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 19,925 user samples
18,240 User Benchmarks
Best Bench: 81% 56GB free
Worst Bench: 49% 147GB free
Poor: 49% Great: 81%
SPEED RANK: 457th / 929
1,685 User Benchmarks
Best Bench: 99% 128GB free
Worst Bench: 57% 148GB free
Poor: 57% Great: 99%
SPEED RANK: 247th / 929
Effective Speed
Effective SSD Speed
67.4 % 80.2 % Faster effective speed.
+19%
Read
Avg. Sequential Read Speed
465 MB/s 504 MB/s Slightly faster read speed.
+8%
Write
Avg. Sequential Write Speed
295 MB/s 368 MB/s Faster write speed.
+25%
4K Read
Avg. 4K Random Read Speed
22.3 MB/s 26 MB/s Faster random read.
+17%
4K Write
Avg. 4K Random Write Speed
56.7 MB/s 63.9 MB/s Slightly faster random write.
+13%
Mixed
Avg. Sequential Mixed IO Speed
304 MB/s 393 MB/s Faster mixed IO speed.
+29%
4K Mixed
Avg. 4K Random Mixed IO Speed
16.6 MB/s 23.5 MB/s Much faster random mixed IO.
+42%
Read
Peak Sequential Read Speed
485 MB/s 527 MB/s Slightly faster peak read speed.
+9%
Write
Peak Sequential Write Speed
339 MB/s 407 MB/s Faster peak write speed.
+20%
4K Read
Peak 4K Random Read Speed
27.2 MB/s 33.1 MB/s Faster peak random read.
+22%
4K Write
Peak 4K Random Write Speed
78 MB/s 96.7 MB/s Faster peak random write.
+24%
Mixed
Peak Sequential Mixed IO Speed
338 MB/s 425 MB/s Faster peak mixed IO speed.
+26%
4K Mixed
Peak 4K Random Mixed IO Speed
23.9 MB/s 36.3 MB/s Much faster peak random mixed IO.
+52%
Market Share
Based on 7,154,605 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.59 % Insanely higher market share.
+1,375%
0.04 %
Value
Value For Money
80.6 % 92.9 % Better value.
+15%
User Rating
UBM User Rating
67 % More popular.
+26%
53 %
Price
Price (score)
$82 $75 Slightly cheaper.
+9%
Age
Newest
24 Months 10 Months Much more recent.
+58%
DQ Read
Peak 4K-64Thread Read Speed
230 MB/s 312 MB/s Much faster peak deep queue read.
+36%
DQ Write
Peak 4K-64Thread Write Speed
216 MB/s 278 MB/s Faster peak deep queue write.
+29%
AS-SSD Total
AS-SSD Total Score
793 Pts 1,023 Pts Stronger server IO.
+29%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
40.3 MB/s 90.2 MB/s Hugely faster peak deep queue mixed IO.
+124%
ADQ Read
Avg. 4K-64Thread Read Speed
121 MB/s 139 MB/s Slightly faster deep queue read.
+15%
ADQ Write
Avg. 4K-64Thread Write Speed
131 MB/s 150 MB/s Slightly faster deep queue write.
+15%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
24.4 MB/s 47.1 MB/s Hugely faster deep queue mixed IO.
+93%
Capacity
Capacity
275GB 240GB
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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 one of the faster consumer SSDs 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) June 2018 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]

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Group Test Results

  • Best user rated - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.
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
AMD Ryzen 5 1600 $175Nvidia GTX 1070 $447Samsung 850 Evo 250GB $104
Intel Core i7-8700K $320Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $110
Intel Core i5-8600K $239AMD RX 480 $280Samsung 850 Pro 256GB $116
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $58HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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