After overclocking my i7-920 from 2.67 GHz to 3.8 GHz, I've noticed that my system has become extremely unresponsive; particularly when trying to access the HDD it would seem. My system specs are:
CPU - Intel i7-920 (Bloomfield)
Motherboard - Asus P6T
RAM - Corsair XMS3 (3x2GB)
Heatsink - Thermalright Ultra-120 extreme
HDD - WD Caviar Black 1 TB and 2 TB, 7200 RPM
Gfx Card - Nvidia GTX 570
BClk is at 190 MHz, with a 20x Multiplier and VCore at 1.2875V. It's stable in memtest86 and in prime95 for in excess of an hour. Any idea what could possibly be causing this? It's certainly worrying when an OC causes your PC to slow down...
let not get ahead of ourselves and waste time and effect, just save your settings or write them down, the restore the defaults. see if there is a difference. use you comp for a meaningful amont a time doing what you do.
Done some benchmarking using 3DMark 06, Vantage and 11; in all 3 cases the observed CPU scores were considerably higher than those at stock (e.g. 20826 vs 15695 in Vantage) - ruling out the clock speed being lowered or throttled due to temperature.
Interestingly, the hard drive read and write speeds were virtually identical between stock and OC, yet accessing the hard drive with OC frequencies runs like molasses. Are there any voltages or speeds which could be having a knock-on effect to SATA or the HDD controller?
EDIT: Putting the system back to stock frequencies causes everything to load at the correct pace, however I'd like to find a way to keep my overclock and get everything to load at a sane rate.