Question Why is my PC (GTX 10606GB I7-4790) SO slow?

Mar 22, 2019
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Ive recently upgraded from a 760 to 1060 6gb and my frame rate barely increased when it comes to games. It still suffers from fps going from 100-20 constantly and stutters my game. Im not sure what the problem is, I'll list my specs below, I've had most of these components for around 5 years so I'm not sure if they've aged properly.

GPU: MSI GTX 1060 6GB OCV1
CPU: I7-4790
MB: H81M-E33
RAM: DDR3 16GB
PSU: 850W
HD: 1TB

If anyone has any solutions or ideas please go ahead and suggest :)