Samsung 980Pro 1TB

A very hot SSD, in both explanation. Even it has the best random performance, but the Trim performance is bad on both throughput and latency.

Samsung 980PRO 1T

Basic Information

In this report, we compare mainstream SSDs from NAND makers: Samsung 980PRO, WD SN850, Micron/Crucial P5Plus.

Model Name Firmware Version
980PRO Samsung SSD 980 PRO 1TB 5B2QGXA7
SN850 WDS100T1X0E-00AFY0 614900WD
P5Plus CT1000P5PSSD8 P7CR403


We still check their IO latency first.

Max Write Latency

10 IOPS (ms) 4K 1QD (ms) 512B 1QD 10p filled (ms) 512B 1QD 50% filled (ms) 4K mix RW 90% filled (ms)
980PRO 8.616 8.461 8.462 14.148 42.767
SN850 0.287 5.812 6.555 6.118 166.909
P5Plus 2.273 6.604 7.559 7.914 10.797

The latency is well controlled.


Sequential Write

10% filled (MB/s) 90% filled (MB/s) 50% trimmed (MB/s)
980PRO 3065.800 1796.586 2938.130
SN850 4833.883 1649.519 3225.354
P5Plus 3675.305 1313.732 2999.762

All drives have good and similar sequential write performance. The performance all degrade when drives are full filled, and recover after trim operations.

Random Write

10% filled (K IOPS) 90% filled (K IOPS) 50% trimmed (K IOPS)
980PRO 386.622 544.405 506.412
SN850 280.283 158.988 279.883
P5Plus 558.473 258.988 356.303

980PRO has a good random write performance.


Except for read and write, Trim is also a common command in nowadays’ OS. We test its performance by trim half LBA space. But 980PRO is not good at trim.

IOPS (K) Max Latency (ms) Average Latency (ms) performance before trim (MB/s) performance after trim (MB/s)
980PRO 1.676 58.529 9.535 2172.154 2938.130
SN850 4.184 13.649 3.804 2029.665 3225.354
P5Plus 2.592 44.545 6.103 1566.011 2999.762


If we use SSD in laptop, the power consumption is also a key consideration. We list TMT1/2 setting below.

TMT1 (℃) TMT2 (℃)
980PRO 81 82
SN850 80 82
P5Plus 76 79

Low Power State

PS4 measured power (mW) PS4 exit duration (us) PS3 measured power (mW) PS3 exit duration (us)
980PRO 2043.0 408.1 2044.1 417.2
SN850 1333.3 164.7 1332.1 164.1
P5Plus 60.8 25701.3 57.0 13695.6

980PRO cannot enter PS3 and PS4 low power mode in our test. The low power data is collected after Format operation and keep idle for 2 minutes. Suppose, there should be no background jos in this condition.

Active Power Consumption



In both sequential write and sequential read test above, the temperature of 980PRO rises very fast, and make the performance downgraded.

SLC cache retirement

980PRO use only 10% capacity as SLC cache. When the drive is aged, it still has SLC cache as the FOB drive. So the performance keeps high in the whole life cycle.