HD4850 Breaking Team Fortress 2

[Pixellated]

Upgraded my 8600GTS for a 4850 today, and it's working perfectly, apart from a complete gamebreaking of Team Fortress 2 (my most played game).

It'll run fine no matter what settings, at well over 100fps constantly, but every 5 minutes or so the framerate will inexplicably drop down to around 10fps, completely unplayable, no matter how much load is on the card. Some research shows that this is happening to a few people, but there's been no fix I can see.

Tried using older versions of Catalyst, it's still giving me the same problem. Tried many, many graphics options, tried forcing DirectX 8, but it still gives me the same problem, and only in TF2. Unreal Tournament 3 runs constantly >100, as does every other game I've tested it with. But it's no good if the game I play the most is crippled in the process.

I'm really tempted to RMA the card and get either get an nVidia 9 Series for the same price, or just go back to the 8600GTS and save myself £70, but it's been enough hassle with my first choice having to be returned because it didn't fit, and then OcUK not doing the refund right.

Has anyone got a fix? I've been sat here for about half a day trying all sorts of things, and getting nowhere fast.

 

[psychas]

did u clean your nvidia drivers properly ? (uninstall, reboot safe mode , driver sweep them) ?

i used to have such problem with 2900xt on css ages ago.

 

[tbz_ck]

you done the whole driver cleaner thing after uninstalling your NV card?

 

[Klo]

did u clean your nvidia drivers properly ? (uninstall, reboot safe mode , driver sweep them) ?

i used to have such problem with 2900xt on css ages ago.

Interesting, I have a 2900xt and have no problems at all!

As said, its probably a driver conflict problem from the Nvidia drivers.

 

[Loque]

i seriously doubt it has anything to do with nvidia drivers. if you uninstalled them, you shouldnt have to worry about them. driver cleaners are really not neccessary. they're just for paranoid people.

 

[psychas]

Interesting, I have a 2900xt and have no problems at all!

As said, its probably a driver conflict problem from the Nvidia drivers.

it was long time when it came out driver fix or something fixed the problem

 

[Pixellated]

Opened Driver Sweeper, and it detected my previous nVidia display drivers were still there. I'll try your advice, psychas + Post again with results.

 

[baked188]

wack the fan upto 40-50% and see if that helps. on my old 4850 if i left the fan on automatic it would do this in most games after 5 minutes or so, especially gfx intense games like GRID.

 

[Pixellated]

Sweeping the drivers and reinstalling did nothing to help, nor did changing the fan speed. I'm going to get a refund. Thanks for the help anyway, guys.

Edit: 8600GTS back in, TF2 running at a constant 70fps smoothly.