I don't understand why would it be a bad flash, I did not flash them when the computer crashed.... I flashed them a while back and they were running OK for quite some time. The problems began when I reinstalled windows and computer crashed in the middle of the night.

Anyway with OC bios, system does not boot up at all. I tried to boot them up with silent BIOS, than switched to OC bios while computer was running and flashing it. Flash succeeds, but computer does not start up, no matter which OC bios I use (stock, 1500 memshift, 1750 memshift).