Let me start by saying I used to fix PC's and this one has me stumped so now I must humble myself and turn for help.
I had 4x 512 DDR 400 ram stick in my MSI K8ngm2 mobo, I wanted to get more bang on the RAM side and bought 4x 1GB DDR 400 sticks, installed the RAM as I have done thousands of times and to my surprise the monitor stayed black no connection signal. I Pulled the GB sticks out and put one 512 in the DIMM 1 slot perfect startup then tried an alternating config 1x512 DIMM1(green slot) and 1x1GB DIMM2(purple slot), here is where it gets worse the screen came on I went into BIOS settings and only the 512 stick was being recognized. So what the heck am I supposed to do now? The mobo supports the ram according to MSI product site "MOBO Specs Here" I checked the DIMM configs (did I read them wrong?), and as additional info I am running a 500W PS so that should not be an issue. Do i need to adjust the voltage settings perhaps? or are my GB modules just hosed and I should contact the supplier for warrantee replacement? Any help would be great, as I have no clue right now. Maybe I overlooked something simple who knows. Thanks.