Guyz, I have problem here wif my rig..I have it overclock kaw2. I test ORTHOS for a couple hours and it ok. But if I turn off for a long time, once I switch on, it won't boot, need to hard restart and then it will boot, but won't POST. Need to restart again, go in BIOS, then save the BIOS setting(without any changes) then it'll reboot then goes in windows like normal. Y is it become like that?

My spec

Asus P5N-D
C2D E8200 @ 3.9GHz w DeepCool Ice Tower max loaad with ORTHOS for 2 hours @ 59*C
OCZ SLI Ready ram 2 GB @ 975MHz 5-5-5-15 timing
Galaxy 9600GT OC @ 775/1805/1150
Enermax Liberty 500W DXX
2 HDD
1 DVDRW

Once it restarted normally, no stability issue occur, but the first boot gimme such problem. Playing Crysis for 3 Hours straight without having any issue at all. But Y?

This is my bios setting

CPU Config - ALL DISABLE

FSB - 1950
MEM - 975

Voltages
VCore = 1.40000V
Vmem = 2.21
HT = 1.44V
NB = 1.44V
SB = 1.52V

Memory Timing

5-5-5-15 Other set to auto...