Ironically, I'm using a DeepCool AK620 with my 5800X3D cpu - the Assassin was out of stock at the time...
I think you can save some more money on a few other items - I'm using 16gb of ram & I've yet to run in to any issues with that amount.
I also think you can save some money on the power supply. Is there a particular reason for choosing the Cooler Master 850w psu? For instance, here is some power usage data using a 5800X3D & 4070ti (both tend to use more power than the 7800X3D/7800 XT in games) - CapFrameX.
Power Usage | Ave | Max |
MS Flight Sim cpu | 58 | 95 |
MSFS gpu | 194 | 245 |
MSFS total | 252 | 340 |
ACC cpu | 47 | 56 |
ACC gpu | 220 | 230 |
ACC Total | 267 | 286 |
rf2 cpu | 58 | 70 |
rf2 gpu | 217 | 225 |
rf2 Total | 275 | 295 |
AC cpu | 46 | 57 |
AC gpu | 221 | 229 |
AC total | 267 | 286 |
Remnant2 cpu | 59 | 71 |
Remnant2 gpu | 246 | 265 |
Remnant2 total | 305 | 336 |
It's also unlikely both
cpu & gpu are going to be maxed out @ the same time.