Review: Samsung 860 QVO SSD MZ-76Q4T0BW 4TB [MZ-76Q4T0BW]

Samsung 860 QVO SSD MZ-76Q4T0BW 4TB [MZ-76Q4T0BW] – the first solid-state drive from Samsung, built on NAND QLC chips (four-level cell).

The Samsung 860 QVO is a regular 2.5-inch solid-state drive that still uses the general SATA III interface to communicate with the rest of the system. According to the specs, the SSD comes with a QLC 3D NAND flash memory, which leads to an increase in density and therefore lower price than other types of flash memory such as TLC. Unfortunately, as was the case with other new QLC SSDs, the new flash memory may have lower performance and endurance.

Samsung QVO runs at speeds up to 550/520 MB / s, comes with a limited three-year warranty and endurance up to 1440 TB (TBW) for the 4 TB model.

The consistent performance of the Samsung 860 QVO matches that of the Samsung 860 EVO, but worse than 8000 EVO in specifications of 98,000 / 90,000 random read / write operations. This is understandable given that the Samsung 860 QVO focuses on cost rather than speed. Performance seekers should probably choose the EVO or PRO models.

Like all recent Samsung SSDs, the Samsung 860 QVO is equipped with TurboWrite technology, which helps improve disk write performance. SSD is available in three capacities: 1 TB (MZ-76Q1T0BW), 2 TB (MZ-76Q2T0BW) and 4 TB (MZ-76Q4T0BW).

You can buy Samsung 860 QVO SSD MZ-76Q4T0BW 4TB [MZ-76Q4T0BW] or the price 499,- Don’t forget to use discount coupon on computeruniverse.netFWNNROU (How to use it?).


  • Application: Client PCs
  • Capacity 4,000 GB (1 GB=1 Billion byte by IDEMA). Actual usable capacity may be less (due to formatting, partitioning, operating system, applications or otherwise)
  • 2.5 inch form-factor
  • SATA 6 Gb / s physical interface compatible with SATA 3Gb / s and SATA 1.5 Gb / s interfaces
  • Type of memory chip QLC 3D NAND
  • Memory: Storage Memory Samsung V-NAND 4bit MLC
  • Cache Samsung Memory: 4 GB Low Power DDR4 SDRAM
  • Samsung MJX controller
  • Up to 550 MB/s Sequential Read. Performance may vary based on system hardware & configuration
  • Up to 520 MB/s Sequential Write. Performance may vary based on system hardware & configuration. Measured with Intelligent TurboWrite technology being activated
  • Reliability (MTBF) 1.5 million hours (compare MTBF, MTBF)
  • Shock resistance 1500 G for 0.5 ms (half sine)
  • Operating temperature range 0 – 70 ℃
  • Mounting Kit: No
  • Dimensions (WxHxD) 100 X 69.85 X 6.8 (mm)
  • Weight: Approx. 62.0 g
  • Manufacturer’s Warranty: 3-year Warranty or Limited Warranty (1440 TB on record)

Technology and Feature Support

  • TRIM Supported
  • S.M.A.R.T Support
  • World Wide Name supported
  • Support for Auto Garbage Collection Algorithm
  • Support AES Encryption 256-bit Encryption (Class 0), TCG / Opal, IEEE1667 (Encrypted Drive)
  • Device Sleep Mode Supported
  • Magician SSD Management Software

Speed ​​characteristics

  • Maximum write speed (compressed data) 520 MB / s
  • Maximum read speed (compressed data) 550 MB / s
  • Random Read (4 KB, QD32)Up to 97,000 IOPS Random Read. Performance may vary based on system hardware & configuration. Measured with Intelligent TurboWrite technology being activated.
  • Random Write (4KB, QD32) Up to 89,000 IOPS Random Write. Performance may vary based on system hardware & configuration. Measured with Intelligent TurboWrite technology being activated.
  • Random Read (4 KB, QD1)Up to 7,500 IOPS Random Read. Performance may vary based on system hardware & configuration. Measured with Intelligent TurboWrite technology being activated.
  • Random Write (4 KB, QD1)Up to 42,000 IOPS Random Write. Performance may vary based on system hardware & configuration. Measured with Intelligent TurboWrite technology being activated

Power and Power Consumption

  • Average Power Consumption (system level)Average: 3.1 W *Maximum: 5.4 W (Burst mode). Actual power consumption may vary depending on system hardware & configuration
  • Power consumption (Idle)Max. 30 mW. Actual power consumption may vary depending on system hardware & configuration
  • Allowable Voltage 5V ± 5% 


Compared with hard disk drives, solid state drives (SSDs) are faster, more power efficient, emit less heat, are noise and vibration free, and keep your data more secure. But capacity has come at a high cost ― until now. Available in 1,2 and 4 terabytes, the Samsung SSD 860 QVO is packed with Samsung’s leading-edge performance, at an affordable price. Perfect for PC and laptop users looking for a combination of capacity and performance in a single drive. Meet your first terabyte SSD: Samsung SSD 860 QVO.

What is the difference between NAND QLC technology? The data density is increased by 30%, respectively, in order to reach a volume of 1 TB, it is necessary to produce less chips, which reduces the cost of such disks. The flip side is the reduced TBW (manufacturer-guaranteed amount of data that can be written to an SSD). For a terabyte model TBW is 360, and for the 4-terabyte drive is 1440 TB guarantee for recording, which is exactly four times as much as the volume of the SSD itself. Roughly speaking, in order for the Samsung 860 QVO SSD MZ-76Q4T0BW 4TB [MZ-76Q4T0BW] to lose the warranty, you need to record it completely 1440 times. This is an excellent indicator of TBW, which is unlikely to be able to exhaust a normal user in 3 or even five years. However, if you compare with the drive with other Samsung products, for example, 860 Evo per 1 TB of the same form factor, then its TBW parameter will be almost twice as good. But the price per Terrabyte of such a drive is 30% higher.

Disk speed: 520 Mb / s for reading and 550 Mb / s for writing, which is an excellent indicator for such a large disk with a good price, and with a price per terabyte it is much lower than its analogues.

Cost of SSDs 2012-2022, trends and forecast

The difference between QLC and other memory chips

Inside the SSD there are figurative memory chips, in figurative memory chips there are figurative memory cells, imagine them in the form of a circle. A circle can have two different voltage charges. One charge speaks about zero bit, another – about one bit. This is the principle of operation of an SLC memory cell (S – Single) when only one bit of information is transmitted.

MLC – these are two bits of storage in one cell, respectively, there are four levels of charge.

TLC is a less reliable option, but still a very popular version of chips. The last generation is called 3D-Nand, and the disks on this memory proved to be quite reliable in general, while being fast and cheap. In TLC 3D Nand, there are eight charge levels at once, and at the same time, 3 bits are stored in one memory cell.

QLC – from the word “Quad” it has four bits in one cell, which is 30% more than TLC chips. SSDs with such parameters are more affordable, cheaper, but the question of reliability arises. So far, only Samsung has released drives with such memory chips, and only time will tell how durable they will be.

Key Features of QLC SSD format

  • Solid-state drive (SSD) with a large capacity for everyday applications on a PC or laptop, is well suited as an alternative to a hard drive (hard drive)
  • More power – 3.6 times faster than a hard drive (read speed 550 MB / s, write speed 520 MB / s)
  • Faster startup and shutdown, faster boot times and faster data transfers can give you a PC feel.
  • Thanks to the impact resistance of your SSD, your data is more secure than HDD
  • Easily transfer data from your old hard drive to SSD with free Samsung Data Migration software

Quality and Value Optimised SSD

More accessible terabyte capacity. The 860 QVO SSD gives you huge storage, with solid performance and reliability at exceptional value. This breakthrough was achieved with Samsung’s latest 4-bit MLC NAND flash technology. Now’s the time to upgrade or expand to the fast SSD you need.

Speed Up to a New Normal

Speed it all up. Up to 550 MB/s read and 520 MB/s write speeds give the experience of a new computer with fast boot-ups, shutdowns, transfers, and application responsiveness. Intelligent TurboWrite accelerates write speeds and maintains long-term high performance with a larger variable buffer.

Trusted Reliability

Always be sure. The 860 QVO is your reliable alternative to legacy storage, built with Samsung V-NAND technology, and backed by a limited warranty of 3 years or up to 1,440 TBW. Samsung’s extensive analysis of SSD user patterns has resulted in a sufficient TBW rating to assure everyday PC users.

Smart Compatibility

Benefit from faster, more fluid communication with your host system. The refined ECC algorithm and a new MJX controller generate higher speeds, and the improved queued trim enhances Linux compatibility.

Terabyte-level capacity

Ample capacity at fast speed is worth the switch. Terabyte-level capacity on a fast SSD elevates your computing experience. Upgrade from multiple storage solutions to the simple speed of one single mass-storage SSD to keep both your OS, applications and massive data all together.

Samsung Magician

Advanced drive management made simple. The Samsung Magician software will help you keep an eye on your drive. A suite of user-friendly tools helps keep your drive up to date, monitor drive health and speed, and even boost performance.


Performance in CrystalDiskMark 1 and 2 terabyte models of SSD.

Performance in PCMark 8 Storage Benchmark 2.0, comparison with Samsung 860 Evo 1 Tb, Crucial MX500 1TB, WD Blue 3D Nand 1TB, ADATA Ultimate SU800 1TB, Kingston UV500 960GB, ADATA Ultimate SU650 960GB.

Testing Samsung 860 QVO drives with 1TB and 2TB capacity in PCMark 8 2.0 MB / s. Real tests in games and applications World of Warcraft, Battlefield 3; Microsoft Word, Power Point, Excel; Adobe Photoshop Light, InDesign, Illustrator, After Effects.

Customer reviews

Buyers in their reviews praised the beautiful appearance of the drive, its quiet operation, low temperatures under load, low cost per gigabyte of memory (30% cheaper than symmetric counterparts based on TLC 3D V-NAND); Although the rewrite resource (TBW) is less than that of more expensive counterparts, customers considered that a resource of 320 TB (for 1 TB) would be enough for more than 130 years. The actual resource will greatly depend on the controller and on the survivability of the memory.

The disadvantages that the buyers noted is the speed characteristics of the drive, which are worse than the 860 EVO. Speed ​​drops several times when working with large amounts of data and when filling out the disk with more than 70% of data.

The speed parameters of the Samsung 860 QVO are worse than the 860 EVO. Working with the QLC 3D V-NAND array in the 860 QVO generates higher latencies, which ultimately translate into lower performance. The direct write speed to the TLC 3D V-NAND array of the Samsung 860 EVO 1 TB is about 420 MB / s, and the Samsung 860 QVO 1 TB writes data to its QLC 3D V-NAND array almost six times slower – with a speed of only about 75 MB / s Paying for a 33 percent increase in the density of information storage in QLC cells and for a twofold increase in the volume of crystals turns out to be cruel.

Negative feedback  of the user from the Yandex.Market platform.



What kind of durability are we talking about? This is a one-time hack on QLC chips for absolutely undemanding housewives. And no one knows how long this product will last. Samsung once again screwed up, as with a folding smartphone 🙂

Negative review of Samsung 860 QVO SSD MZ-76Q4T0BW 4TB [MZ-76Q4T0BW] on Yandex.Market


A troublesome installation. Hope to see good performance going forward.
January 19, 2019 [Verified Purchase]
Capacity: 1TB Pattern: Single
Since this SSD includes absolutely no installation instructions, outside of the most unhelpful diagram ever, if you just want an extra drive to run certain stuff more quickly one, rather than migrating data. Thankfully, I am a software engineer… which meant I had no idea what to do. So I contacted support. It’s 3 am, I didn’t expect much. Restarted a couple times. Tried rewiring the sata cables (which it didn’t come with, by the way…kinda inconvenient). Nothing.

So, finally, about to give up I right clicked on “This PC” in File Explorer, hoping to find something of note. I found Manage. Navigated to Disk Management, and waited for a moment. Finally, it was shown that the new SSD was not formatted. Like literally at all. So I just did that, and now it shows up in file explorer. yay.

After a few tests, it says that it’s downloading and moving files at around 1 MB/s, where the other components are now bottlenecking it. So…all in all…looks good for a hard drive.

EDIT: However, running programs on this SSD seems to be severely harming my CPU performance. I can’t seem to fathom why. Sometimes it even tops out my CPU to 100% playing League of Legends, which is just the oddest thing, as it never went beyond 20% before migrating it over to SSD. Perhaps the drive has a high miss rate, and is forcing the CPU to continuously query the drive?

Review from Amazon’s customer

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