TEST
YOUR USB

Samsung (ExtHD)

SSD 840 EVO 250G 250GB

▲ 500 ▼

Release date ≈ Q4 2015.

Average Bench: 56.3% (20th of 639)

Based on 15 user benchmarks.  Device: VID 152d PID 2329 Model: Samsung SSD 840 EVO 250G
Poor: 8%Average: 56.3% Great: 79%

Average average bench

The Samsung SSD 840 EVO 250G 250GB averaged 43.7% 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 Write Speed 18.6MB/s
Avg. 4K-64Thread Mixed IO Speed 14.2MB/s

Very poor consistency

The range of scores (95th - 5th percentile) for the Samsung SSD 840 EVO 250G 250GB is 71.3%. This is a particularly wide range which indicates that the Samsung SSD 840 EVO 250G 250GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 33.6MB/s
Avg. Sustained Write Speed 30MB/s
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Average Bench

(Based on 15 samples)
Rank 2056.3%
Min Avg Max
8 Read 33.6 42.8
8.5 Write 31.4 41.8
8.3 Mixed 32.2 42.5
12.7 SusWrite 30 42.7
43.2% 31.8 MB/s
Min Avg Max
0.2 4K Read 10.6 15.2
0.3 4K Write 13.7 19.8
0.6 4K Mixed 11 16.5
880% 11.8 MB/s
Min Avg Max
10.1 DQ Read 13.9 16
13.9 DQ Write 18.6 20.9
8.82 DQ Mixed 14.2 17.5
1,167% 15.6 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
176GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 37 43 43 42 42 42 MB/s
79.2% Very good
Read 40.8
Write 41.3
Mixed 40.7
SusWrite 41.6
56% 41.1 MB/s
4K Read 14.3
4K Write 19.8
4K Mixed 16.2
1,278% 16.8 MB/s
DQ Read 15.2
DQ Write 20
DQ Mixed 17.2
1,322% 17.5 MB/s
187GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 42 43 43 43 43 43 MB/s
77.5% Very good
Read 41.7
Write 42.7
Mixed 42.5
SusWrite 42.6
58% 42.4 MB/s
4K Read 14.6
4K Write 19.1
4K Mixed 16.3
1,258% 16.7 MB/s
DQ Read 15.4
DQ Write 20.4
DQ Mixed 17.2
1,336% 17.7 MB/s
172GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 41 42 42 42 43 42 MB/s
77.3% Very good
Read 38.3
Write 36.8
Mixed 37.3
SusWrite 42.2
53% 38.6 MB/s
4K Read 15.2
4K Write 19.2
4K Mixed 16.5
1,271% 17 MB/s
DQ Read 16
DQ Write 20.4
DQ Mixed 17.2
1,338% 17.9 MB/s
40GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 39 38 37 37 37 37 MB/s
76% Very good
Read 35.7
Write 37
Mixed 35.3
SusWrite 37.3
50% 36.3 MB/s
4K Read 13.1
4K Write 19.4
4K Mixed 12.3
1,127% 14.9 MB/s
DQ Read 13.2
DQ Write 17.5
DQ Mixed 14.8
1,148% 15.2 MB/s
69GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 33 33 33 34 34 34 MB/s
74% Very good
Read 36.8
Write 33.9
Mixed 35
SusWrite 33.4
47% 34.8 MB/s
4K Read 14
4K Write 18.9
4K Mixed 16.1
1,242% 16.3 MB/s
DQ Read 15.3
DQ Write 20.8
DQ Mixed 17.3
1,353% 17.8 MB/s
46GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 15 15 15 15 15 15 MB/s
52.3% Above average
Read 37.5
Write 29.6
Mixed 32.8
SusWrite 15.2
37% 28.8 MB/s
4K Read 11.4
4K Write 13.3
4K Mixed 12.9
933% 12.5 MB/s
DQ Read 12.2
DQ Write 17.4
DQ Mixed 13.9
1,110% 14.5 MB/s
64GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 15 15 15 15 15 15 MB/s
51.3% Above average
Read 35.5
Write 29.5
Mixed 32.5
SusWrite 15.3
37% 28.2 MB/s
4K Read 12.1
4K Write 13
4K Mixed 13.2
936% 12.8 MB/s
DQ Read 14.3
DQ Write 18.4
DQ Mixed 15.7
1,213% 16.1 MB/s
28GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 39 39 39 39 39 39 MB/s
45.5% Average
Read 37.6
Write 36.7
Mixed 36.3
SusWrite 38.8
51% 37.4 MB/s
4K Read 8.9
4K Write 9.6
4K Mixed 9.6
686% 9.37 MB/s
DQ Read 10.1
DQ Write 13.9
DQ Mixed 11.2
891% 11.7 MB/s
40GB free, PID 2329
Operating at USB 2.0 Speed
SusWrite @10s intervals: 13 18 16 10 10 9.7 MB/s
4.9% Terrible
Read 8
Write 8.5
Mixed 8.3
SusWrite 12.7
13% 9.38 MB/s
4K Read 0.2
4K Write 0.3
4K Mixed 1.6
65% 0.7 MB/s
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