Highest @ 277MHz workable.280+ for Mem can not start windows and sometimes needs clear CMOS, 279 can go in but the login windows fails, 278 can login but memory testing fail. for both 278&279, they fail at BSOD and tell me the memory management errors. 277 can do most of the things, but not stable. conservative setting is 275Mhz(2 Mhz less than the 277) at this time, even can use 2.5-4-4-7 aggressive timing. at this speed in my rig, it is stable and can pass the prime95 memory test but the cpu will fail after around 1 hour. when playing games, the nv_disp.dll error will come out.@ 273Mhz(274 Skipped) can pass both cpu and mem prime95 test (more than 5 hours testing for both). even so @270 game is always a headache due to the nv_disp.dll. conclusion and analysis: (1)so far this board can only support 2.8v for mem, in the future if in any chance 3.1v is provided, it is very likely that the mem can run @290Mhz with 3-4-4-8(maybe a little cooling needed). (2) the possible reason why game always trouble the syste (more...)