Hello, recently I bought used Msi B450 Tomahawk with R5 3600, I bought a new R5 5600 and then I wanted to update BIOS so I can plug the 5600. First I tried it with Flashback+ which wasn't successful - I plugged in USB Disk, clicked the button got red light, the Pc turned on by itself and then turned off and the light stood on. I froze, but when I tried to turn the Pc on again it did without problems. In the end I managed to update bios via m-flash and install the new CPU. But new problem occured, everything is very laggy and slow - BIOS, files moving, windows itself, any app, just everything. Temperatures don't go above 40°. I tried reseating RAMs, trying single sticks, different GPU, different PSU, nothing helped. I have no more access to the old CPU, however, what could be the problem? Thank you