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My PC goes into endless reboot loop after filling all RAM slots. There's no POST screen nor audible error code. After powering on, it takes ~15s before it shuts down and powers on again.

Until recently, I had 2x Corsair CMK32GX4M2A2400C14R (v5.30) configuration and system worked well. Now with the second pair of CMK32GX4M2A2400C14R (v8.31) and therefore all slots filled, system goes into this endless reboot cycle.

If I read the manual right, presented configuration should be fine. How can I troubleshoot the problem? Or maybe I am just doomed to a single RAM pair?

Important remarks:

  • All memory slots are fine
  • Both memory pairs are OK (tested)
  • Clearing CMOS with jumper did not help

Relevant hardware:

  • Mobo: Asrock AB350 Pro4 v1.01 (BIOS 5.40)
  • CPU: Ryzen 1700X

EDIT: Below you will find the specs from AsRock for Summit Ridge family (where Ryzen 1700X belongs).

enter image description here

Lukasz Tracewski
  • 125

1 Answers1

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According to the tech support of AsRock the most likely cause, with no remedy, is the version difference between the modules that likely results in different chip and / or layout. Full answer:

different revision/versions of memory modules can give problems. We suggest to use 4 identical modules. Your modules have ver 5.30 and 8.31 Seems like the different versions have different chips and/or different layout. So they might not work together at all. Better check with Corssair. Also we do not have same memory modules tested and shown in our memory QVL – we had only tested the CL16 modules. Yours are CL14 https://www.asrock.com/mb/AMD/AB350%20Pro4/index.asp#MemoryPR

Lukasz Tracewski
  • 125