Today it's quite hot in the UK, 29c in my office right now in-fact so the temps are probably a little higher than they would be otherwise but below are the screenshots.
Cinebench Score:

You can see it more than doubles my old CPU which was the 3930K in the screenshot. The 2,200 score is my 7900X @ Stock (4.2GHz or so with Turbo 3.0) and the 2,400 score is the 4.5GHz result.
Prime95 after 15 Minutes:

(Click to view full screen)
I did manage to get the CPU to run at 4.7GHz which is what it's binned for. However the voltage required was 1.180v and I felt that was too high. At those voltages it would instantly hit 75c doing a Prime95 run and I don't want to run it that hot. I could get 4.6GHz working at 1.175v but again this is still quite high and temps were about 73c under Prime95 so again too high for me.
With 4.5GHz at 1.125v the temperatures are much better, maximum 61c after 15 minutes. It wasn't going any higher so I took the screenshot at that point. And this is under Prime95 which is quite brutal on the CPU. On "normal" tests/applications like for example Cinebench it was only hitting around 53-54c.
So that's the overclocking finished. I don't intend to overclock the RAM because it's already 3600MHz and there's not really any point. My 1TB 970 Pro SSD is coming tomorrow so I will post some benchmarks of that and compare it with my 840 Pro's which I have in RAID0.