Western Digital is bringing 3D NAND to their high-end consumer SSD family with the launch today of two new NVMe SSDs featuring SanDisk's 64-layer 3D TLC NAND flash memory. As with the SATA SSDs that first brought 3D NAND to their consumer portfolio, Western Digital is releasing the same drive under both their WD and SanDisk brands. Under the stickers, the hardware is identical.

The names are recycled and familiar: the WD Black and SanDisk Extreme PRO. The first WD Black SSD was Western Digital's first consumer NVMe product. It used a Marvell controller and 15nm planar TLC NAND, and ended up near the bottom of the performance rankings for NVMe SSDs, with no appreciable performance advantage over SATA SSDs for heavier workloads. The SanDisk Extreme PRO name hasn't been used on an internal SSD for quite a while, but it carries a strong legacy: the original SanDisk Extreme PRO was a top-tier SATA SSD with MLC NAND and was competitive with the Samsung 850 PRO. The SATA SanDisk Extreme PRO hit the market right before the 850 PRO and was the first consumer SSD to carry a 10-year warranty, forcing Samsung to follow suit with the 850 PRO.

Re-using product names like this without any clear generational indicator or model year will cause confusion. Western Digital has at least ensured that the new drives are using different capacities from their predecessors: the first-generation WD Black was 256GB and 512GB, the original Extreme PRO was 240GB, 480GB and 960GB, and the new WD Black and SanDisk Extreme PRO are 250GB, 500GB and 1000GB. Still, last year's WD Black will be coexisting in the marketplace for several months with this year's model, and the two are very different products.

The new WD Black and SanDisk Extreme PRO SSDs are based on the same platform as the SN720 business/OEM SSD Western Digital announced earlier this year. In addition to the major advance of switching from 15nm planar TLC NAND to 64-layer BiCS 3D NAND, the new SSDs also feature Western Digital's own new SSD controller instead of using a controller from Marvell. This is a major shift toward vertical integration for Western Digital/SanDisk, and is the best strategy for Western Digital to differentiate their products in a market crowded with dozens of brands sourcing their controllers or the entire drive design from the same small handful of vendors.

Western Digital WD Black and SanDisk Extreme PRO Specifications
Capacity 250 GB 500 GB 1 TB
WD Black Model WDS250G2X0C WDS500G2X0C WDS100T2X0C
SanDisk Extreme PRO Model - SDSSDXPM2-500G SDSSDXPM2-1T00
Form Factor M.2 2280 Single-Sided
Interface NVMe PCIe 3 x4
Controller Western Digital in-house
NAND SanDisk 64-layer 3D TLC
DRAM SK Hynix DDR4-2400
Sequential Read 3000 MB/s 3400 MB/s 3400 MB/s
Sequential Write 1600 MB/s 2500 MB/s 2800 MB/s
4KB Random Read 220k IOPS 410k IOPS 500k IOPS
4KB Random Write 170k IOPS 330k IOPS 400k IOPS
Power Peak (10µs) 9.24 W 9.24 W 9.24 W
PS3 Idle 70 mW 70 mW 100 mW
PS4 Idle 2.5 mW 2.5 mW 2.5 mW
Write Endurance 200 TBW
0.4 DWPD
300 TBW
0.3 DWPD
600 TBW
0.3 DWPD
Warranty 5 years
MSRP $119.99
(48¢/GB)
$229.99
(46¢/GB)
$449.99
(45¢/GB)
Amazon Price $119.99 (48¢/GB) $226.75 (45¢/GB) $449.99 (45¢/GB)

The performance specifications of the new WD Black and SanDisk Extreme PRO promise a high-end drive, with sequential read speeds of 3+ GB/s even on the smallest 250GB model, and high random access specifications on the 500GB and larger models. Write endurance ratings are a reasonable 0.3-0.4 drive writes per day for five years. The MSRPs position the WD Black directly against the Samsung 960 EVO and above most other recent consumer NVMe SSDs—the fast-growing entry-level NVMe segment is what most brands are focusing on at the moment.

The WD Black can at least momentarily hit the power limits of the M.2 form factor, but it doesn't feature any heatspreader. Instead, Western Digital is using an uncommon layout that places the controller in the middle of the stick with NAND flash memory on both sides of the controller. This was deemed adequate to prevent overheating, and has the side effect of making it easier to route the 8 channels from the controller to the NAND.

The new drives will initially be available in capacities from 250GB to 1TB, though the SanDisk-branded versions won't include the smallest 250GB model. These drives should all be shipping by the end of the month. Western Digital has not mentioned any plans for a 2TB models, but since they have already announced a 2TB SN720 they obviously have the option to quickly deploy a 2TB WD Black or SanDisk Extreme PRO model if the demand is sufficient.

AnandTech 2017/2018 Consumer SSD Testbed
CPU Intel Xeon E3 1240 v5
Motherboard ASRock Fatal1ty E3V5 Performance Gaming/OC
Chipset Intel C232
Memory 4x 8GB G.SKILL Ripjaws DDR4-2400 CL15
Graphics AMD Radeon HD 5450, 1920x1200@60Hz
Software Windows 10 x64, version 1709
Linux kernel version 4.14, fio version 3.1
The Western Digital NVMe Architecture - NAND & Controller
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  • Rami Meir - Thursday, April 12, 2018 - link

    I would like to see:
    1. 2TB 2280 and 4TB 22110
    2. IOPS performance @ QD=1
    P.S. SW Drivers available at www.nvmexpress.org
    Warranty period directly calculated based on the Endurance fures
    Reply
  • MajGenRelativity - Thursday, April 12, 2018 - link

    Higher capacities can be made available at 2280 by using a double sided drive. As for IOPS performance, that can be calculated fairly easily, and I *think* Anandtech does that (I haven't read this review recently). I'm not sure what you mean about the drivers, or "Warranty period directly calculated based on the Endurance fures" Reply
  • oRAirwolf - Friday, April 13, 2018 - link

    I would really love it if Anandtech had some common usage scenario load times for things like a large spreadsheet in Excel or how fast some modern games load. I would also be interested to know about things like Windows load time and time to wake up from sleep or hibernation. From what I have seen, all of these super fast nvme ssds don't really have a lot of impact on typical end-user usage scenarios like for office workers or gamers. I love bleeding edge tech and I always want manufacturers to push the limits of price and performance but it seems to me like a lot of people get wrapped around the axles about SSD performance when something like an 850 Evo and a 960 Pro will have almost identical load times in a game. Reply

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