Average Bench: 98.4% (264th of 1074)

Based on 4,948 user benchmarks.  Model: PM991 NVMe Samsung 256GB

Excellent average bench

The Pm991 NVMe Samsung 256GB averaged just 1.6% lower 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 226MB/s
Avg. Sequential Read Speed 844MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Pm991 NVMe Samsung 256GB is 101%. 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 152MB/s
Avg. Sequential Write Speed 273MB/s
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Average Bench

(Based on 4,948 samples)
Min Avg Max
527 Read 844 1,186
68.6 Write 273 899
125 Mixed 313 883
62.5 SusWrite 152 370
86.4% 395 MB/s
Min Avg Max
17.5 4K Read 33.1 50.4
40.2 4K Write 87.1 135
18.3 4K Mixed 37.6 68.9
145% 52.6 MB/s
Min Avg Max
182 DQ Read 285 481
71 DQ Write 216 791
98.1 DQ Mixed 226 553
176% 242 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
176GB free (System drive)
Firmware: 25306039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 732 416 164 164 174 180 MB/s
Read 711
Write 617
Mixed 615
SusWrite 305
126% 562 MB/s
4K Read 35.1
4K Write 58
4K Mixed 44.5
141% 45.9 MB/s
DQ Read 476
DQ Write 609
DQ Mixed 535
406% 540 MB/s
183GB free (System drive)
Firmware: 25311039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 507 576 194 152 150 143 MB/s
Read 865
Write 645
Mixed 608
SusWrite 287
134% 601 MB/s
4K Read 34.4
4K Write 58.6
4K Mixed 42.1
137% 45 MB/s
DQ Read 458
DQ Write 280
DQ Mixed 454
316% 397 MB/s
79GB free (System drive)
Firmware: 25307039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 129 128 123 123 120 126 MB/s
Read 819
Write 158
Mixed 168
SusWrite 125
69% 318 MB/s
4K Read 33
4K Write 102
4K Mixed 39.9
155% 58.2 MB/s
DQ Read 230
DQ Write 117
DQ Mixed 167
126% 171 MB/s
53GB free (System drive)
Firmware: 25307039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 83 82 79 78 84 79 MB/s
Read 852
Write 81.9
Mixed 133
SusWrite 80.9
61% 287 MB/s
4K Read 27.3
4K Write 65.4
4K Mixed 29.2
113% 40.6 MB/s
DQ Read 232
DQ Write 79.1
DQ Mixed 122
99% 145 MB/s
125GB free (System drive)
Firmware: 25311039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 119 114 112 115 111 118 MB/s
Read 648
Write 135
Mixed 213
SusWrite 115
60% 278 MB/s
4K Read 13.8
4K Write 30.9
4K Mixed 18.7
61% 21.1 MB/s
DQ Read 245
DQ Write 124
DQ Mixed 152
122% 174 MB/s
6GB free (System drive)
Firmware: 25304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 68 66 61 59 56 55 MB/s
Read 707
Write 76.5
Mixed 122
SusWrite 60.8
52% 241 MB/s
4K Read 17.8
4K Write 29.8
4K Mixed 19.7
68% 22.4 MB/s
DQ Read 207
DQ Write 71.5
DQ Mixed 114
91% 131 MB/s
154GB free (System drive)
Firmware: 25306039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 124 130 120 120 128 123 MB/s
Read 432
Write 141
Mixed 209
SusWrite 124
50% 227 MB/s
4K Read 16.8
4K Write 34.9
4K Mixed 19.8
69% 23.8 MB/s
DQ Read 211
DQ Write 140
DQ Mixed 166
126% 172 MB/s
150GB free (System drive)
Firmware: 25304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 106 94 96 90 92 90 MB/s
Read 431
Write 130
Mixed 152
SusWrite 94.8
44% 202 MB/s
4K Read 10
4K Write 32.7
4K Mixed 13.5
50% 18.7 MB/s
DQ Read 183
DQ Write 99.1
DQ Mixed 76.6
74% 120 MB/s
4,948 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,995,491 SSDs tested

Typical NVMe Samsung 256GB Builds (Compare 2,918 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 10%
Tree trunk
Desktop
Desktop 64%
Destroyer
Workstation
Workstation 9%
Tree trunk

System: Dell G3 3590

EDIT WITH CUSTOM PC BUILDER

Popular NVMe Samsung 256GB systems:

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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

1074 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

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Intel Core i5-12400F $124Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-13600K $260Nvidia RTX 4070 $550Samsung 870 Evo 250GB $45
HDDRAMUSB
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3000 C15 2x8GB $48SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $62G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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