Hi. i have hd5770 vapor-x Graphics card. PSU high power 500w. Card's temperature is 70 degrees. After i run furmark about 30 second later it gets 100 degrees on gpu-z. it seen 80 degrees on furmark. I did some research. it is too high for this graphics card. I touched cooler headsink and it was cold i think. i renew it's thermal material khan gaming thermal material about 6-7 months ago. it was high 6 7 months ago and still high. There is no problem in games battlefield 3 ulttra high 20-30 fps. In high 50 fps. What is problem you think? Thank you and sorry for bad english.
And it has discoloring like oxidation. i cleaned it with synthetic tiner. Card's old owner was using it 230 W psu(Phenom x2 555 cpu). Card is never overclocked. and here is a picture explaining current status. http://i.imgur.com/Jg6bvmN.jpg
i will replace it again in a few days. This temperatures are high but there is no problem with gpu. fps is normal. PC isnt get closed. everything is fine except temperature. Cards heatsink and back board is not so hot.