I have an 8400 gs and ive always played counter strike source fine 60 fps with a minimum of 50 but now for some reason in some certain areas it drops to like 40 and 30. This has never happened before i know this video card sucks for games but why is it dropping now? Also the computer im using is brand new and built it myself about 2 months old. Is it my gpu thats the issue or my cpu or something else. I have a phenom 965, 4 gigs of ram, and a gigabyte GA 970A ud3 motherboard.