Average Bench: 159% (146th of 1074)

Based on 3,717 user benchmarks.  Model: PM991a NVMe Samsung 512GB

Outstanding average bench

The Pm991a NVMe Samsung 512GB averaged 58.8% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Pm991a NVMe Samsung 512GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 640MB/s
Avg. 4K-64Thread Read Speed 892MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Pm991a NVMe Samsung 512GB is 158%. This is a particularly wide range which indicates that the Pm991a NVMe Samsung 512GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 485MB/s
Avg. 4K Random Write Speed 98.9MB/s
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Average Bench

(Based on 3,717 samples)
Min Avg Max
641 Read 1,144 1,582
124 Write 908 1,728
196 Mixed 826 1,506
101 SusWrite 485 799
188% 841 MB/s
Min Avg Max
20.1 4K Read 37.4 54.8
47.9 4K Write 98.9 163
25.3 4K Mixed 49.8 80.7
173% 62 MB/s
Min Avg Max
440 DQ Read 892 1,397
103 DQ Write 461 1,172
159 DQ Mixed 640 1,168
485% 664 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
277GB free (System drive)
Firmware: 26304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 133 183 195 162 151 169 MB/s
Read 1,104
Write 308
Mixed 334
SusWrite 165
104% 478 MB/s
4K Read 35.1
4K Write 127
4K Mixed 45.9
179% 69.3 MB/s
DQ Read 852
DQ Write 189
DQ Mixed 176
218% 405 MB/s
345GB free (System drive)
Firmware: 26304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 188 154 148 126 141 140 MB/s
Read 1,046
Write 203
Mixed 214
SusWrite 150
87% 403 MB/s
4K Read 32.9
4K Write 109
4K Mixed 45
165% 62.4 MB/s
DQ Read 856
DQ Write 139
DQ Mixed 355
297% 450 MB/s
269GB free (System drive)
Firmware: 26304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 159 181 148 158 155 153 MB/s
Read 1,092
Write 334
Mixed 366
SusWrite 159
106% 488 MB/s
4K Read 32.7
4K Write 87.7
4K Mixed 39.2
146% 53.2 MB/s
DQ Read 702
DQ Write 149
DQ Mixed 332
268% 394 MB/s
57GB free (System drive)
Firmware: 26304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 110 109 102 102 103 102 MB/s
Read 1,212
Write 167
Mixed 199
SusWrite 105
90% 421 MB/s
4K Read 27.8
4K Write 81.9
4K Mixed 33.6
128% 47.8 MB/s
DQ Read 772
DQ Write 121
DQ Mixed 244
230% 379 MB/s
159GB free (System drive)
Firmware: 26304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 134 151 145 159 148 146 MB/s
Read 1,171
Write 177
Mixed 236
SusWrite 147
93% 433 MB/s
4K Read 26.8
4K Write 65.6
4K Mixed 34.1
119% 42.2 MB/s
DQ Read 725
DQ Write 186
DQ Mixed 194
211% 369 MB/s
272GB free (System drive)
Firmware: 26304039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 173 185 181 169 194 59 MB/s
Read 885
Write 253
Mixed 405
SusWrite 160
93% 426 MB/s
4K Read 32.1
4K Write 76.8
4K Mixed 40.5
141% 49.8 MB/s
DQ Read 858
DQ Write 146
DQ Mixed 232
239% 412 MB/s
106GB free (System drive)
Firmware: 26302039 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 112 105 103 100 94 96 MB/s
Read 854
Write 162
Mixed 300
SusWrite 102
77% 354 MB/s
4K Read 21.8
4K Write 54.9
4K Mixed 25
94% 33.9 MB/s
DQ Read 594
DQ Write 147
DQ Mixed 319
248% 353 MB/s
3,717 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,945,109 SSDs tested

Typical NVMe Samsung 512GB Builds (Compare 2,804 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 13%
Tree trunk
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 13%
Tree trunk

System: Dell G15 5511

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Popular NVMe Samsung 512GB systems:

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

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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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The Best.
CPUGPUSSD
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Intel Core i5-13600K $273Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i3-12100F $80Nvidia RTX 4070 $500Samsung 870 Evo 250GB $45
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair 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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