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Comparison Samsung 990 PRO MZ-V9P2T0BW 2 TB
without radiator
vs Samsung 980 PRO MZ-V8P2T0BW 2 TB
without radiator

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Samsung 990 PRO MZ-V9P2T0BW 2 TB without radiator
Samsung 980 PRO MZ-V8P2T0BW 2 TB without radiator
Samsung 990 PRO MZ-V9P2T0BW 2 TB
without radiator
Samsung 980 PRO MZ-V8P2T0BW 2 TB
without radiator
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Placementinternalinternal
Size2000 GB2000 GB
Form factorM.2M.2
M.2 interfacePCI-E 4.0 4xPCI-E 4.0 4x
Technical specs
ControllerSamsung PascalSamsung Elpis
Cache memory1000 MB
2000 MB /DDR4/
Memory type
3D TLC NAND /Samsung 176-layer/
3D TLC NAND
NVMe
 /1.3c/
Write speed6900 MB/s5100 MB/s
Read speed7450 MB/s7000 MB/s
MTBF1.5 m h1.5 m h
Write IOPS1550 K1000 K
Read IOPS1400 K1000 K
TBW1200 TB1200 TB
DWPD0.3 times/day0.3 times/day
Manufacturer's warranty5 years5 years
General
TRIM
Data encryption
Size22x80 mm22x80 mm
Weight10 g
Added to E-Catalogdecember 2022march 2021

Controller

Model of the controller installed in the SSD.

The controller is a control circuit, which, in fact, ensures the exchange of information between the memory cells and the computer to which the drive is connected. The capabilities of a particular SSD module (in particular, read and write speed) largely depend on this particular scheme. Knowing the controller model, you can find detailed data on it and evaluate the capabilities of the drive. For simple everyday use, this information is usually not needed, but for professionals and enthusiasts (modders, overclockers) it can come in handy.

Nowadays, high-end controllers are produced mainly under such brands: InnoGrit, Maxio, Phison, Realtek, Silicon Motion, Samsung.

Cache memory

Buffer memory is a small chip on the SSD drive that acts as a data transit between the drive and the motherboard. In fact, it acts as a kind of intermediate link between the computer's RAM and the drive's own permanent memory. The buffer is used to store the most frequently requested data from the module, which reduces the access time to them — the information is sent from the cache, instead of being read from the magnetic media. Usually, the larger the buffer size, the higher the speed of the drive, all other things being equal. Also, drives with a large amount of buffer memory reduce the load on the processor.

Write speed

The highest speed in write mode characterizes the speed with which the module can receive information from a connected computer (or other external device). This speed is limited both by the connection interface (see "Connector"), and by the characteristics of the device of the SSD itself.

Read speed

The highest data exchange rate with a computer (or other external device) that the drive can provide in read mode; in other words — the highest speed of information output from the drive to an external device. This speed is limited both by the connection interface (see "Connector"), and by the characteristics of the device of the SSD itself. Its values can vary from 100 – 500 MB / s in the slowest models to 3 Gb / s and higher in the most advanced ones.

Write IOPS

The IOPS provided by the drive in write mode.

The term IOPS refers to the highest number of I / O operations that an SSD module can perform per second, in this case, when writing data. By this indicator, the speed of the drive is often evaluated; however, this is not always true. Firstly, the IOPS values of different manufacturers can be measured in different ways — by the maximum value, by average, by random write, by sequential write, etc. Secondly, the benefits of high IOPS become noticeable only with some specific operations — in in particular, the simultaneous copying of numerous files. In addition, in fact, the speed of the drive may be limited by the system to which it is connected. In light of all this, it is generally acceptable to compare different SSD modules by IOPS, but the real difference in performance is likely not to be as noticeable as the difference in numbers.

As for specific values, for the write mode with IOPS up to 50K is considered relatively modest, 50 – 100K — medium, more than 100K — high.

Read IOPS

The IOPS provided by the drive in read mode.

The term IOPS refers to the maximum number of I / O operations that an SSD module can perform per second, in this case, when reading data from it. By this indicator, the speed of the drive is often evaluated; however, this is not always true. Firstly, the IOPS values of different manufacturers can be measured in different ways — by the maximum value, by the average, etc. Secondly, the advantages of high IOPS become noticeable only with some specific operations — in particular, when copying numerous files at the same time. In addition, in fact, the speed of the drive may be limited by the system to which it is connected. In light of all this, it is generally acceptable to compare different SSD modules by IOPS, but the real difference in performance is likely not to be as noticeable as the difference in numbers.

For modern SSDs in read mode, an IOPS value of less than 50K is considered a very limited indicator, in most models this parameter lies in the range of 50 – 100K, but there are also higher numbers.
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