I'm not sure how long this has been going on, but my 8400gs hovers above 90C and hits like 105C playing CS 1.6! PC has Pentium 4 + 1.5GB ram + 8400GS PCI. The computer seems to be normal, but the temp used to hover 60C. I don't plan on upgrading this PC anymore, probably buy a new computer in a year or so. I bought the video card to game, but it failed at that (TF2), so I use it just to web browse and play a bit of CSS and 1.6. I'm thinking I just revert back to the integrated graphics, 82845G chipset =/.
What happens if I do nothing? Video card will die? Should I just try and fix it somehow. or just take it out?
EDIT I forgot to add that I have underclocked the card to MINIMUM from stock to help with the temp. The overheating temps are WITH the underclock.
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You could always change the fan on the GPU. It will only cost a few bucks and probably solve your heat problem.