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I built 4 identical PCs with Ryzen 7 2700 CPUs, but one will not post with 2 sticks of RAM

Question asked by bitpix3l on Jan 6, 2020
Latest reply on Jan 7, 2020 by cosmicdance

I built four new office PCs for my work(graphics work, which is why they are a bit more beefy than standard office PCs), and three of them are working perfectly. These are M-ATX mobos with only 2 RAM slots. However, one just will not boot when I install 2 sticks of ram. It works totally fine with 1 stick installed, but won't even get past BIOS when i install a second stick. 


I thought maybe it was a compatibility issue, but again I built four identical PCs, and only the one is having trouble. The other three are working, and are awesome! Really loving this Ryzen CPU. It is already proving to be a work horse.


I thought maybe it was a bad Dimm slot, so I returned the MOBO and installed a replacement today. Same issue. 


I also tested both sticks of RAM by themselves, and both work fine when 1 stick is installed. Also, doesn't seem to matter if it is in Dimm 1 or 2, it just doesn't like the second stick.


Specs are:


Mobo: MSI A320M Pro-M2 V2

CPU: Ryzen 7 2700

RAM: Ballistix Tracer DDR4 3200(8gb x2)

PSU: EVGA 500w 80 plus

SSD: Samsung EVO 860 250gb

GPU: Radeon HD 5450 2GB


Since I have troubleshot everything else, my gut is saying this CPU may be having issues. Does anyone have any ideas? I've been fighting this thing for a week now, and its driving me nuts. 


Thanks for any help you guys can offer.