Wanting to refresh my rig, been a decade since I've looked into what's good and what's crap. Any assistance figuring out what bits of my system are still good and where I could easily improve would be much appreciated!!

Parts are as follows:

Core i7 9700k @ 3.60 (8 CPUs)

2x 16GB DDR4 PC4-21300, 2666MHz

GeForce RTX 3090

EVGA 850 g5 psu

Samsung SSD - 1tb (and an M2 one too!)

It's based out of an old 90JF0082US, but I've swapped out just about everything except the mobo, CPU, case and AIO cooling over the years. The though of swapping the latter out frankly terrifies me xD

Any suggestions would be immensely appreciated!