I have a 8RDA+ motherboard. I was running my 1700+ at 215x11with hyperx 3500 ram and no problems at all. I noticed there were a lot of people having problems with hyperx running dual channel at speeds over 200fsb. I called newegg and asked I could exchange it for corsair because of this issue. They said no problem even though I had bought the ram 3 months before. My corsair 3500 ram that I got would only do 21fsb stable. I just got another stick and that stick does 215 stable like the hyperx. I guess all ram is not equal.