No,i playing all kind of games without lagging at normal option
my specs:
CPU : AMD Phenom II 965 (4X 3.4)
VGA : ATI 4670 (1 GB) DDR3
Ram : 2X 2GB DDR3 1600 Elexier
HDD : 250 GB 7400 RPM
OS : Windows 7
and etc...
Are you sure your PC is clean of any viruses? virus reduces your PC speed as well.
Otherwise the problem is from the game, prepare new one and check that out.
[Edited by Evanscense, 7/7/2010 2:25:37 AM]