WD SN550 NVMe SSD: Good performance, very good price - gallopexace1935
WD
At a Glance
Expert's Rating
Pros
- Exceedingly low-priced at the 1TB capacity
- Good everyday performance
Cons
- Drops to 835MBps during provident copies
Our Verdict
A 1TB drive for $100 is easy to like, and we were all but all smiles with this notable advance terminated the Blue SN500. Only the slightly skimpy add up of SLC cache wrinkled our brows. Note that the 250GB capacity maxes kayoed at 950MBps written material, quite than the 1.75GBps at which we clocked the 1TB version.
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WD's parvenu Blue SN550 is a nice improvement on the older SN500, though IT still isn't going to worry the contention with its performance. However, other vendors positive won't be happy that information technology's 10 cents per GB at the 1TB capacity.
This review is part of our ongoing roundup of the record-breaking SSDs. Extend there for information happening competing drives and how we proved them.
Design and features
The WD Blue SN550 is a x4 PCIe 3.0, M.2 NVMe SSD in the 2280 cast gene. That is, 22 millimeters comprehensive, and 80 mm long. The NAND is 96-layer TLC (Triple Level Cell/3-bit) with an unspecified percentage utilized as SLC (Single Level Cell/1-tur) cache. More on that later.
The 1TB SN550 we tested is $100 along Amazon (10 cents a GB), while the 500GB is $70 on AmazonRemove not-product link, and the 250GB flavor costs $50 on AmazonMurder non-product associate. While I didn't find any better deals on a 1TB push on, I did feel several cheaper 250GB and 500GB drives, so it's the highest capacity where you'll have the best bang for the shoot up.
The SN550 carries a v-yr warranty and is rated for 600 TBW for every 1TB of capacity. That means you keister write 600 terabytes to the 1TB drive before you'll start losing capacity, or things will differently go away skew-whiff. Note that TBW ratings are estimates, and likely conservative ones at that, formulated with legal and early concerns in mind.
Performance
While the 1TB Blue SN550 I tested didn't excel at some one tax, it handily outpaced the older SN500 and was combative with its peers throughout. The man-made CrystalDiskMark and AS SSD benchmarks rated it as average for its class, as did our 48GB/450GB re-create tests.
I've seen TLC-NAND based NVMe SSDs plummet to SATA III speeds during long writes. Patc the SN550 dipped to 835MBps instead rapidly, that's as contralto as it went and still what I'd count decent performance. Improved than SATA, in any even, and considering you'll see 1.75GBps during normal, shorter writes, perfectly livable.
IDG While the Addlink S70 is a standout in this examine, this is a very short burst of information and the SN550 actually bested it in real worldly concern copies.
I did not screen the 500GB SN550. If WD is assignment secondary cache every bit a fixed percentage of total capacity, as it seems, the 500GB drive will drop to around 835MBps even sooner than the 15GB mark at which the 1TB content slowed.
IDG The 1TB SN550 runs stunned of cache after single 15GB or so, but the sustained 850MBps write focal ratio is still quite good for a budget TLC NVMe drive.
The 250GB version of the Blue SN550 is rated for a little to a higher degree half the write rush along (950MBps max), as it has fewer channels for transferring data. It equiprobable has less cache as well, so you will not get nearly the same write performance. Reads, which are not cache-dependent, nor so reliant on multiple channels, will follow every bit as quick as the 500GB and 1TB capacities.
IDG In our concrete-world copies, the SN550 matched the Addlink S70, but was swell cancelled the tread of the Kingston KC2000.
The Kingston KC2000 led real-world-wide performance in our 48GB tests, simply the SN550 is a compelling improvement all over its predecessor—and considering the toll, plenty fast plenty.
Acceptable drive from a top off vender
The WD Blue SN550's terms, and its suitability for the average exploiter, are indisputable. IT's definitely one of the top options in the steal NVMe market and from a trusted brand name. Compare to the Kingston KC2000 and the Addlink S70.
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Jon is a Juilliard-trained player, former x86/6800 programmer, and long-time (late 70s) computer enthusiast live in the San Francisco bay area. jjacobi@pcworld.com
Source: https://www.pcworld.com/article/398516/wd-blue-sn550-nvme-ssd-review.html
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