I dont know what is better for my CPU HD 5770 or HD 5850 , i want more 5850 cause its much more powerfull and can work better with dx11 applications what will appear , but i dont know if my cpu can hold it good , also what overclock should i do ? my mother board is ASRock P5B Pro , till how many GHz i can overclock it? 3.6GHz , less; more ?also i have 2 gb ram (in 1-2 months i'll put 4 gb) help me please!!!
Well between 5770 and 5850 definitely go for 5850.
A CD2 @ 2.9 is good for handling games,if you play RTS games or games like GTA IV or Prototype you will benefit from a faster CPU but in most FPS games you will be fine
But i would change your RAM first,2GB isn't enough.
Yes it will fine,also when the resolution goes up,most games become GPU limited,for example if you play a game at 1280x1024,then it may not use the full potential of your graphic card but the higher the resolutions goes,the more the games benefits from VGA