PC Perspective checked out the Samsung 860 QVO 1TB and 4TB SATA SSD
A quote from the article:
With recent QLC SSD launches like the Intel 660P and Crucial P1, folks may have been wondering when Samsung would jump on the QLC bandwagon. Im happy to report that your wait is now over:Samsung 860 QVO 1TB and 4TB SATA SSD Review
Samsung has opted to name this new product QVO. The Q presumably stems from the use QLC flash, which can store four bits per cell.
While QLC writes are far slower than what we are used to seeing from a modern SSD, SLC caching is the answer to bridging that performance gap. The 860 QVO employs Samsungs Intelligent TurboWrite, which has a minimum 6GB static cache plus a dynamic cache of up to 72GB. This dynamic cache varies based on available QLC area which can be reconfigured to operate in SLC mode. Do note the After TubroWrite speeds of 80 and 160 MB/s - thats the raw QLC speeds that you will see if the cache has been exhausted during an extended write period.