Strange, I've got the same MP510 960GB drive and it wouldn't give me any good score.
I've read somewhere when the SSD's are near full, its speed decreases. I certainly no longer get the advertised speeds using DiskMark. So I guess your score is based on a a fresh drive.
Yes, these Ryzen 5000 CPU's are great. Feels like AMD's Sandy Bridge moment. The Intel 2000 series were a large step up from i7 920 and the i7 2700k lasted me until last year without feeling too slow.
Seems like almost everyone on AM4 will be eyeing an 5900x or 5800x in a few years' time
I certainly am.