Incomprehensible FPS drops after a processor update, what could be the problem?

Question

Processors

I updated the processor from 2.8GHz 2-core (celeron g1630) to 3.3GHz 4-core (i5-2500), I thought that in games the performance would rise a little, but the FPS began to sit even more (video card gt 740 1gig), the multiplier was unscrewed through bios up to 37, if you look through GPU-Z, then the video card does not rise by more than 50% (GPU load item) and the processor is also about 50-60% loaded if you look through CPU-Z, then often that processor jumps from x8-x29, in what could be the problem???

Answer 1

Update the BIOS if this does not help, then the power subsystem of the motherboard does not hold a percentage of the current