Update: Ok, so i got 3GB of ram working by changing a couple of bios settings. I changed my Ram voltage to 2.1, set my cas latency to 5 and i enabled unganged ram. This allowed me to boot with 3 GB of ram.

However whenever i turn my computer on with all 4 GB in, it just stalls before it even gets to the first screen. My computer parts start making noise, but it just stays at the black screen as if my monitor just turned on then froze.

My mobo is the: Asus M3A32-MVP Deluxe

The two Types of ram i have are:

(older ram)
OCZ Reaper Dual Channel 2048MB PC8500 DDR2 1066MHz Memory (2 x 1024MB) run at CL 5-5-5

and

(newer ram)
OLYMPUS Reaper HPC 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory run at 5-5-5-15

I have tried 3GB at a time with both sticks of the new ram, but as long as i don't hit 4 GB i can boot.

Everything i can find out about this mobo says that it supports up to 8 GB of ram.. maybe im wrong though

Thanks for replys, hope you can help some more with these updates.