Problem with Radeon HD4870

[JonyL]

I have a big problem with my HD4870. When I exceed 2x in antialiasing, complete planting, the screen makes that lag, flickers etc. I removed catalyst, install ATT Tool, ditto. Tested old catalyst drivers, ditto.
The problem that arises in all recent games so I did not affect the games! Even crash on Crysis warhead, nfs undercover ..

I hope some can help me

Level hardware:
Motherboard: Asus M3N72-D
Memory: 2GB gSkill PC8500
CPU: Phenom 9950 Black Edition
Graphics card: ATI Radeon HD4870 512mb
Power: 650W Corsair

Level software:
Windows XP Pro Sp3
Direct x9.0c
The last and final aty catalyst drivers (tested others as mentioned above)
+ Ati tray tools that I use to REGULATING ventilation cd graphics card

[JonyL]

Should flash bios of the graphics card?
Bios version: VER011.003.000.001.029329
I read that many have problems and that it came from the bios but it is new I want to be on before the flashée?
side football it is a day I flashed the bios not long ago

[Sarvan]

Regarding temperatures, what does it give?

[JonyL]

Correct, no worries to side. Anyway my 3DMark works correctly. That is when I usually the 8x has anti aliasing. I bought this card for more performance so I can enable anti-aliasing ..

[Sarvan]

Psychic,
1 I would first drivers to games if there's been patch in the meantime, if you active filters, it is that you have graphics card will be sought. Worked?
2 temperature, can be cpu.
3 to the bars of memory, who knows?
test sets with memory test, then a single and launches games in question and see what it says?
4 VAS