|It's this board then? A P31 Neo2-F V2 and not a P31 Neo-F V2?|
Here's a psu label with the info we need...
"Don't tell me agen try switching lower maybe to much W"
I never said any such thing, nor would I ever make such a statement...git your stuff together.
"Second i have 500W Power Supply, thats enaught for my system,"
Says who? What is the amperage on the +12v rail(s)?
A HD4850 needs a minimum of 11-12 amps of +12v power to run a 3D game. If you don't have that kind power available, it could be the cause of your problem.
You may have another problem that is causing this but we need to start with the psu or try a different video card.
Have you reseated the video card? Is the 6 pin power connector plugged in?
If you don't want to answer my questions or if you don't want my help, you can just say so and I'll go away.