why cant i run COD MW2 on max settings??

i have a intel C2Q 2.33, a gigabyte Main board, 2GB Ram, 9800GTX SUper clocked and Windows 7 64 bit, i can run the game on high settings on Res 1680x1050 on my 19 inch montior and it runs prefectly, if i up the settings to Extra it do not stop lagging, to laggy to play, i even tryed the game on my 32 inch HD TV using a Res of 1440x**** and it still laggs on Extra settings, shouldnt i be able to play it just fine?

Are you playing multiplayer or when you say "lag" do you mean that your framerate is low?

playing singleplayer

playing singleplayer

xYourSweet6669x

You need more RAM.

I have pretty much the same system specs the OP has, except I have 4 GB of RAM, and I experience hang-ups as well. I doubt that this game is all that more demanding than CoD4; it should run fine.