RAM Slots Randomly Stop Working

[darkalex175]

SPECS

CPU: R9 3950x

Motherboard: ASRock x570 Steel Legend WiFi AX

RAM: Corsair Vengance RBG PRO ( 4 x 16, 3200MHz)

GPU: ASUS GTX 980 TI STRIX

Boot Drive: Seagate FireCuda 520 M.2 2280 500 GB

Storage Drive 1: SanDisk SSD Plus 1TB Internal SSD

Storage Drive 2: Silicon Power 240GB SSD

Power Supply: EGVA SuperNOVA 850G+, 80 Plus Gold 850W

 

Issue:

Came back to computer and noticed it blue screened and crashed, and tried to restart. Could not find within "Window's Reliability History" any record of the crash. The computer could not automatically restarted, so I hit the power button and it booted into the BIOS with the message "PMU Memory Training Error" for some of the Slots. Upon entering the BIOS it simply does not detect RAM in Slots B1 and B2. Yet, the RBG component on the RAM is still illuminated and pulsing just like the good Ram. What seems strange here is that having already had to RMA two sticks of RAM already, it seems unlikely to be memory issues again. To build on the my idea that it is not the RAM again, the sticks in those slots came from different packages. Finally, when I had RAM issues before the RMA, the Computer would simply not post due to the presence of bad ram, while it fully boots into Windows now. I am simply perplexed as to why the RAM would seemly just be not detected by motherboard after working fine for two weeks. Any ideas would be great, and let me know what other helpful information I could provide. 

[Blacksmith121212]

Bios Update?

Bad motherboard?

[bmx6454]

could try cleaning out the slot with some keyboard cleaner, i would agree that it seems unlikely that  the ram failed again, but it is still definitely possible. the rgb would still be working, as far as i know, power isn't cut to the slot even if the board is having issues with it. the easiest way to diagnose this issue would be to test all your ram in another pc, and or testing different ram in each ram slot on your pc.

[darkalex175]

3 minutes ago, Blacksmith121212 said:

Bios Update?

Bad motherboard?

BIOS is the most up to date available for the board. Could be a bad motherboard, but that might be beyond my ability to test at the moment.

 

2 minutes ago, bmx6454 said:

could try cleaning out the slot with some keyboard cleaner, i would agree that it seems unlikely that  the ram failed again, but it is still definitely possible. the rgb would still be working, as far as i know, power isn't cut to the slot even if the board is having issues with it. the easiest way to diagnose this issue would be to test all your ram in another pc, and or testing different ram in each ram slot on your pc.

That was my next test was to see if any of the RAM was actually dead by testing 2 sticks at a time to see if any actually is dead. 

Good to know on the RBG being on no matter what. I learned something. 

[Blacksmith121212]

8 minutes ago, darkalex175 said:

 Could be a bad motherboard, but that might be beyond my ability to test at the moment.

 

 

If it is in warranty, you could RMA the motherboard and get a replacement