Average Bench: 102% (232nd of 1058)

Based on 3,228 user benchmarks.  Model: PM991 NVMe Samsung 256GB

Outstanding average bench

The Pm991 NVMe Samsung 256GB averaged 2.4% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Pm991 NVMe Samsung 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 255MB/s
Avg. Sequential Read Speed 884MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Pm991 NVMe Samsung 256GB is 104%. This is a particularly wide range which indicates that the Pm991 NVMe Samsung 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 166MB/s
Avg. Sequential Write Speed 327MB/s
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Average Bench

(Based on 3,228 samples)
Min Avg Max
500 Read 884 1,295
78.2 Write 327 930
131 Mixed 358 937
68.3 SusWrite 166 366
95.1% 434 MB/s
Min Avg Max
17.1 4K Read 32.5 50.7
45.5 4K Write 88.8 135
19.1 4K Mixed 38.8 69.1
146% 53.4 MB/s
Min Avg Max
221 DQ Read 303 481
78.3 DQ Write 244 810
116 DQ Mixed 255 554
196% 267 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
227GB free
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 854 856 617 178 182 182 MB/s
Read 992
Write 884
Mixed 829
SusWrite 478
178% 796 MB/s
4K Read 38.7
4K Write 162
4K Mixed 64.5
227% 88.3 MB/s
DQ Read 482
DQ Write 925
DQ Mixed 556
464% 654 MB/s
180GB free (System drive)
Firmware: 25309039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 741 443 177 173 170 180 MB/s
Read 1,164
Write 794
Mixed 726
SusWrite 314
167% 749 MB/s
4K Read 40.7
4K Write 102
4K Mixed 56
188% 66.4 MB/s
DQ Read 481
DQ Write 382
DQ Mixed 557
383% 473 MB/s
50GB free (System drive)
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 132 133 119 120 125 123 MB/s
Read 1,020
Write 172
Mixed 278
SusWrite 125
86% 399 MB/s
4K Read 38
4K Write 130
4K Mixed 44.2
183% 70.7 MB/s
DQ Read 249
DQ Write 144
DQ Mixed 174
136% 189 MB/s
53GB free (System drive)
Firmware: 25306039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 124 123 124 117 115 109 MB/s
Read 964
Write 139
Mixed 203
SusWrite 119
77% 356 MB/s
4K Read 35.5
4K Write 99.3
4K Mixed 39.9
158% 58.2 MB/s
DQ Read 248
DQ Write 149
DQ Mixed 138
119% 178 MB/s
40GB free (System drive)
Firmware: 25304039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 114 90 70 73 71 65 MB/s
Read 764
Write 127
Mixed 157
SusWrite 80.4
61% 282 MB/s
4K Read 29.2
4K Write 82.5
4K Mixed 31.6
128% 47.8 MB/s
DQ Read 248
DQ Write 99.2
DQ Mixed 136
111% 161 MB/s
84GB free (System drive)
Firmware: 25304039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 123 126 114 107 100 86 MB/s
Read 605
Write 147
Mixed 188
SusWrite 109
57% 262 MB/s
4K Read 29.1
4K Write 88.9
4K Mixed 35.2
136% 51.1 MB/s
DQ Read 248
DQ Write 115
DQ Mixed 172
130% 178 MB/s
90GB free (System drive)
Firmware: 25304039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 93 90 95 78 93 96 MB/s
Read 544
Write 142
Mixed 143
SusWrite 90.8
50% 230 MB/s
4K Read 28.5
4K Write 80.1
4K Mixed 33.2
128% 47.3 MB/s
DQ Read 247
DQ Write 95.5
DQ Mixed 145
114% 162 MB/s
3,228 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 45,307,867 SSDs tested.

Typical NVMe Samsung 256GB Builds (Compare 5,219 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 10%
Tree trunk
Desktop
Desktop 71%
Battleship
Workstation
Workstation 10%
Tree trunk

System: Dell G3 3590

EDIT WITH CUSTOM PC BUILDER

Popular NVMe Samsung 256GB systems:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
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  • - Compare your components to the current market leaders.
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Solid State Drive Rankings (Price vs Performance) July 2021 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.

 Comments

1058 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i5-11400F $239Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-10700K $304Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $29Corsair Vengeance LPX DDR4 3000 C15 2x8GB $85SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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