Average Bench: 65% (744th of 1074)

Based on 6,648 user benchmarks.  Models: SAMSUNG SSD PM851 mSATA 256GB, SAMSUNG SSD PM851 mSATA

Above average average bench

The Samsung PM851 mSATA 256GB averaged 35.0% 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 323MB/s
Avg. 4K-64Thread Mixed IO Speed 72.4MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Samsung PM851 mSATA 256GB is 39.6%. This is a relatively wide range which indicates that the Samsung PM851 mSATA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 154MB/s
Avg. Sustained Write Speed 167MB/s
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Average Bench

(Based on 6,648 samples)
Min Avg Max
316 Read 412 483
44.6 Write 187 259
81.3 Mixed 154 193
41.5 SusWrite 167 252
50.8% 230 MB/s
Min Avg Max
10.9 4K Read 22.7 32.9
23.5 4K Write 52 79.7
13.2 4K Mixed 22.1 29.1
90.2% 32.3 MB/s
Min Avg Max
152 DQ Read 323 372
50.1 DQ Write 172 256
48.2 DQ Mixed 72.4 82.9
101% 189 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
45GB free
Firmware: EXT4AD0Q
SusWrite @10s intervals: 254 255 254 254 254 253 MB/s
Read 450
Write 254
Mixed 190
SusWrite 254
64% 287 MB/s
4K Read 24.6
4K Write 57.2
4K Mixed 25.5
100% 35.8 MB/s
DQ Read 366
DQ Write 253
DQ Mixed 73.3
119% 231 MB/s
56GB free
Firmware: EXT4AD0Q
SusWrite @10s intervals: 141 107 110 108 105 112 MB/s
Read 483
Write 227
Mixed 167
SusWrite 114
54% 248 MB/s
4K Read 32.4
4K Write 71.8
4K Mixed 30.1
126% 44.8 MB/s
DQ Read 366
DQ Write 183
DQ Mixed 80.9
112% 210 MB/s
86GB free (System drive)
Firmware: EXT48D0Q
SusWrite @10s intervals: 195 183 147 139 133 133 MB/s
Read 439
Write 216
Mixed 176
SusWrite 155
54% 246 MB/s
4K Read 28.5
4K Write 60.6
4K Mixed 24.7
107% 37.9 MB/s
DQ Read 296
DQ Write 209
DQ Mixed 78.9
106% 195 MB/s
127GB free
Firmware: AD0Q
SusWrite @10s intervals: 252 255 253 254 254 254 MB/s
Read 340
Write 259
Mixed 182
SusWrite 254
58% 259 MB/s
4K Read 20.5
4K Write 47.5
4K Mixed 22.7
85% 30.2 MB/s
DQ Read 309
DQ Write 220
DQ Mixed 80.8
110% 203 MB/s
6,648 MORE »

 Market Share (See Leaders)

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

Typical PM851 mSATA 256GB Builds (Compare 1,970 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 6%
Tree trunk
Desktop
Desktop 50%
Yacht
Workstation
Workstation 6%
Tree trunk

System: Dell Latitude E7440

EDIT WITH CUSTOM PC BUILDER

Popular PM851 mSATA 256GB systems:

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Solid State Drive Rankings (Price vs Performance) May 2024 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

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

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i5-12600K $171Nvidia RTX 4060 $293Crucial MX500 250GB $39
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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