The 12+v rail is a bit low for your system. 24a is recommended with a singel power in vid card for stable OCing.
I saw you got the HTT ahswer in your other thread
As said.. reduce the LDT (Memory Controler) multiplyer.
As you OC you may need to increase the LDT's voltage along with the nForce chip.
You also seem to be getting high CPU temps... with that XP-120 something is a miss because it should do very well to keep the CPU cooler. A reseat and reapply AS5... the AS5 may be excessive... use very little, just a very thin film and dont spread it with your finger, use something plastic.
I saw you got the HTT ahswer in your other thread

As said.. reduce the LDT (Memory Controler) multiplyer.
As you OC you may need to increase the LDT's voltage along with the nForce chip.
You also seem to be getting high CPU temps... with that XP-120 something is a miss because it should do very well to keep the CPU cooler. A reseat and reapply AS5... the AS5 may be excessive... use very little, just a very thin film and dont spread it with your finger, use something plastic.