Not Everything Is Phison And Samsung
The Lexar NM790 uses the same controller and flash combo as is found in the Acer Predator GM7, Colorful CN700 and Netac NV7000-T. The MSRPs are attractive, ranging from $45 for the 512 GB up to $190 for the 4 TB model, the 2TB model that TechPowerUp reviewed should run you $110. All drives come with a five year warranty and have decent longevity, the 2TB model is rated for 1500 TBW.
The testing shows the the NM790 has a 280GB SLC cache, not the largest on the market but certainly enough to handle most of what you will be doing. Once you fill it a file copy will drop from 5GB/s down to 2.5GB/s. The drive did temporarily slow down after 1.3TB of continual writes, but it did jump back up to 2.5GB/s relatively quickly. As far as lower cost DRAM-less PCIe 4.00 SSDs go, the Lexar NM790 is a solid choice.