I agree you don’t need a high end NVMe and most modern NVMe drives will be sufficient. I was more so trying to point out that drives have gotten a lot faster than sata ssd speeds. I don’t have strong recommendations for a specific drive but from a quick look at budget drives the Team Group MP44L 500GB is about 5000MB/s and about half the price at $44. It is still a 10x speed increase over the 850 evo. Some upgrade to NVMe would be highly worthwhile for gaming.
I was a bit mistaken the cache issue is for sustained writes not on sustained reading as I previously mentioned. The MP44L cache is large enough that you would probably never run into an issue with it unless you are re-imaging an entire disk. For drive performance I rely on Tom’s Hardware. For cache issues I specifically refer to their sustained write tests. The main thing to avoid is drives with a small cache as shown by the severe throttling of the Solidigm P41 Plus on that sustained write chart.
There have been a few videos by hardware reviewers to address the sample size concern. Gamers Nexus tested 3 different CPU models with 20+ CPUs each and found that the biggest variance from lowest to highest performance was under 4% while performance variance in most cases was about 2%
https://www.youtube.com/watch?v=PUeZQ3pky-w
The way CPU manufacturing and binning are done means that cpus in particular will have very minor differences within the same model number.