game lags after a cuple of minutes.

i got an acer aspire7520 and amd athlon 64x2 dual processor with 2.5gb of ram. my laptop meets the recommended requirements to need for speed pro street. the game loads quick, but when i play it the game runs good(at minimum graphics) until like 2 or 3 minute later, its starts to lag. What can i do

Install new driver for your Graphic card. NFS support DirectX 9 or 10. Find that too.