Take the 2-minute tour ×  I have a system with Motherboard: ASUS
P8B75-M and 4 memory modules: Geil 8GB DDR3-1600 9-9-9-28 (link)
Unfortunately, BIOS (the latest) recognizes the memory as
DDR3-1333 9-9-9-24.  I tried both BIOS default settings and
manually entered DDR3-1600 9-9-9-28. In both cases the system
looks somewhat unstable (according to memtest86+).  In the BIOS
besides these 4 numbers with main memory timings there are
dozens of other timings. I guess that I should set them as well
to get a stable system. Could anyone help me, what to enter
there?  share|improve this question You may need to set the
voltage manually for that, which is inherently risky. Though,
the link you provided suggests that they are safe up to 1.5v (as
the normal voltages). Now - can you make it to Windows with your
manual timings (even though it looks unstable)? If so, check the
voltages with CPU-Z to see what they are operating at with your
manual timings. Edit: Looks like Chris may have a good idea for
your specific RAM. – 