I have the following in a new build:
# Antec 902
# GA-MA785GMT-UD2H
# CPU HDZ550WFGIBOX Phenom II x2 550 Black Edition Callisto 3.1GHz
# G.Skill 2GB x 4 F3-10666CL8D-4GBHK
# HDD WD Caviar Black WD1001FALS 1TB
# Antec EarthWatts E650
# DVD Burner SH-S223L
# Windows 7 64bit
Whenever I add more than one module of ram the system crashes, becomes unstable, BSOD (Page_Fault_in_nonpaged_area, PFN_List_Corrupt). Thinking that the memory controller might be bad in the Phenom II, I ordered an Athlon II Quad Core 630. Does the same thing. I have tried the individual modules in every slot and they work fine. However, when I add another stick everything goes bad quickly. I have tried the modules in the same colored slots, nothing. I have tried one in channel 0 and one in channel 2, nothing - it begins crashing. It goes to the Windows Starting and then the four images come together like it is starting up but then it crashes.
This is my first build and I have very limited knowledge regarding the settings in the BIOS. I have been doing as much research as I can but I am at a complete loss. Any help or guidance would be greatly appreciated. I don't know if I should keep the Phenom II or the Athlon II? The memory was on the compatibility list for the mobo. Help please.