Western Digital’s flagship SN850 stable state drives are among the quickest available on the market, with sequential learn speeds bumping into 7,000MB/s territory. There’s not a variety of headroom left inside the NVMe x4 specification. Be that as it could, WD is seemingly prepping an improve to its flagship line, as confirmed in a brand new PCI-SIG itemizing.
PCI-SIG, or Peripheral Part Interconnect Particular Curiosity Group, is a consortium that oversees PCI Categorical requirements and specs. The record of members is lengthy and contains Western Digital, in addition to large names like AMD, Intel, Microsoft, Seagate, Samsung, and a complete bunch of others—over 800 members in all.
The group maintains an integrators record of “merchandise which have efficiently accomplished the rigorous testing procedures of the Compliance Workshop.” One of many latest additions to the record is a WD Black SN850X drive.
Sadly, accompanying particulars are fairly gentle. All of the itemizing reveals is that the SN850X is a PCIe 4.0 mannequin with a 4x bus width, which undoubtedly means it’s one other NVMe SSD. There is no point out of the SN850X’s velocity capabilities.
That stated, there’s a little bit of headroom within the NVMe x4 spec for WD to wring a bit extra sequential learn efficiency. The PCIe 4.0 spec permits for round 2GB/s per lane, which implies there’s round 8GB/s of bandwidth out there for NVMe x4.
Moreover, the SN850 has much more headroom on the write aspect of the equation—it is rated to succeed in as much as 5,300MB/s, whereas some SSDs are additionally within the neighborhood of seven,000MB/s for writes.