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 |
Latency
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.
Speed
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 |
Trim
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 |
Power
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.
