Originally Posted by 2thAche
Just looking at your BIOS, you've set the RAM multiple to get 1333 at stock FSB, but you've overclocked your FSB.
Your RAM is probably failing. When you raise FSB, the RAM speed raises with it. You can check with CPUz to see what speed it's at when you hit desktop, but you need to set a lower RAM mutliple to keep it within specs.
At 400 Mhz FSB on CPU, RAM is 1333Mhz (this is why it was stable). AsRock has jumpers that can set it up:
"When you mount a FSB800 or FSB1066 CPU, and try to overclock to FSB1333 or
FSB1600 (by BIOS setting) you may face the problem, that DRAM frequency will be
overclocked very high. Please use jumper to force NB to be strapped at higher
frequency, so the DRAM can work at lower frequency."
But in one way you are right: when I went to over 1333 Mhz on RAM... it went unstable. With every timing, with every voltage.