Hey everyone, I need some help here! I've had my setup running smoothly for a long time without issues, but I've started facing a strange problem recently. My motherboard is the ASRock B450 Steel Legend paired with a Ryzen 7 5700X, and I'm using four DDR4 DIMMs rated at 3200 MT/s. Normally, it would boot and run fine with all four sticks, but now it keeps reverting the memory settings to 2666 MHz after any hardware change or even a full power cut. What's worse, if I try to boot with all four sticks, it fails to POST entirely and enters a boot loop. The only way to get it back up is to remove two sticks, clear the CMOS, and then manually set everything again. I've replaced the CMOS battery and updated my BIOS to the latest stable version, but I'm still stuck. I'm hoping to get some insights on whether this is a common issue with my motherboard/cpu combination, if there's a BIOS regression causing this, tips for stabilizing the memory voltage, or if I should consider getting a new motherboard altogether. Thanks in advance for any advice!
2 Answers
I had a similar situation on my ASUS X470-PRO with a Ryzen setup. I started getting errors with my RAM, and after running the Windows Memory Diagnostic tool, I found one module was malfunctioning. It’s worth trying the diagnostic to check for any issues with your memory too.
It’s curious that it worked before and now doesn’t. Have you tried booting with the speed set to 2666 MHz and then manually overclocking to 3200? You might find guides on YouTube that could help with a safe tweak. Sometimes it just needs a little push!

Good point! That’s a solid idea. I’ll try running the memory diagnostic to see if there are issues with my modules. I really appreciate the suggestion!