Z170 Extreme4 with G.Skill F4-2800C15D-16GVRB kit

D32_bobjob wrote: Hi, bought this together with a i5-6500. As soon as I put a module into one of the A*-slots the board does not boot, it cycles 00-19-00-4C. If I put them into the B*-slots, they work at least in single channel mode. I know that this module is not in the compatibility list(while buying it I got this instead of F4-2400C15D-16GVR by accident).  Is there a chance that the modules will work any time soon after a BIOS update(no problem playing Beta tester) or will I have to get new ones? Greatings

What UEFI version are you using now? The latest is 3.40 dated 7/25/16:

http://www.asrock.com/mb/Intel/Z170%20Extreme4/?cat=Download&os=BIOS

ASRock is trying with their recent Z170 UEFI updates to increase compatibility with more DDR4 memory. But given the differences between Skylake and the Haswell-E and Broadwell-E systems, the only two so far that use DDR4 memory, that is not easy.

I cannot predict or have information if your memory model will at some point become compatible. Frankly, this memory can be used with other manufacture's Z170 boards according to G.SKILL.

So far, all DDR4 DIMMs of 8GB or greater capacity are Double Sided (DS) types. DS memory should be used in the A1 and B1 slots.

I assume this memory won't POST with Auto settings in the UEFI? You could try clearing the UEFI with them installed in the A1 and B1 slots.

Another thing to try is, if you can get into the UEFI, in the DRAM Configuration screen, at the very bottom find the MRC Fast Boot option, and set it to Disabled. That will cause memory training to be done during POST, which may help with compatibility. Also be sure to let the memory start at its default speed, which is 2133.

parsec wrote: Another thing to try is, if you can get into the UEFI, in the DRAM Configuration screen, at the very bottom find the MRC Fast Boot option, and set it to Disabled. That will cause memory training to be done during POST, which may help with compatibility.

parsec, being the AMD Fanboy I am(yea yea Keep it to yourself  ) i have to ask.

In disabling MRC Fast Boot, does this also disable/negate any/the XMP Setting one may have arranged in the BIOS?

wardog wrote: parsec wrote: Another thing to try is, if you can get into the UEFI, in the DRAM Configuration screen, at the very bottom find the MRC Fast Boot option, and set it to Disabled. That will cause memory training to be done during POST, which may help with compatibility. parsec, being the AMD Fanboy I am(yea yea Keep it to yourself  ) i have to ask. In disabling MRC Fast Boot, does this also disable/negate any/the XMP Setting one may have arranged in the BIOS?

If it did disable XMP, or reset any memory options, I am not aware of that. It should not do that, no reason as that is not the purpose of this option. It doesn't do it on any of my boards that I have set it to disabled.

If it did disable XMP, etc, that is a bug IMO.

After a few boots/restarts, MRC Fast Boot should be able to be reset to enabled, although I have seen cases where it seems to like being left disabled.

So AMD boards don't have this option? It's not an Intel thing AFAIK.