WD Black SN770 review: just short of SSD greatness

Western Digital are continuing their charge into high-speed PCIe 4.0 SSDs with the WD Black SN770. This is pretty straight down the middle as far as Gen 4 SSDs go: the 1TB model I’ve tested claims sequential speeds up to 5150MB/s for reads and 4900MB/s for writes, enough to embarrass any PCIe 3.0 SSD without veering into mega-enthusiast territory. There’s a broad range of capacities too, starting at 250GB and ending at a roomy 2TB.

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