I recently upgraded my CPU from an AMD Ryzen R5 3600 to a Ryzen R5 5500X3D, and now my computer won't post when I use the A2/B2 RAM configuration. Before the upgrade, everything was running smoothly with the 3600, using DOCP settings at 3200MHz (CL16). However, now I can only get the computer to work with the A1/B1 slots at a stock speed of 2133MHz, which doesn't enable dual channel. I tried reseating the CPU and checking for any bent pins or thermal paste obstructions, and the RAM sticks are still functional as I was able to post with them individually. I suspect the issue might be with the motherboard, the CPU's memory controller, or the need to clear the CMOS. What could be causing the A2/B2 slots to fail?
2 Answers
Hey, I tried testing my setup with the old 3600 in the A2/B2 slots as you suggested, but it still wouldn't post. So I'm leaning towards it being a motherboard issue now. What do you think?
That’s rough! Let me know if you decide to replace the motherboard. It might be worth checking if it’s still under warranty.
If you still have the old CPU, I recommend testing with it first. If your RAM works fine in the A2/B2 slots with the 3600, it might point to the X3D having a weaker memory controller or possibly motherboard damage. It’s pretty rare for RAM sticks to fail, so I’m leaning towards a motherboard issue if the RAM is fine with the other CPU. Also, after a BIOS update, I had to make slight voltage adjustments to my setup. Let me know how the tests go!
You could try resetting the CMOS by unplugging the PSU and holding the power button, or by removing the CMOS battery. That might help clear any settings causing the issue.
Good call! I still have my old 3600. Just need to get some thermal paste first. What specific voltage adjustments did you make?
Sounds like it's leaning that way, yeah. If both CPUs aren’t posting in those slots, there’s likely some damage to the motherboard.