The Samsung 860 QVO (1TB, 4TB) SSD Review: First Consumer SATA QLC
by Billy Tallis on November 27, 2018 11:20 AM ESTIdle Power Measurement
SATA SSDs are tested with SATA link power management disabled to measure their active idle power draw, and with it enabled for the deeper idle power consumption score and the idle wake-up latency test. Our testbed, like any ordinary desktop system, cannot trigger the deepest DevSleep idle state.
Idle power management for NVMe SSDs is far more complicated than for SATA SSDs. NVMe SSDs can support several different idle power states, and through the Autonomous Power State Transition (APST) feature the operating system can set a drive's policy for when to drop down to a lower power state. There is typically a tradeoff in that lower-power states take longer to enter and wake up from, so the choice about what power states to use may differ for desktop and notebooks.
We report two idle power measurements. Active idle is representative of a typical desktop, where none of the advanced PCIe link or NVMe power saving features are enabled and the drive is immediately ready to process new commands. The idle power consumption metric is measured with PCIe Active State Power Management L1.2 state enabled and NVMe APST enabled if supported.
It appears that the 1TB Samsung 860 QVO was still busy with background processing several minutes after the test data was written to the drive, so our automated idle power measurement caught it still drawing 2W. The 4TB was much quicker to flush its SLC cache and turned in a respectable active idle power consumption score. Both drives have good idle power consumption when put into the slumber state, though we've measured slightly higher than the official spec of 30mW.
The wake-up latency for the 860 QVO is the same as their other SATA SSDs, hovering around a reasonable 1.2 ms. It's not the best that can be achieved over SATA, but it's nothing to complain about.
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0ldman79 - Saturday, December 15, 2018 - link
I found some answers to that question on the Bench.https://www.anandtech.com/bench/product/2339?vs=22...
Load time, file copy times, etc, I guess more day to day testing would be appreciated. The spinner does a decent job on the BAPCo tests.
I'm wondering if the QLC will really improve my load times vs my 2TB mechanical drive that sustains nearly 200MBps read speeds in practice.
ewitte - Thursday, March 28, 2019 - link
Who in their right mind would purchase a QVO drive when the EVO is similarly priced? These drives perform poorly and have horrible longevity. 160MB/s writes after the cache!!!! I will not even touch the smaller EVO drives because the write speed is so low (500GB is ok but 1TB is so affordable now it is my minimum).Sanmayce - Friday, March 29, 2019 - link
Anand, please consider debunking the myth of data retention being limited to a few months.Really, where this myth originates from, f.e. if one buys QVO for backups what is the safe-time-between-losing-data?
My proposal is to fill the drive with 900GB 7z archive and test the integrity after, say, 6 months.
I myself am planning to buy the 1TB QVO just to find how durable it is under superheavy REAL-WORLD random read/writes - QD1. By the way, you are using 16GB spans in your tests, but the SLC is bigger than that, don't you see a problem?
bobhumplick - Thursday, May 16, 2019 - link
so if the intel 660p and the smasung qvo are the same price which one do you get?praveenvj - Friday, July 26, 2019 - link
Now that price has dropped to $400 for 4TB, does this make sense compared to EVO for daily driver PC?southleft - Monday, August 19, 2019 - link
Here we are about 9 months later - August 2019 - and the price of Intel's 660p 1TB model has dropped by 50% when it's on sale. So, for $85 - $95 you can get an NVMe drive with, say, 750GB of usable capacity and it will blow all of these SATA SSDs out of the water. In other words, if you don't fill the drive over about 75% full you'll have a smokin' fast rig.problemchild - Wednesday, October 23, 2019 - link
As a professional many comments here disregard what these drives are intended for and for obvius reasons you wouldn't want to buy them for a server array or high availability applications. Samsung has entered a product which is now competing with lower priced product \ brands. For the average consumer looking for a Samsung branded drive to be used as a basic storage drive for documents, photos, music and game storage it makes a lot of sense. Admittedly IMHO buying a 2TB SSD for general storage use at the $200 mark is extreme in comparison to $80 for a spinner but for some users but for gamers it may be worth the price to use as game storage drive.Scour - Sunday, June 28, 2020 - link
Question: If the SLC-cache is full, the speed drops, that´s clear. But what happened if the SSD have a power loss directly after the data-writing ends? Is all Data still accessable on the SSD (because data still have to be copied from the SLC-cache to the QLC)?leexgx - Thursday, August 6, 2020 - link
did they ever issue a firmware update with the 4TB QVO, EVO and Pro samsung ssds been problematic sometimes not working