Still having ram problems

So a while ago I posted about having problems with a gskill, so then I rma it and put the kingmax back in, but I'm still getting errors a lot less but still getting them, so I flashed the NF7-S back to abit's bios, and set the fsb back to 200mhz, and I was still getting errors where I wasn't before, I had to raise the vdd and vdimm to be errors free. So I wanted to know what you guys think the problem might be originating, I'm gessing the mobo but I heard how that abit is not a good manufacturer to deal with.

oh let me link to the other thread, just a minute

edit: here it is http://www.ocforums.com/showthread.php?t=381995

Here is an update, I check the ram on my backup pc and it works just fine, ran memtest without any errors. I have run this setup for months and never had a problem until I put the gskill in, so I took the mobo out and checked the hs on the nb and it was barely making any contact at all, could that be causing the problem?