One Design, Two Products: The SanDisk Ultra 3D (1TB) and WD Blue 3D (1TB) SSD Reviews, with BiCS 3D NAND
by Billy Tallis on September 14, 2017 9:00 AM ESTAnandTech Storage Bench - Heavy
Our Heavy storage benchmark is proportionally more write-heavy than The Destroyer, but much shorter overall. The total writes in the Heavy test aren't enough to fill the drive, so performance never drops down to steady state. This test is far more representative of a power user's day to day usage, and is heavily influenced by the drive's peak performance. The Heavy workload test details can be found here. This test is run twice, once on a freshly erased drive and once after filling the drive with sequential writes.
Orange is for the new drives, Blue is for the previous generation models
The new WD and SanDisk SSDs offer improved average data rates on the Heavy test. Their peak performance when the test is run on an empty drive rivals Samsung's 850 EVO, but Samsung still has the clear advantage in performance consistency with the best performance on a full drive.
Average and 99th percentile latencies are both improved, placing the new WD and SanDisk SSDs in the top performance tier for SATA drives. The 99th percentile latency results in particular show improved handling of a full drive.
Average read and write latencies on the Heavy test have both been reduced by more than 10%, putting the new Western Digital SSDs on par with their modern 3D NAND competitors.
The 99th percentile read and write latencies show even larger improvement than the averages, with reductions of more than 20% for the WD and SanDisk 3D NAND drives compared to the preceding planar TLC drives. The 99th percentile write latency is now in the top tier, but the 99th percentile read latency has merely improved to average as the MLC SSDs all beat the TLC SSDs on that metric.
Energy efficiency on the Heavy test has clearly improved with Western Digital's switch to 3D NAND, but the Intel/Micron SSDs still come out ahead, and even the Toshiba OCZ VX500 with planar MLC is more efficient so long as the test is run on an empty drive.
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MrSpadge - Thursday, September 14, 2017 - link
The production cost is pretty much the same, be it SATA or PCIe. So "SATA being tapped" doesn't help price at all, except for the fact that manufacturers can't bill you for extra performance. But that was always the case with the slower SSDs.nathanddrews - Friday, September 15, 2017 - link
I know it's not realistic, hence "it would just be nice if".CheapSushi - Sunday, September 17, 2017 - link
V-NAND QLC will make that happen. I think for bulk storage, QLC SATA drives will be perfect for that duty and will decrease price per GB.Magichands8 - Thursday, September 14, 2017 - link
Unfortunately, it's still about 3 times more expensive than it should be for it to be viable. Still wouldn't buy either as they're both crippled by the SATA interface but hey, at least they got the form factor right by offering them in 2.5".MajGenRelativity - Thursday, September 14, 2017 - link
I'm not aware of any SSDs that are 1/3 the price, and there certainly aren't any that are 1/3 the price and have competitive performance. The SATA interface will not be going away for a while, and most people don't need the performance afforded by PCIeDanNeely - Thursday, September 14, 2017 - link
I assume he's sulking because it's still about 5-6x as expensive as spinning rust. ($50 for the 1TB blue at 5400 RPM on amazon). I haven't seen any more recent projections but as of a a year ago the crossover in price per TB was predicted to occur in the mid 2020's; so we've still got a way to go.MajGenRelativity - Thursday, September 14, 2017 - link
Fair point, but SSDs are still viable without a price drop, mass-market adoption is what requires the price dropMagichands8 - Friday, September 15, 2017 - link
Oh I don't mind paying a premium for the SSD tech but I do mind the ridiculously inflated prices and performance bottlenecks that we've had to put up with for years and years. From the other posts here it's obvious that there are a lot of people comfortable with that though and willing if not eager to pay very high prices for low capacity and low performance drives even while manufacturers have had years to differentiate their products. Even when said people must know of the supply shortages and the impending lower prices only a matter of months away. Like I've said before, drives like these might be real last ditch options for people in a crunch who absolutely need a replacement drive immediately or perhaps some other niche reason. But otherwise it just doesn't make much sense.CheapSushi - Sunday, September 17, 2017 - link
Are you saying this because you want to have ONE drive in your system to function as a performance panacea? I can see why someone would advocate for that particular setup if JUST a gamer with a mini-ITX system. But with ATX systems, there's nothing wrong with multiple drives; fom NVMe Optane, to NVMe PCIe to AHCI SATA, each have a place.Magichands8 - Sunday, September 17, 2017 - link
EVERYONE should advocate for that setup. You're obviously very accustomed to think it natural for someone to have 3 or 4 different kinds of storage to achieve their goal(s). Are you telling me that if I offered you a single drive and interface that satisfied all of those rolls you would reject it? Are you actually advocating that computer users should be FORCED to compromise at every step of the way when they use their system?