TEST
YOUR USB

Samsung (ExtHD)

SSD 840 250GB

▲ 500 ▼

Release date ≈ Q2 2015.

Average Bench: 125% (3rd of 639)

Based on 15 user benchmarks.  Device: VID 2537 PID 1066 Model: Samsung SSD 840
Poor: 24%Average: 125% Great: 197%

Outstanding average bench

The Samsung SSD 840 250GB averaged 24.8% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung SSD 840 250GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 31MB/s
Avg. 4K Random Write Speed 20.9MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Samsung SSD 840 250GB is 173%. This is a particularly wide range which indicates that the Samsung SSD 840 250GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 182MB/s
Avg. 4K Random Read Speed 16MB/s
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Average Bench

(Based on 15 samples)
Rank 3125%
Min Avg Max
25.3 Read 182 372
24.7 Write 183 381
2.3 Mixed 151 324
24.4 SusWrite 123 290
214% 160 MB/s
Min Avg Max
0.9 4K Read 16 23.2
4.55 4K Write 20.9 39.1
2.6 4K Mixed 14.9 24.3
1,278% 17.3 MB/s
Min Avg Max
8.9 DQ Read 20.2 28.8
21.6 DQ Write 31 47.7
9 DQ Mixed 18.4 27.2
1,757% 23.2 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
109GB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 353 278 277 277 278 277 MB/s
203% Outstanding
Read 372
Write 374
Mixed 324
SusWrite 290
459% 340 MB/s
4K Read 23.2
4K Write 26
4K Mixed 24.3
1,797% 24.5 MB/s
DQ Read 24.8
DQ Write 32.3
DQ Mixed 27.2
2,116% 28.1 MB/s
204GB free (System drive), PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 300 225 276 270 274 274 MB/s
197% Outstanding
Read 368
Write 352
Mixed 291
SusWrite 270
428% 320 MB/s
4K Read 21.3
4K Write 26
4K Mixed 23.2
1,752% 23.5 MB/s
DQ Read 22.9
DQ Write 26.5
DQ Mixed 24.2
1,809% 24.5 MB/s
101GB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 194 152 88 73 72 64 MB/s
158% Outstanding
Read 352
Write 363
Mixed 288
SusWrite 107
363% 278 MB/s
4K Read 22
4K Write 25.4
4K Mixed 23.7
1,752% 23.7 MB/s
DQ Read 25.2
DQ Write 38.4
DQ Mixed 23.9
2,212% 29.2 MB/s
232GB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 343 177 257 258 258 258 MB/s
148% Outstanding
Read 52.8
Write 381
Mixed 77.2
SusWrite 258
297% 192 MB/s
4K Read 15.6
4K Write 26
4K Mixed 15.9
1,483% 19.2 MB/s
DQ Read 8.9
DQ Write 26.3
DQ Mixed 16.9
1,502% 17.4 MB/s
69GB free, PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 236 119 115 109 108 106 MB/s
143% Outstanding
Read 241
Write 229
Mixed 216
SusWrite 132
272% 204 MB/s
4K Read 17.9
4K Write 24.4
4K Mixed 21.2
1,617% 21.2 MB/s
DQ Read 21.7
DQ Write 37.6
DQ Mixed 26.4
2,257% 28.6 MB/s
139GB free (System drive), PID 1066
Operating at USB 3.0 Speed
SusWrite @10s intervals: 21 25 26 27 26 22 MB/s
78.6% Very good
Read 198
Write 29.3
Mixed 46
SusWrite 24.4
73% 74.3 MB/s
4K Read 6.6
4K Write 14
4K Mixed 5.8
698% 8.8 MB/s
DQ Read 15.7
DQ Write 21.8
DQ Mixed 9
1,106% 15.5 MB/s
86GB free, PID 1066
Operating at USB 2.1 Speed
SusWrite @10s intervals: 39 42 42 42 42 42 MB/s
65.9% Good
Read 42.2
Write 42.5
Mixed 42.4
SusWrite 41.4
58% 42.1 MB/s
4K Read 17.3
4K Write 15.2
4K Mixed 16.2
1,132% 16.2 MB/s
DQ Read 16.5
DQ Write 21.9
DQ Mixed 18.5
1,435% 19 MB/s
55GB free, PID 1066
Operating at USB 2.1 Speed
SusWrite @10s intervals: 28 27 28 28 28 28 MB/s
24.1% Poor
Read 25.3
Write 24.7
Mixed 2.3
SusWrite 27.9
26% 20 MB/s
4K Read 0.9
4K Write 4.6
4K Mixed 2.9
258% 2.8 MB/s
15 MORE »
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