I have an evo 970 PLUS 2TB SSD installed in an external thunderbolt 3 enclosure but I am only getting 1300MB/s write speeds (read speeds are good - 2875MB/s). My smaller 970 EVO 1TB gives me 2800MB/s write speeds in the same enclosure - why is this? I was expecting similar or better write speeds with the 970 EVO plus ? The enclosure is a Samsung X5 which was originally 500GB.
After much research it appears its a evo 970 plus firmware thing. Works at full rate with non-plus evo 970. Not throttling as temps remain low and rates consistent throughout tests. I believe its a cache issue.