Hey everyone, I recently upgraded my PC with a Ryzen 7 9800X3D, an MSI MPG B850 Edge WiFi 7 motherboard, and Kingston Fury 5600 CL40 RAM, which cost me about €250. I'm facing a problem where enabling A-XMP Profile 1 (5600 MT/s CL40) in the BIOS makes my system unstable—it freezes and randomly reboots. Surprisingly, when I switch to Profile 2 (5200 MT/s), everything runs perfectly. I've updated the BIOS to the latest version, but that hasn't fixed the issue. My main focus is on achieving maximum stability without crashes, but I also want to optimize my performance. I'm wondering if there's a way to get the 5600 MT/s setting stable, and if not, how much performance I'd be sacrificing by sticking with 5200 MT/s in terms of daily tasks and gaming. Thanks for your help!
3 Answers
You could try sticking with Profile 2 and manually changing the speed to 5600 MT/s in the BIOS, but honestly, the performance difference between 5200 MT/s and 5600 MT/s is minimal. With the Ryzen 7 9800X3D, it really doesn't impact performance much. Instead, focusing on lower latency RAM like CL36 or CL30 might be more beneficial for your setup.
While it's an exaggeration to say RAM speed doesn’t matter with x3d processors, your RAM might be faulty if it's failing at the advertised settings. For the price you paid, that’s definitely a concern. Just to be safe, keep in mind you may not always be using the x3d CPU in the future, so you want reliable RAM.
I ran memtest86 with four tests and got no errors at 5200 MT/s. Is there still a chance my RAM could be defective?
If activating that profile is causing instability, you might want to manually tweak the settings in your BIOS. It could help to get some advice from overclocking communities. Alternatively, running your RAM at 5200 MT/s is probably just fine; you'll hardly notice any difference in most use cases.
Thanks for the suggestion! I’ll check out those overclocking tips.

That’s a relief to hear! Thanks for the insight!