The Samsung 860 QVO (1TB, 4TB) SSD Review: First Consumer SATA QLC
by Billy Tallis on November 27, 2018 11:20 AM ESTAnandTech Storage Bench - Light
Our Light storage test has relatively more sequential accesses and lower queue depths than The Destroyer or the Heavy test, and it's by far the shortest test overall. It's based largely on applications that aren't highly dependent on storage performance, so this is a test more of application launch times and file load times. This test can be seen as the sum of all the little delays in daily usage, but with the idle times trimmed to 25ms it takes less than half an hour to run. Details of the Light test can be found here. As with the ATSB Heavy test, this test is run with the drive both freshly erased and empty, and after filling the drive with sequential writes.
The Samsung 860 QVO has no trouble with the Light test when it is run on an empty drive, and the full-drive performance loss is not too bad: the 1TB 860 QVO remains ahead of the DRAMless TLC drive even when the drives are full.
The average and 99th percentile latency scores from the 860 QVO are no problem when the test is run on a full drive. They're substantially higher when the drives are full, but the latency is better-controlled than on the Intel/Micron QLC drives.
The average read and write latency scores from the 860 QVO are clearly different from the TLC drives for the full-drive test runs, but they don't stand out as significantly worse than what we've seen from some of the slower TLC drives.
The 99th percentile read latency on the 860 QVO is a sore spot when the drive is full, but the 99th percentile write latency doesn't get too far out of control, especially compared to the other two QLC drives.
All of the QLC drives use more energy than the TLC drives during the Light test, and especially when the drives are full and have more background work to do.
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Santoval - Wednesday, November 28, 2018 - link
"Right now there is exactly zero reason to choose it over the EVO. The 500GB EVO costs about $130 US where I'm from, there's very little incentive for me to buy it given the "inflated" price."Assuming the 500GB EVO actually costs as much as the 1TB EVO in your country (I'm frankly skeptical about this, but let's take you at your word) what makes you thing that the 1TB QVO will not in turn cost as much as the 2TB QVO?
Are you seriously suggesting that your country's taxmen or tariffmen are going to place much lower taxes/tariffs on QLC based SSDs than one TLC based SSDs?
Lolimaster - Thursday, November 29, 2018 - link
Import the 1TB from Amazon, you can do that to any south american country.Impulses - Thursday, November 29, 2018 - link
Even at 25% cheaper than an EVO it would barely beat the (current) best sale price of other mainstream TLC SSD... And TLC is probably not going away any time soon. I'd love to see the price gap reach 25%+ sooner rather than later tho.Oxford Guy - Tuesday, November 27, 2018 - link
It may be that companies are hoping for higher margin. It is not impossible for that to happen. CDs, for example, were a higher margin product than the LPs they replaced.If supply of TLC shrinks, as companies move to QLC production, the competition between TLC and QLC also shrinks, making room, potentially, for more margin.
Amandtec - Tuesday, November 27, 2018 - link
The yields are poor at the moment so there is no point selling them low. It has a big effect on your share price if you release new game changing technology like QLC to market, because shareholders are sophisticated and understand the long term term strategy here.moozooh - Wednesday, November 28, 2018 - link
> The yields are poor at the moment so there is no point selling them low.I think you misunderstand: there's no point *buying them high*. The only point of these drives is buying them low. So not selling them low means *not selling them*, period.
Customers may not be shareholders, but they aren't idiots, either. They understand QLC is a step down in almost every aspect of the drive's operation. It's an inferior product, and the price needs to reflect that for it to be considered for purchase.
jjj - Wednesday, November 28, 2018 - link
Actually , R&D is surprisingly low compared to the revenue generated and, aside from that, they might be close enough to 5 cents per GB production costs now for QLC so if there is a global economic crash caused by Trump and his tariffs, we could see 50$ per TB in half a year from now.Otherwise, could be 2020-2021 for that kind of price, especially if China manages to ramp output.
NAND prices are down a bit from peak but folks still have 40-50% overall NAND margins,there is room for much lower prices and production costs decline 15-25% per year.
R0H1T - Wednesday, November 28, 2018 - link
>they might be close enough to 5 cents per GB production costs now for QLCSure but that's at least 6~12 months away from now. So how can anyone realistically expect Samsung to debut the QVO at such prices given there's no competition (SATA QLC) nor any reason for Samsung to not make hay while the sun shines? For anyone who says the $130 US for 1TB EVO is the normal price, it's not in the ROTW.
sonny73n - Wednesday, November 28, 2018 - link
“Yeah no one's selling you 8TB for $400 anytime soon. Aside from the fact that the R&D costs for QLC need to be recuperated first & companies need to reinvest an increasing amount for future development, there's also a point after which it doesn't make sense for the SSD, or NAND, maker to sell these at a loss.If you really want something that big, for dirt cheap, try spinners instead.”
You sound like a Samsung shill. If HDD manufacturers decide to keep on R&D for those spinners, are you willing to pay extra for their future development? Beside, SSD tech has been around for a decade, now it costs less to make an SSD than to make an HDD for the same capacity.
R0H1T - Wednesday, November 28, 2018 - link
>You sound like a Samsung shill.Oh sure let's all forget the aftermath of the Thai floods ~ insane prices, insane quality (as in really bad) w/warranties as low as just a year long! So while the HDD makers sat on their collective behind, much like Intel, the SSD makers out paced them, out innovated(?) them & could make spinners virtually obsolete, except bottom of the barrel 5400/5900 rpm drives especially in $/GB.
So let's see, arguing for higher prices because R&D is an ever increasing (one time) cost that needs to be recuperated, is shilling now? Do you also want me to feel sad because vacuum tubes are dead or that NAND prices will continue to fall, in the foreseeable future?