get this: Newegg.com - ZOTAC ZT-40704-10L GeForce GT 440 (Fermi) 1GB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready Video Card
it can run CA with no lag on max settings, and even record with no lag also. it can even play COD MW2 with a little lag on medium settings.
(i just got it yesterday. its amazing)