Hi, just this evening i was playing a game and my audio started stuttering and my FPS dropped, i checked Task manager real quick and saw very high CPU usage coming from "System interrupts". After some quick searching i now understand that this is usually a driver related issue, and an awesome tool called dpc latency checker can find the culprit. Unfortunately it does not yet work on windows 8, as many people with a similar issue eagerly wait to find a solution.

I tried doing it manually following some various forum guides, but ultimately got stuck and could not find the problem. If anyone could help me isolate the issue i would greatly appreciate it.

It is worth noting a couple days ago i stopped using my Marvell Sata controller drivers, and reverted to the standard ones (needed to update my SSD drivers to fix another windows 8 error DPC_Watchdog_Violation). Since then i have had no more BSOD's and everything was running smooth, even while playing games yesterday and today, but it wasn't until seemingly random tonight i got the issue.

I am using a custom built desktop so no OEM info there, but please let me know any other information that i should include, or diagnositc logs i can produce.