One of the best PCIe 4.0 SSDs we’ve tested is down to 7 cents per GB – the WD Black SN850X 2TB drops down to $139

The WD Black SN850X 2TB SSD, known for its peak PCIe 4.0 speeds, is now priced at $139 on Walmart, down from $167, making it a great value for PC upgrades. Despite not being the newest model, it boasts impressive sequential read and write speeds of up to 7,300 MB/s and 6,600 MB/s, meeting Sony's requirements for PS5 storage. In testing, the drive's pSLC cache of nearly 600GB and power efficiency stood out, with thermal behavior reaching 78-85°C under heavy loads. Overall, it's considered a consistent and well-balanced Gen 4 SSD option.