I have a 512 GB AData XPG SX8200 Pro NVMe SSD running in a Windows 10 system with all latest updates on a Gigabyte X570 Aorus Elite motherboard under the heatsink (temperatures never go above 46-48 degrees Celsius even under load, idle is 36-38). Even though CrystalDiskMark shows absolutely fine numbers for an NVME (screenshot below), in games I experienced a spike in loading times when I reinstalled them from my 7200 RPM hard drive (!). Loading a game started taking about 1.25-1.5 times what it took on an HDD. When I tried a sequential transfer of a 19GB folder worth of mp4 video from HDD to SSD, for the first 1-2 seconds the speeds are high in the 1.5-1.7GB/s mark which is up to spec, and then quickly fall below 150 MB/s and sometimes even below 100MB/s which makes the whole transfer take a lot of time. Again, it's not thermal throttling, temperatures are well contained. TRIM command is enabled and I already tried formatting the drive. I suspect it has something to do with SLC caching which can explain sequential speeds, but games are random reads/writes, they're not supposed to be so slow.