New
#1
Still having bad DPC latency, have tried disabling LAN, USB, etc.
I submitted a thread here a long time ago regarding DPC latency issues, as well as to tomshardware.com. Nobody has replied.
I've been having DPC latency problems and the main symptom is system stuttering, with sound crackling and mouse skipping. A DPC latency checker program shows huge red spikes. This problem seems to start happening when I'm in a game (possibly fullscreen-only, I haven't tested a game in windowed mode). However, once it starts, it usually doesn't stop until I reboot, even if I close the game. If I keep playing, eventually it leads to a BSOD. If I close the game, the latency drops, but it never goes back to normal.
When it happens, I've tried disabling devices one-at-a-time in device manager. LAN, USB, mice, etc. Nothing works so far. I haven't been able to test the sound card as it requires a full reboot for it to be disabled and rebooting usually gets rid of the problem for a while. Same thing with disabling my graphics card.
I have no idea what's causing the problem and there seems to be very little information about diagnosing DPC latency problems on the web, or at least I'm not very good at finding that info.
My system:
CPU: Core i7 920
Motherboard: ASUS P6T
Video: EVGA GTX285OC
Memory: 6GB OCZ
Power: 850W
OS: Windows 7 64bit