
In my experience when playing Metro Last Light, throttling was reduced a lot but not completely gone when I had upped the power limit to 115% from 100% (which also upped the temp limit to 94c). I've been using Murlocke's 1.162v and 1.175v BIOSes (1150MHz core clock) for gaming and Naennon's 1.212v BIOS (1202MHz core clock) for benching Valley. Upping the power limit (linked to temp limit, effectively upping the temp limit to 94 as well) with Murlocke's BIOS resulted in keeping the card at 1137MHz (so the 1 bin downclocking thing might actually be something). The card might have (not sure though as I was gaming) downclocked to 1124MHz once or twice, but its the 1137MHz point that I remember seeing over and over again.
Another thing I should mention is that when I contacted Murlocke, he told me that these modded BIOSes are responsible for the excessive heating (meaning the excess temps) and that the stock BIOSes keep the card much cooler even at the same clocks of the modded BIOS. Dont know if this is true for the TI BIOS though since I havent used it yet. I think if it could be identified what these modded BIOSes are doing to overheat the cards and fix it, it would help us to stay well below that supposedly 80c mark.
If you havent seen it yet, here
is a thread by specopsFI on the subject of overclocking Titans and 780s. He knows quite a lot about it and probably has a lot to contribute.
Also on the matter of throttling, I installed the 320.39 drivers to see if it gave me a higher score in Valley. What was normal was that there was no throttling at all (had my eyes pegged on the core clock in the OSD) from the 1202MHz mark in Valley. What was beyond the ordinary for me is that (for as long as and as many times as I checked) there was no throttling in Crysis 3 from the 1150MHz mark with Murlocke's 1.162v BIOS (I needed 1.175v in Metro Last Light to stay close to the 1150MHz mark). Even the temps stayed around the 80c mark. And no, its not an isolated case for Crysis 3 because I then installed 320.49 from the official GeForce site and throttling came back at me like crazy, although the temps were not too different.
So thats all I have to share for now. Even if it doesnt help anyone, maybe someone can advise me based on these incidents as to what I can do to get a throttle-free, low-temp overclock on my Titan.