I have a MSI HAWK 7870. Because I have big fans on my CPU cooler, the GPU sits in the secondary PCI-e slot, right above the PSU. There are also a few thin header wires that go in between the PSU and GPU. I am afraid that this causes my temperatures to go up while gaming.
In Far Cry 3 1080p on Ultra, my GPU temp peaks at 72*c after about 2 hours of game time. This scares me so I shut it down. At idle, the GPU temp is 25*c, so that isn't too bad.
Is 72*c while playing Far cry 3 a cause for concern? I don't want to fry my GPU.
Download MSI Afterburner. Then set your Fan speed to "Auto."
That will adjust your Fan Speed according to your GPU Usage. Very Helpful software.
+1 on afterburner love the software. And yes your temps are fine if they were to go into the mid 80's and start creeping towards 90 I would say you would have something to worry about but you sound golden at your current temps sir.