New
#1
Very high DPC latency in Windows 7 x64 caused by storport.sys
Hello all - hoping some real experts can shine a light on this one.
Installed a brand new mobo - Asus Sabertooth 990FX - and DPC latency checker was showing full red. Used Latency Mon to track down the culprit which was storport.sys. Searched everywhere for a driver update for storport in Win 7 and nothing exists.
Then went further and installed Windows Performance Toolkit and ran the Performance Analyzer to look at what was going on with storport. PA showed that the "RaidAdapterTimerDpcRoutine" was causing storport to spike so badly.
I'm not running any RAID drives - they're all set to AHCI in the BIOS, so I'm at a loss what to do next. All latest drivers & updates are installed. Are there RAID related drivers I can disable from device manager? Or switches in the registry?
Setup:
Windows 7 x64 SP1
Asus Sabertooth 990FX mobo
AMD Phenom II X6 1090T black edition CPU
8gig ram
Cheers,
Davros