Originally Posted by Tinker
could be a CPU OC issue since the system is OC'd from 3.0 to 4.28. But all the new games like FC2, FO3 an Clear Sky runs fine with the system. Will lower the OC and see what happens later.
Yeah give it a shot. I had the same issue where FC2, Bioshock, basically any non-source game ran great. It was only source that didn't work. It was very frustrating especially since all the normal OC test came out fine. Hopefully, your board has a OC profile option. I saved my OC profile in one and loaded up my normal settings and everything ran great. Later I bumped up my OC to 2.8 (from 2.1) and still got good framerates.
I'll probably spend some time this weekend tracing down the issue. I have an Asus p5b and to get to 2.8 all I needed to change was the FSB to 350. I left everything else on auto. To get to 3.2, I had to change a bunch of voltages, and SPD timings. So I am assuming the source problems are something in those non-auto changes. My first suspect are the RAM timings.
Hopefully, this will help you out. I can't tell you how much time I wasted every night for the last 9 days working on this. I may just drop the issue and accept a 2.8 OC and enjoy some gaming for the time being.