You can't set a higher speed on the CPU if you already changed the speed of your memory or turned on XMP mode.
You can't set a higher speed on the CPU if you already changed the speed of your memory or turned on XMP mode.
I just changed my motherboard to a B450 Tomahawk Max and decided to swap my RAM too. I wanted something that can run at 3200 or faster with RGB lighting, so I bought some used Hyper X Predator RAM that supports 3200MHz. When I used this new memory with my old stick, it worked fine. It let me overclock from 2666 to 4GHz on my Ryzen 5 2600 without any problems. But now something is wrong; I can't enable the XMP settings for either speed (3200 or 2933) and I can't even push the CPU frequency higher than before, even though it worked perfectly with just one stick of RAM. I tried changing the timing values manually, updating my BIOS, and swapping out both sticks of RAM at the same time. It really is driving me crazy because nothing seems to be working. The computer boots up no matter what settings I choose in the BIOS, but if I turn it off or go to sleep, it stops responding completely. There is no debug light showing up, no sounds coming from speakers, and no display output at all. The only way to get back into the system is to reset the CMOS settings. Anyone having this same problem?