well, sometimes my pc freezes (blue screen), is very rare but but it occurs, so i decided to run memtest because my memories is the only "unknown" brand in my build, i got 8 errors at the 400% coverage, the memory is 800 mhz but at first was at 533 so i tweak it on the bios following the timing table on cpu z, i don´t know what to do because i don´t have prblems using the pc but ... well need some advise here