Hi Benjy
Nice new system… I am not enjoying the wait 
I believe the memory report is correct as it is taken from a operating system interrogation command. Unless you had a weird server type motherboard with a specialist layout I would trust the result. It is displayed in bits, so divide by 1,073,741,824 to get the GB. (this is currently done automatically at upload on the latest version)
The virtual memory peak usage is the highest amount of virtual memory used that boot.
In theory it could be possible to log the virtual memory usage at time stamps when the benchmark is running, and then extrapolate the highest value from those logs, and use that instead, however that would be a project in it’self for me. So I wont 
It’s great to see a nice improvement on calculation times. Congratulations a worthwhile investment.