TEST
YOUR USB

Crucial_ (ExtHD)

CT256MX100SSD1 256GB

▲ 500 ▼

Release date ≈ Q4 2014.

Average Bench: 199% (1st of 639)

Based on 12 user benchmarks.  Device: VID 174c PID 55aa Model: Crucial_ CT256MX100SSD1
Poor: 146%Average: 199% Great: 307%

Outstanding average bench

The Crucial_ CT256MX100SSD1 256GB averaged 99.2% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Crucial_ CT256MX100SSD1 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 49MB/s
Avg. 4K Random Write Speed 36.2MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Crucial_ CT256MX100SSD1 256GB is 161%. This is a particularly wide range which indicates that the Crucial_ CT256MX100SSD1 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Read Speed 230MB/s
Avg. 4K Random Read Speed 18.3MB/s
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Average Bench

(Based on 12 samples)
Rank 1199%
Min Avg Max
155 Read 230 342
172 Write 243 330
61.1 Mixed 185 280
189 SusWrite 229 332
302% 222 MB/s
Min Avg Max
12.8 4K Read 18.3 25.1
18.9 4K Write 36.2 78.1
11.9 4K Mixed 16.6 29.9
1,862% 23.7 MB/s
Min Avg Max
17.2 DQ Read 20.8 26.7
28.8 DQ Write 49 87.1
11.3 DQ Mixed 19.4 35.5
2,404% 29.7 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest USB (mainstream) averages a speed of 100%
168GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 322 334 333 334 333 334 MB/s
307% Outstanding
Read 342
Write 330
Mixed 280
SusWrite 332
436% 321 MB/s
4K Read 22.2
4K Write 58.6
4K Mixed 29.9
3,092% 36.9 MB/s
DQ Read 26.2
DQ Write 78.7
DQ Mixed 35.5
3,982% 46.8 MB/s
116GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 230 235 235 238 239 237 MB/s
168% Outstanding
Read 242
Write 237
Mixed 207
SusWrite 236
314% 230 MB/s
4K Read 17.1
4K Write 25.1
4K Mixed 19.9
1,594% 20.7 MB/s
DQ Read 19.7
DQ Write 38.8
DQ Mixed 24.8
2,236% 27.8 MB/s
238GB free, PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 229 227 223 207 208 188 MB/s
161% Outstanding
Read 236
Write 231
Mixed 211
SusWrite 214
302% 223 MB/s
4K Read 17.1
4K Write 24.9
4K Mixed 19.7
1,580% 20.6 MB/s
DQ Read 18.6
DQ Write 37.2
DQ Mixed 23.7
2,140% 26.5 MB/s
114GB free (System drive), PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 231 219 213 200 202 203 MB/s
151% Outstanding
Read 267
Write 255
Mixed 231
SusWrite 211
324% 241 MB/s
4K Read 14.1
4K Write 20.4
4K Mixed 12.7
1,178% 15.7 MB/s
DQ Read 18.2
DQ Write 36.1
DQ Mixed 22.3
2,054% 25.5 MB/s
151GB free (System drive), PID 55aa
Operating at USB 3.0 Speed
SusWrite @10s intervals: 192 187 194 191 185 183 MB/s
146% Outstanding
Read 247
Write 234
Mixed 218
SusWrite 189
298% 222 MB/s
4K Read 15.1
4K Write 21.3
4K Mixed 17.4
1,372% 17.9 MB/s
DQ Read 18.1
DQ Write 29.9
DQ Mixed 21.4
1,812% 23.1 MB/s
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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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