My cpu will randomly power spike up to 100% usage for a couple of seconds and go back down to normal power usage. The temp will spike to around 88-91 degrees for a second or two and go back down. I'm not sure what the culprit of the spikes are. I tried underclocking to 4.7ghz, tried different power management modes, and multiple apps to monitor whats causing this. Any advice to what could be causing this? It'll happen randomly and some days it wont happen at all. From playing csgo to watching hulu/youtube it'll power up to 100% usage for 2~ seconds and go back down. I use hwinfo, windows gamebar, and task manager to monitor temps and what apps would be causing the spikes but I found nothing. I'm not sure but I'm beginning to believe its my PSU from a previous build. It's an EVGA G2 750w from a build I built back in early 2015. Any and all info is much appreciated, thank you.