PC running meh

I’ve been into pcs for almost 10 years now and have upgraded and replaced parts over time. For some reason I feel like my pc isn’t running as good as it could be given my specs. I barely get over 100 fps in most games. Temps are relatively fine. Long and intense gaming sessions can reach around mid 70s on both cpu and gpu but usually are around mid 60s. I ran cinebench and hardware ranks significantly lower than it should.

Specs: GPU: Asus ROG strix 3080 CPU: AMD Ryzen 7 5700x3d AIO: Corsair iCUE h100i elite CAPELLIX XT MOBO: Asus ROG strix b450-f Ram: Corsair Vengence DDR4 3600MHz PSU: EVGA 850 Gold