Western Digital Introduces WD_BLACK SN770: A DRAM-less PCIe 4.0 M.2 NVMe SSD
 

The initial wave of PCIe 4.0 NVMe SSDs put emphasis on raw benchmark numbers, with power consumption remaining an afterthought. The targeting of high-end desktop platforms ensured that it was not much of a concern. However, with the rise of notebook and mini-PC platforms supporting PCIe 4.0, power consumption and thermal performance became important aspects. With the gaming segment tending to be the most obvious beneficiary of PCIe 4.0 in the consumer market, speeds could also not be sacrificed much in this pursuit.

https://www.anandtech.com/show/17238...40-m2-nvme-ssd