HD 7870 troubles

[Fafnr1984]

Hiya all,

A week or so ago I posted about Battlefield 3 not running all that well on my PC.
I fixed the immediate issue, but it was just too slow, so today I bought a new card - a Saphhire 7870.

It runs Battlefield 3 BEAUTIFULLY in full HD, ultra settings - for about a minute.
Then it crashes the game.

I didn't reinstall windows when I got it - I did, however, install the graphicsdrivers again.

There should be plenty of juice for the card - I have a 520w PSU - and it doesn't overheat. First of all, it doesn't have time, and second of all, I checked - it never has time to go above 50 degrees C.

I've tried every driver from the AMD / ATI site, but I am completely defeated here. My next move is to try reinstalling windows, I guess, but it doesn seem like it should be necessary for just changing the videocard?!

My specs are:

Core i7-860 @ 2.8ghz (stock speed)
Some Dell no-name mobo
4 gb RAM
2 x SATA harddrives
HD 7870
Chill innovation 520watt PSU

Thanks!!

 

[3DVagabond]

Is it only BF3? If so, I'd try reinstalling the game first, before I'd go through a new Windows install.

 

[Freddy1765]

Did you also uninstall the previous graphics drivers before installing new ones?

 

[Absolute0]

Yes you mention installing the graphics driver again, but not properly uninstalling and cleaning out the previous drivers...

 

[Fafnr1984]

Thanks guys - properly cleaning the computer of the previous drivers, and reinstalling them did the trick!

This is why I always turn to Anandtech forums before official support whenever I fuck up something

Thank you - everything is running great, and I managed to get an hour of BF3 in before having to head to bed