After putting those new ones into yellow slots, it will not post at all. I have checked those rams in orange slots (I took the old rams out) and it boots up fine. So they aren't defective.
The old rams' spec are:
OCZ DDR (PC3200)
2 GBs (1 GB per stick)
I checked with my bios and it seems to be up to date (4/6/2006). Did anyone have success in getting all 4 GB rams to work on this mobo? Maybe I'm missing something? Let me know if you want more details.
-- You may have to increase the northbridge voltage in the BIOS. When those boards were built there were not many people using 4 sticks of RAM. Enter the BIOS and bump up the northbridge voltage in the increments available, one increment for each attempt.
-- If you still cannot POST and boot, bump up the RAM voltage in the BIOS. Try bumping it up in the increments available in the BIOS, one increment each attempt.