Can take another shot if required but my 50th Anniversary Edition arrived yesterday...yes it's mines, yes I've posted in the other thread

yes it's a beaut!
The 50th Anniversary also shows up as a Generic VGA (x1) card on 3D Mark
I've stuck an extra nudge on the core to 2130 as the aim, 25 extra on the RAM with the Power Limit set to +50% and the my volts down to 1166Mv, this produced a few stable runs on 3D Mark Time Spy with the best result below:
https://www.3dmark.com/3dm/37557708?
Score: 9344
Graphics Score: 9372
CPU Score: 9189
2700X @ 4.1Ghz
2700XT @ 2050/14400
The thing doesn't get near where the aim is, but is pretty stable in the 2000Mhz area now with the lower voltage.