I ve been having the same game stuttering problems .Sometimes i even had complety hang(crash) followed by repeating sound or even cold boots,with my new opteron 165 0551 WPMW.All these in multihour dual prime stable-snm conditions.
Hotfix certainly made things much better.I also found out that errata options are quite relevant and should be set to auto to be 100% sure dual core cpu doesnt have cache access problems.By the way i cant explain why MS doesnt autoupload, with this critical in my opinion hotfix,in their online update service.My best guess is that its beta still and thats why it doesnt fix completely the problem.
Today after playing a few hours online CoD2 and single player Q4,FEAR i found this stuttering problems been somehow related to xplosions or hard swap file accesses.Anyone else that has observed any of those things too?
BTW the rest of my rig is a DFI SLI DR EXPERT,2x1GB Ballistix Tracer still Alive :banana: 2x74GB Raptors on RAID0 and a xfx GTX 256.Also i have an xfi xtrememusic on 1 pci and would like to know really before i put an old ZS to test too if someone has seen the same effect with other onboard or mount Sound card to be 100% sure its not the classic xfi release bug with nf4 chipset stability issue.