CMX16GX4M2B4266C19R doesn't run at rated specs with Asus ROG STRIX Z370-G

I purchased a Corsair Vengeance LPX kit (CMX16GX4M2B4266C19R) from Newegg last week for a new system build. This kit is paired with an Asus ROG STRIX Z370-G mobo (BIOS 0419). The XMP profile has it listed as DDR4 4266MHz, 19-26-26-46 @ 1.40V. I have found that my system fails to boot with any DDR4 frequency options selected that are above 3600MHz, 19-26-26-46 @ 1.40V.

 

Is this a known issue with this kit and mobo combination? Any other Asus ROG STRIX owners out there having similar issues with Vengeance sticks?

First off: The memory is probably not the issue here. The Asus Strix Z370-G Gaming is only rated for up to DDR4-4000 by ASUS and you might already have to make manual adjustments to reach that.

 

If you have a stable setting for DDR4-3600, check performance and make some screenshots that include the sub-timings (via MemTweakIt or ASRock Timing Configurator). Then step by step try for DDR4-3733/3866/4000 with slight adjustments in tertiary timings and VCCSA/VCCIO until you can reliably POST and pass stability tests with those settings. Your kit probably doesn't even need a Vdimm of 1.40V for any of that, unless you also tighten the primary timings.

Doh!

 

Thank you for pointing out that the Z3730-G's specs do not support anything higher than DDR4-4000. I was getting this board confused with the Z3730-I, which supports up to DDR4-4333. This certainly explains a few things! I was assuming all the STRIX Z3730 boards supported DDR4-4333, but clearly that's not the case. My bad!

The two memory slot models can support a higher max memory frequency by design, that is why even the ATX ASUS ROG Maximux X Apex only has two memory slots.