I just bought another set of Memory sticks and now... I Can't seem to get the 4th memory dimm to reach its rated speed of 1600, forget about Overclocking. I can only get it to 1567 any higher and it would only post 6gb, when I install one memory stick on only the 4th dimm slot and set it to 1567mhz, sometimes it would boot, sometimes it wouldn't and definitely wouldn]t boot on 1600mhz If I install all the memory and set it to 1600mhz or even say... 1570mhz the post would only check 6Gb, but the bios Memory-z still detects the 4th stick as present, and would be detected by windows system properties as 6gb usable (8gb installed), fiddled with the DRAM voltage too +/- still the same, so... does Anyone have a solution short of RMA? the warranty expired a month ago (dough...) Help...