CrucialCT275MX300SSD1
CrucialCT240BX300SSD1

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

Controller: Silicon Motion SM2258. Flash Memory: Micron 3D MLC.

Real World Speed
Performance profile from 12,815 user samples
12,188 User Benchmarks
Best Bench: 81% 70GB free
Worst Bench: 50% 140GB free
Poor: 50% Great: 81%
SPEED RANK: 367th / 873
627 User Benchmarks
Best Bench: 112% 187GB free
Worst Bench: 66% 98GB free
Poor: 66% Great: 112%
SPEED RANK: 88th / 873
Effective Speed
Effective SSD Speed
68.4 % -32% 90.5 % Much faster effective speed.
+32%
Read
Avg. Sequential Read Speed
464 MB/s -9% 504 MB/s Slightly faster read speed.
+9%
Write
Avg. Sequential Write Speed
301 MB/s -48% 444 MB/s Much faster write speed.
+48%
4K Read
Avg. 4K Random Read Speed
22.4 MB/s -15% 25.7 MB/s Slightly faster random read.
+15%
4K Write
Avg. 4K Random Write Speed
57.5 MB/s -35% 77.4 MB/s Much faster random write.
+35%
Mixed
Avg. Sequential Mixed IO Speed
309 MB/s -55% 478 MB/s Much faster mixed IO speed.
+55%
4K Mixed
Avg. 4K Random Mixed IO Speed
17.1 MB/s -70% 29 MB/s Much faster random mixed IO.
+70%
Read
Peak Sequential Read Speed
485 MB/s -9% 527 MB/s Slightly faster peak read speed.
+9%
Write
Peak Sequential Write Speed
338 MB/s -45% 490 MB/s Much faster peak write speed.
+45%
4K Read
Peak 4K Random Read Speed
27.4 MB/s -20% 33 MB/s Faster peak random read.
+20%
4K Write
Peak 4K Random Write Speed
79.5 MB/s -48% 118 MB/s Much faster peak random write.
+48%
Mixed
Peak Sequential Mixed IO Speed
339 MB/s -51% 513 MB/s Much faster peak mixed IO speed.
+51%
4K Mixed
Peak 4K Random Mixed IO Speed
24.1 MB/s -81% 43.6 MB/s Hugely faster peak random mixed IO.
+81%
Market Share
Based on 5,182,635 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.83 % Hugely higher market share.
+246%
0.24 % -246%
Value
Value For Money
80.4 % -15% 92.7 % Better value.
+15%
User Rating
UBM User Rating
66 % More popular.
+27%
52 % -27%
Price
Price (score)
$84 +5% $88 -5%
Age
Newest
19 Months -74% 5 Months Much more recent.
+74%
DQ Read
Peak 4K-64Thread Read Speed
230 MB/s -36% 312 MB/s Much faster peak deep queue read.
+36%
DQ Write
Peak 4K-64Thread Write Speed
219 MB/s -55% 339 MB/s Much faster peak deep queue write.
+55%
AS-SSD Total
AS-SSD Total Score
798 Pts -40% 1,117 Pts Much stronger server IO.
+40%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
40.4 MB/s -170% 109 MB/s Hugely faster peak deep queue mixed IO.
+170%
ADQ Read
Avg. 4K-64Thread Read Speed
130 MB/s -16% 151 MB/s Faster deep queue read.
+16%
ADQ Write
Avg. 4K-64Thread Write Speed
133 MB/s -42% 189 MB/s Much faster deep queue write.
+42%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
26.5 MB/s -123% 59.2 MB/s Hugely faster deep queue mixed IO.
+123%
Capacity
Capacity
275GB 240GB
ADVERTISEMENT

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]

MORE DETAILS

Crucial’s BX300 SSD is a 3D MLC entry level SSD, with debut pricing in line with the Samsung's 850 Evo, the current market leader. The BX300 is the fastest consumer MLC SSD available, with a 2% performance improvement over Crucial’s older MLC based MX200 and a 25% performance improvement over the TLC based MX300 which are both from Crucial’s more expensive MX product line. MLC NAND offers more consistent performance and has higher endurance than TLC NAND. Although Samsung’s 850 Evo (which is based on proprietary TLC V-NAND) has a 10% effective speed advantage over the BX300 the BX300 wins on write consistency. The 240GB BX300 has a three year warranty or 80 Terabytes Written (TBW) compared to five years or 75 (TBW) for the 250 GB 850 Evo. This makes for an interesting choice between the BX300 and the 850 Evo. Each model has an SLC cache which is proportional to its capacity, as a result the larger capacities offer better performance. The 120 GB BX300 has a 4 GB SLC cache, the 240 GB has 8 GB and the 480 GB has 16 GB. SLC caches improve burst write performance beyond the already respectable MLC write performance. Unfortunately, at least for now, the BX300 only comes in modest capacities, with the largest being 480 GB. For write consistency, thanks to its MLC NAND, the BX300 punches well above its price point. [Nov '17 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) January 2018 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-7700K $314Nvidia GTX 1070 $139Samsung 850 Evo 250GB $87
AMD Ryzen 7 1700 $294Nvidia GTX 1060-6GB $95Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback