Motherboard Only Recognizes 3 out of 4 RAM Modules

[Selym]

The RAM I am using is Mushkin Blackline 4X8GB DDR4 2133 12-12-12-35 1.2V 994197F and the motherboard is an ASUS Sabertooth X99. The system boots and runs properly, however only three out of the four installed modules are recognized by the BIOS and Windows. CPU-Z recognizes all 32GB. I have the memory installed in the beige slots and I've swapped the modules around and found that they all work properly. ASUS support told me that the RAM is incompatible with their motherboard since it is not on their qualified vendors list. Can anyone confirm that it is not compatible? Thank you.

 

[Paul NZ]

The ASUS site for the mobo will tell you whats compatible. or whats been tested

Altho ASUS should know what is or isnt !

 

[Selym]

Turns out it was just a bad memory module.