The WD Black SN770 – Look Ma, No DRAM!
It Does Have BiCS 5 Flash Technology Though
Many companies have released versions of their NVMe drives that lack a DRAM cache to lower the cost to purchase one, at the cost of sustained performance, and now Western Digital has added a PCIe 4.0 model to that list. The WD Black SN770 is a four channel PCIe 4.0 NVMe SSD with 512Gbit BiCS 5 TLC flash and a SanDisk controller. The updated flash is the key to this drives performance, which is even more impressive when you see the $130MSRP for the 1TB model.
You might expect a DRAM-less SSD to suffer during sustained writes but the new flash technology really does help this drive beat out similar drives. The new flash doesn’t help it overtake the likes of the Corsair MP600 Pro XT but than again that drive is in a different league when it comes to both performance and price.
The WD Black SN770 sits in the middle of the performance in many cases, easily surpassing other DRAM-less models. In some synthetic benchmarks it even heads towards the top of the charts. All the results are right here.
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