Crucial P5Plus 1TB

This drive works great on performance and conformance tests. It is balanced on functions, performance, latency, power and reliability. 👍

Crucial P5Plus 1T

Basic Information

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

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


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)
P5Plus 2.273 6.604 7.559 7.914 10.797
SN850 0.287 5.812 6.555 6.118 166.909
980Pro 8.616 8.461 8.462 14.148 42.767

The latency is well controlled.


Sequential Write

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

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)
P5Plus 558.473 258.988 356.303
SN850 280.283 158.988 279.883
980Pro 386.622 544.405 506.412


Except for read and write, Trim is also a common command in nowadays’ OS. We test its performance by trim half LBA space.

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


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

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

P5Plus has the lowest TMT1, which may be easiler to enter thermal throttling.

Low Power State

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

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 sequential write, the temperature and performance keep stable. But in sequential read test, the temperature drops a lot sometimes. Maybe it is due to the temperature, though its SMART temperature is lower than TMT1 at that time.

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.