This is so obvious as to be painful. If one stick always shows as 512MB and one stick always shows as 1GB, then IT'S THE STICK OF RAM.
it's not always the same stick of ram when i look at cpuz, but like i said above i don't know how accurate that is. it's always the same stick if i put them in separately though so i guess mem is the culprit, not the mb.
One more thing: if you're playing games on this PC, you'd see a big improvement with 4 GB compared with 2 GB. Read this:http://www.bit-tech.net/hardware/2008/07/08/is-more-memory-better/5
i went ahead and ordered a new processor, ram, and graphics card. i'll rma the gskill and end up with 4gb total once i get it back.
ps. if you don't hear from me again you'll know it was the motherboard. :sharpens knife: