I wouldn't go over the set limits by the manufacture... That extra 10 degrees isn't likely going to yield much and could harm the card or shorten it's life. One of the things I learned early on is to get a really good cooler. That being said, if the fan is not that great, I would run a custom profile.
Yeah, I was worried too - I found a website via Google that used EVGA's Precision X to modify the thermal limit - apparently it will allow you to set the temp to 95C before throttling starts. Yikes. I can't easily change the cooler because the card doesn't use the reference design board, and it's very small. Water-cooling is an option, but I have nowhere for the radiator as the CPU's cooler / fan & radiator is in the way.
I made a custom fan profile in Afterburner, where the fan kicks in at up to 70% speed with temps below 60C - Then ramps up 7.5% per 5C thereafter. It works as the card stays cooler by 3-5C than before. There's a strange bug though with it, because if the custom fan profile is on, after 1-2 minutes of rendering time the GPU clock falls to 1072 Mhz (stock) and never recovers. It's temp will be between 60-68C. Weird.
For more info on how the boost works, read the old Titan reviews and search for GPU Boost 2.0. TR covered it very briefly, Anand has a lot more info on that particular feature
If it's a non-reference half-height card you're going to struggle to cool it any better that that. I assume you need a half-height one?
If not, it's probably easier to ebay it and buy a full-size model like the reference boards
or one with an aftermarket cooler
. Buying a 3rd-party cooler and fitting it yourself will be as expensive and additionally void your warranty.
Fantastic read about how GPU Boost works, thanks a lot.
I'm no longer worried about clock fluctuations as it's clearly by design, just when it throttles back to silly speeds and FPS plummets. As for the card/case situation, I do need a half-height card to fit inside the case. The whole cases dimensions are about that of an Xbox One. It's a PITA to keep it cool, hence my CPU cooler and the hack job I took to the side panel to mount the rad and fan!
My next build will be a case that can take full width cards I think, but there's still plenty of life in this one yet. I could possibly try adding some venting area to the side panel where the card is...?
Mega Beast - Intel i7 4790K | Gigabyte Z97X-UD3H-BK | 16GB DDR3 | SLI GTX 970 | Samsung 850 Evo 1TB
Mini Beast - Intel C2E QX9770 | Gigabyte X48T-DQ6 | 16GB DDR3 | KFA2 LP GTX 750Ti | Seagate 2TB SSHD