The weirdest thing happened after an upgrade

Ok, so I’ve been running a Dual Core AMD X2 CPU + v4.16 The usual load was between 30% to 50%. Sometimes, in unusual circumstances the load went up to 100%. So I’ve decided to upgrade the AMD dual core to an AMD Quad Core.

Immediately after the upgrade (just the cpu was replaced from 2x 1.7 to 4x 3.2) the load went up to 70%. How is this possible?

Followup: I fixed it by updating the BIOS. It seems that the interrupts were not executed properly due to the lack of bios update. It’s working fine now.