just want to get this straight, what is the supposed gain switching from 1. bios HPET enabled, useplatformclockset true, C-States enabled. to 2. bios HPET enabled, useplatformclockset true, C-States disabled. should it lower latencies when gaming (at max freq.) ? because if we're talking idle alone, I rather keep the C-States enabled, regardless of how minimal the lower CPU volt/temp gain actually is. BTW, this thread reminded me to take another look at DPC latencies, and apparently I was getting a 1000us spike every 5sec constantly, along with ESET NOD32 process spiking (low) cpu usage. LatencyMon concluded it has to do with Intel (IAStore) & nvidia drivers (also mentioned cpu power-saving features), but since NOD32 statistics kept listing some Raxco's PerfectDisk file, I gladly solved this mess by disabling PD's services. no more spikes and now LatencyMon agrees my system is top notch for the record I use Intel SSD for main OS, another onboard mSata Intel SSD accelerating a velociraptor via SRT, plus 3 more WD drives. While admittedly I don't recall suspecting latency problems on a daily basis, this behavior didn't seem limited to idle state, so I'll drop the on-the-fly ssd aware gimmicks and stick to good old on-demand defrag, which I barely need anyway.