Overheating problems.

[Okiura]

85c isn't too bad tbh its's what i run at and your well within you operating temp if the max for your card is 105c, just don't OC it too much and you should be ok

Edit: and keep it clean clogg'd vents from dust is a pretty common cause for a over heating pc it's always good practice esp on a PC that's under alot of heavy load to clean it regularly.