It's great that you're doing all this testing... >> I disable sound recording...I couldn't see any freezes at all >> only with external input, and no Windows sounds...game is fluid >> 720p with all sound on...I did get freezes Hmmmm >> it seems that Fraps doesn't really sync it at all - video is slightly late at the end of the recording OK now I really think it's audio clock related. Try these tips - pulled from the Audio sync thread: Reinstall video driver. Reinstall sound driver too. Reinstall chipset driver for your motherboard. Set Windows Power Properties to "High Performance" Disable Asus AI Suite and the EPU Engine Set sample rate to 48000 Hz. Use another sound card. Get a USB headset. (or USB microphone) [most popular solution] Don't overclock the Front Side bus. (CPU/GPU overclocking should be OK) Disable Spread Spectrum Bus Clock uninstall "Easy Tune 6" (post #126) [another clock-changing program!] Good luck!