Board to purchase new tower pc

[Bane !]

hi all

can you help me for buy a new tower pc for play cod because i have again fps problem and cod is finish for me for the moment ?

Which tower pc choose?

RAM, graphique card, processeur, acer, hp etc ... ?

for 250 $ max

and what choose for play cod windows 7 windows 8 windows vista ?

thx for help because cod is finish for me

Bane

[|HrC|]

Well,post a link to your closest pc shop...i can pick and choose some components,but that would be vain if that components arent available in that shop.
and 250$ arent good amount of cash. :/ hm.
i mean,in my country,for 250$,theres no way you can buy pc for gaming.