Average Bench: 79.4% (500th of 1080)

Based on 67,541 user benchmarks.  Models: Crucial_CT275MX300SSD1, Crucial_ CT275MX300SSD1

The 275GB Crucial MX300 supersedes the MX200. Unlike its predecessor, the MX300 is TLC based and therefore suffers from weak write speeds in comparison to MLC drives. The MX300 utilises a sophisticated algorithm to enable fast burst write speeds provided that there is sufficient free space on the disk but as the drive fills up write performance drops to the relatively poor levels seen on other TLC drives (similar to mechanical drives). At current prices (70 USD) the MX300 competes well with other low end drives such as the OCZ Trion, Adata SP550 and Samsung 750 EVO. As stocks build the MX300 is likely to see further price cuts, so it could become a very interesting value proposition. See the current value leaders here[Sep '16 SSDrivePro]

Good average bench

The Crucial MX300 275GB averaged 20.6% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Crucial MX300 275GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 245MB/s
Avg. 4K Random Write Speed 84.7MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Crucial MX300 275GB is 41.1%. This is a relatively wide range which indicates that the Crucial MX300 275GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 217MB/s
Avg. Sequential Mixed IO Speed 339MB/s

Average Bench

(Based on 67,541 samples)
Min Avg Max
347 Read 433 472
150 Write 380 478
159 Mixed 339 402
122 SusWrite 217 273
76.8% 342 MB/s
Min Avg Max
15.7 4K Read 24.2 28.2
34.7 4K Write 84.7 117
18.4 4K Mixed 33.9 41.4
125% 47.6 MB/s
Min Avg Max
123 DQ Read 216 236
83 DQ Write 257 326
59.7 DQ Mixed 245 306
182% 239 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
237GB free
Firmware: M0CR021
SusWrite @10s intervals: 481 483 484 483 472 483 MB/s
Read 426
Write 130
Mixed 158
SusWrite 481
67% 299 MB/s
4K Read 23.4
4K Write 120
4K Mixed 41
151% 61.3 MB/s
DQ Read 219
DQ Write 303
DQ Mixed 115
128% 212 MB/s
66GB free (System drive)
Firmware: M0CR070
SusWrite @10s intervals: 315 140 138 147 150 143 MB/s
Read 477
Write 332
Mixed 283
SusWrite 172
70% 316 MB/s
4K Read 27.9
4K Write 112
4K Mixed 41.3
154% 60.3 MB/s
DQ Read 235
DQ Write 272
DQ Mixed 238
184% 248 MB/s
102GB free (System drive)
Firmware: M0CR021
SusWrite @10s intervals: 385 402 266 138 139 137 MB/s
Read 424
Write 426
Mixed 365
SusWrite 244
82% 365 MB/s
4K Read 22.9
4K Write 61
4K Mixed 31.1
107% 38.3 MB/s
DQ Read 232
DQ Write 324
DQ Mixed 268
206% 275 MB/s
255GB free
Firmware: M0CR031
SusWrite @10s intervals: 335 376 381 139 144 154 MB/s
Read 332
Write 392
Mixed 301
SusWrite 255
72% 320 MB/s
4K Read 19.7
4K Write 66
4K Mixed 29.6
103% 38.4 MB/s
DQ Read 229
DQ Write 319
DQ Mixed 292
216% 280 MB/s
109GB free (System drive)
Firmware: M0CR060
SusWrite @10s intervals: 148 148 154 138 151 153 MB/s
Read 461
Write 449
Mixed 286
SusWrite 148
75% 336 MB/s
4K Read 21.9
4K Write 81.5
4K Mixed 20
102% 41.1 MB/s
DQ Read 135
DQ Write 151
DQ Mixed 115
94% 133 MB/s
67,541 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 76,410,406 SSDs tested


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MSRP ≈ $70 @ launch in Jun '16
EbayUS $10040 mins
AmazonUS $1604 mins
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Typical MX300 275GB Builds (Compare 14,206 builds) See popular component choices, score breakdowns and rankings
Gaming 68%
Battle cruiser
Desktop 86%
Aircraft carrier
Workstation 58%

Motherboard: Asus Z170 PRO GAMING - $295

EDIT WITH CUSTOM PC BUILDER Value: 72% - Very good Total price: $886

Popular MX300 275GB compatible motherboards:

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Controller: Marvell 88SS1074. Flash Memory: Micron 3D TLC

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