Average Bench: 68.7% (670th of 1058)

Based on 2,087 user benchmarks.  Models: SAMSUNG SSD PM851 2.5 7mm 256GB, SAMSUNG SSD PM851 2.5 7m

Above average average bench

The Samsung PM851 2.5 7mm 256GB averaged 31.3% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 4K-64Thread Read Speed 326MB/s
Avg. 4K Random Read Speed 23.5MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 2.5 7mm 256GB is 43.9%. This is a relatively wide range which indicates that the Samsung PM851 2.5 7mm 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 160MB/s
Avg. Sustained Write Speed 178MB/s
ADVERTISEMENT

Average Bench

(Based on 2,087 samples)
Min Avg Max
327 Read 433 499
46.2 Write 191 262
76.9 Mixed 160 211
40.8 SusWrite 178 256
53.1% 240 MB/s
Min Avg Max
12.1 4K Read 23.5 34.2
28.2 4K Write 58.8 98.3
13.8 4K Mixed 23.3 30.9
96.6% 35.2 MB/s
Min Avg Max
168 DQ Read 326 374
48.7 DQ Write 182 256
40.7 DQ Mixed 72.7 84.4
103% 194 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
173GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 190 170 173 167 170 166 MB/s
Read 491
Write 202
Mixed 183
SusWrite 172
58% 262 MB/s
4K Read 29.5
4K Write 87.6
4K Mixed 30.4
130% 49.2 MB/s
DQ Read 371
DQ Write 205
DQ Mixed 86.1
118% 221 MB/s
85GB free (System drive)
Firmware: EXT07D0Q
SusWrite @10s intervals: 155 145 153 145 136 142 MB/s
Read 500
Write 216
Mixed 170
SusWrite 146
57% 258 MB/s
4K Read 28.7
4K Write 79
4K Mixed 29.4
123% 45.7 MB/s
DQ Read 364
DQ Write 167
DQ Mixed 81.2
109% 204 MB/s
151GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 208 243 248 252 252 253 MB/s
Read 419
Write 255
Mixed 179
SusWrite 242
61% 274 MB/s
4K Read 15.3
4K Write 44.5
4K Mixed 22.5
76% 27.4 MB/s
DQ Read 366
DQ Write 255
DQ Mixed 81
123% 234 MB/s
33GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 114 87 90 86 82 80 MB/s
Read 461
Write 178
Mixed 154
SusWrite 89.8
48% 221 MB/s
4K Read 19.6
4K Write 45.8
4K Mixed 20.9
81% 28.8 MB/s
DQ Read 370
DQ Write 149
DQ Mixed 75
104% 198 MB/s
118GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 204 198 219 236 216 214 MB/s
Read 346
Write 248
Mixed 174
SusWrite 214
55% 246 MB/s
4K Read 14.3
4K Write 46.7
4K Mixed 17.2
68% 26.1 MB/s
DQ Read 223
DQ Write 197
DQ Mixed 74
93% 164 MB/s
35GB free (System drive)
Firmware: EXT08D0Q
SusWrite @10s intervals: 41 37 34 35 36 37 MB/s
Read 361
Write 32.3
Mixed 84.2
SusWrite 36.6
28% 129 MB/s
4K Read 21.6
4K Write 32.5
4K Mixed 21.4
77% 25.2 MB/s
DQ Read 314
DQ Write 38.2
DQ Mixed 56.7
72% 136 MB/s
2,087 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 47,301,276 SSDs tested.

Typical PM851 2.5 7mm 256GB Builds (Compare 13,206 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 8%
Tree trunk
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 7%
Tree trunk

Motherboard: Dell OptiPlex 9020

EDIT WITH CUSTOM PC BUILDER Value: 79% - Very good Total price: $241

Popular PM851 2.5 7mm 256GB compatible motherboards:

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.

UserBenchmark of the month

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]

ADVERTISEMENT

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 $394Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $74SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $77SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback