Dual bios

Welcome to Tom's Forums!  

Which GA MOBO? Which slots are the RAM installed? Please list all RAM part-number and/or preferably a link.

2 short: CMOS setting error

Try to Clear CMOS.

This is a common problem. The cause is that four modules place a greater capacitive load on the busses and reduces the effective speed of the memory chips. The solution is to increase the memory voltage in the BIOS. Sometimes this doesn’t work and you will need to reduce the memory timings as well.

DDR2 or DDR3. Dual channel or triple channel. Must be dual, if you have 2, then add 2.

Are all the memory sticks exactly the same?
Same rating? (i.e. DDR3-1333, or DDR2-1600)
Same capacity? (i.e. 4 x 1GB sticks)
Same CAS Latency? (i.e. CAS 9)

Installed in same colored slots? (i.e. 1 & 3 blue, 2 & 4 white)

Try resetting the CMOS as stated.