I'd try switching the location of the card to see if that has any effect. If it's an airflow issue, you could speed up your case fans. For me, if I bought 3 of the same card and one of them ran hot regardless of it's placement, I'd send it right back for RMA. If you mod the vbios to fix it, you wont have to run a custom curve in windows either.
true it is an airflow issue there are three cards stacked right on top of each other and they are blower style coolers. I have 3 of the evga titans
i may give this bios mod a try. i really do like osx but i like to game from time to time also.
in windows it idles at 60c at idle but it has 2 other cards under it producing heat also so im sure they dont help. if i only had 2 cards im sure temps would be fine.
i should also mention that i have 3 40 inch 4K displays hooked to the first card and 3 32 inch 1440 displays to the middle card so for temps there right where they should be as long as the fans ramp up. when the displays are off and the computer is idling in windows the top card sits at around 30-35c but as soon as the displays kick on they all jump up in temp. hard driving that many pixels.
Ah OK. That sounds more like it. A long time ago I was messing with the AppleGraphicsPowerManagent Kext (AGPM) to mess with the behavior of my 570 and 580. I would think that switching it to higher power modes would also kick the fans up but I'm not sure on that one. There was also a app called SMCfan or something like that that I used to use for my laptop but I don't think it had options for discrete GPUs. I think the VBIOS mod sounds like the most elegant solution if you're not scared of flashing. Placing a fan in front of that stack (to push cooler air between them) could also do the trick. Let us know what you figure out.
