The launch of PCIe50 devices doesn't mean PCIe40 SSDs are old hat now, as Samsung is launching its new 990 Pro SSD with PCIe 4.0 and better performance.
Much of the discourse on SSDs has recently been focused on the upcoming PCIe 5.0 spec, which has twice the bandwidth of PCIe 4.0 and will theoretically allow SSDs to hit even greater speeds, just as PCIe 4.0 did in 2019. But that doesn’t mean PCIe 4.0 SSDs are old hat now, as Samsung is launching its new 990 Pro SSD with older PCIe 4.0 technology. And it’s ready for Microsoft’s DirectStorage and PS5.
The sequential performance gains are not quite as dramatic as we’ve seen with PCIe 5.0 SSDs, which can reach over 13,000MB/s reads. However, the 990 Pro does have slightly higher reads and significantly higher writes than the last-gen 980 Pro. The claimed performance uplift in random reads and writes is much more substantial as the 990 Pro apparently has 55% more IOPS.
Samsung attributes the performance and efficiency improvements of the 990 Pro primarily to the 8nm controller that the new SSD uses — the company claims it’s the first SSD controller on 8nm. However, the 980 Pro also used an 8nm controller; we’re not sure if Samsung means the 990 Pro uses the same controller as the 980 Pro or if the company made a mistake in its product announcement. We’ve reached out to Samsung for clarification on this point.
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