Error: APU not detected.
Error: APU not detected.
You're experiencing issues with your older HP Pavillon due to compatibility and upgrade problems. The system runs outdated hardware, and the new components you're adding might not align with the motherboard or BIOS version. It seems the Radeon Vega Graphics are missing from Task Manager, which could point to a motherboard or driver conflict. Upgrading RAM to 3200MHz CL16 is fine, but the overall setup might not support the newer parts. Consider checking the motherboard documentation or contacting HP support for compatibility details.
Checked the linked list for 3400G and found no mention of an A520 board with a 3000G CPU from AMD.
It seems you're facing a situation without a clear solution. It's possible some basic assistance was overlooked during the process.