I just recently started experiencing bad frame rate issues in Source games. I installed Windows 7 Home x64 about a week ago and at first things were fine. Then out of the blue (about two days ago) I started experiencing horrible frame rates in TF2 and Zombie Panic Source. I was getting about 15 FPS or less according to the game but it felt even worse than that.
It seems to be a network issue on my end. I tried installing the latest driver
for my NIC and that fixed the problem until I rebooted and found the problem was there again. So I ran the setup for the driver and chose repair and it worked again...until I rebooted. Then I found that just going into the network and sharing center and the change adapter settings section that if I disable and re-enable my network it fixed it again. I have to do this every time I reboot. It's not that much of a problem since disabling and re-enabling the network only takes a few seconds but it is frustrating not knowing what is causing this. Does anyone have any ideas?
4GB RAM G.Skill DDR2-1000
Nvidia 8800GT 512MB
onboard Realtek HD sound and Realtek 8111B NIC