Average Bench: 114% (189th of 1058)

Based on 246 user benchmarks.  Model: NVMe PM991 NVMe Samsung 256GB

Outstanding average bench

The Nvme PM991 Samsung 256GB averaged 14.0% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme PM991 Samsung 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 346MB/s
Avg. Sequential Read Speed 992MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Nvme PM991 Samsung 256GB is 94.2%. This is a particularly wide range which indicates that the Nvme PM991 Samsung 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 210MB/s
Avg. Sequential Write Speed 521MB/s
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Average Bench

(Based on 246 samples)
Min Avg Max
678 Read 992 1,339
97.1 Write 521 924
145 Mixed 534 936
90.3 SusWrite 210 337
125% 564 MB/s
Min Avg Max
19.3 4K Read 35.1 50.7
49.2 4K Write 89.5 139
22 4K Mixed 41.6 69
154% 55.4 MB/s
Min Avg Max
217 DQ Read 360 482
93.6 DQ Write 277 779
128 DQ Mixed 346 557
251% 328 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
198GB free (System drive)
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 757 611 177 177 176 175 MB/s
Read 1,342
Write 899
Mixed 921
SusWrite 345
195% 877 MB/s
4K Read 51.8
4K Write 152
4K Mixed 70.9
250% 91.6 MB/s
DQ Read 481
DQ Write 794
DQ Mixed 553
443% 609 MB/s
106GB free (System drive)
Firmware: 25309039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 156 125 130 131 110 89 MB/s
Read 958
Write 159
Mixed 206
SusWrite 124
78% 361 MB/s
4K Read 33.7
4K Write 104
4K Mixed 38.2
155% 58.7 MB/s
DQ Read 250
DQ Write 131
DQ Mixed 195
144% 192 MB/s
103GB free (System drive)
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 130 129 123 132 127 114 MB/s
Read 883
Write 128
Mixed 235
SusWrite 126
74% 343 MB/s
4K Read 35.3
4K Write 112
4K Mixed 37.7
161% 61.7 MB/s
DQ Read 249
DQ Write 130
DQ Mixed 181
137% 186 MB/s
83GB free (System drive)
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 127 107 99 98 100 98 MB/s
Read 799
Write 140
Mixed 193
SusWrite 105
67% 309 MB/s
4K Read 33.7
4K Write 109
4K Mixed 38.3
158% 60.3 MB/s
DQ Read 248
DQ Write 124
DQ Mixed 152
122% 175 MB/s
97GB free (System drive)
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 106 101 102 105 101 98 MB/s
Read 835
Write 124
Mixed 155
SusWrite 102
65% 304 MB/s
4K Read 33
4K Write 98.2
4K Mixed 36.2
148% 55.8 MB/s
DQ Read 248
DQ Write 107
DQ Mixed 132
110% 162 MB/s
67GB free (System drive)
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 104 92 91 98 98 98 MB/s
Read 798
Write 116
Mixed 186
SusWrite 96.6
64% 299 MB/s
4K Read 27.4
4K Write 58.4
4K Mixed 23.3
102% 36.4 MB/s
DQ Read 235
DQ Write 105
DQ Mixed 132
108% 157 MB/s
89GB free (System drive)
Firmware: 25307039 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 104 92 97 93 98 91 MB/s
Read 703
Write 108
Mixed 164
SusWrite 95.8
58% 268 MB/s
4K Read 19.4
4K Write 49.4
4K Mixed 27.3
90% 32 MB/s
DQ Read 246
DQ Write 105
DQ Mixed 111
99% 154 MB/s
246 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 46,974,678 SSDs tested.

Typical PM991 Samsung 256GB Builds (Compare 1,496 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 18%
Surfboard
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 16%
Surfboard

System: Dell Inspiron 5502

EDIT WITH CUSTOM PC BUILDER

Popular PM991 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.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
Solid State Drive Rankings (Price vs Performance) September 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 i5-11600K $270Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $350Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $78SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $78SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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