Since upgrading to an i7 2600K and a GA-P67A-UD7 a few weeks ago, I've been getting occasional hard locks during usage. I haven't been able to identify a common trigger, seems to occur randomly. I upgraded to the latest F7 BIOS, which made the lockups rarer, but I'm still getting some locks.
Locks occur about once every 24-36 hours, though sometimes things go OK for 72 hours+.The locks occur at all different times of day and I can't find a common cause, they happen when I'm just browsing, using a VM, or when the computer is idling. I have not turned off C1E or EIST, I will reboot shortly and see if disabling those fixes anything. I have not overclocked the processor. Most BIOS settings are default; the RAM voltages were auto-detected to the recommended settings (I have 16GB of G-SKILL Ripjaw). I am using AHCI on all disk controllers.
I've run memtester overnight and didn't have any issues. I do lots of intense processing all day and that doesn't seem to trigger any issues either; the lockups have usually been at times of relatively little activity, like when I'm just browsing a web site.
I've noticed two types of hard locks. Occasionally all the lights on my devices stay on, but occasionally they all turn off like the USB ports have been powered down. That's the only difference I can see between the locks.
When my computer comes back up, the clock is usually reset 5-6 hours back. I am in a UTC-7 and the hwclock is set to localtime. I use openntpd to reset the clock. My logs also show that openntpd is making regular adjustments of skews that are ~9 seconds. Other than that, there is no unusual output on the logs.
I am using the 6Gbps SATA controllers due to the issue with the 3Gbps SATA controllers. There doesn't seem to be a correlation to disk activity.
