Problem with ATI HD 4870

[Fanchon]

I try "test" for overclocking my HD 4870. I have until now never overclock anything. This is why I have to be handled, click on "Auto-Tune" in the Catalyst Control Center.
Since then, as soon as I start a game, use one or the other card is at 99% and the temperature increases gradually.
In view of this, I is not gone further. My PC is relatively new, so if this just a technical problem .

PC info :
Medion Erazer MD X7305D
Intel core i7 920
ATI HD 4870-each with 512 MB
DDR3-in 8GB

Is this a simple problem to resolve?

[Fidelma]

It is normal that the temperature rises if the load is 99%. But to return to the level of your settings before you have to flash the bios of origin of your graphics card. you find your card as if it was outside the store.

[KADEN]

I have not understood your problem, 90 ° C is normal for a HD4870. As against the base of the O / C, good quality power supply.

[Fanchon]

The problem is that when I start a game, cards spend 99% of their use and make a strange noise