"Fitz" wrote in message
...
Does the bios on your notebook allow you to increase the voltage? If so,
check out the operating voltage of your RAM (i.e. 2.5-2.8v). Increase the
DDR voltage in increments until the system stabilizes.

I had the exact problem with 2 X 512MB sticks of Mushkin PC3500. Either
one
ran fine, but both would lock up or reboot. Increasing the voltage from
2.5
to 2.7 cured the problem completely.

Statement of the obvious: Do not exceed the max operating voltage of the
RAM.

Good Luck,
Fitz



Thanks, Fitz, but no such option in my BIOS settings.