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CrucialCT240BX300SSD1
CrucialCT275MX300SSD1
▲ 5138 ▼

Controller: Silicon Motion SM2258. Flash Memory: Micron 3D MLC. Release date: Q3 2017.

VS
▲ 552,236 ▼

Controller: Marvell 88SS1074. Flash Memory: Micron 3D TLC. Release date: Q2 2016.

Effective Speed 
+19%
Real World Speed
Performance profile from 74,810 user samples
Benchmark your SSD here
7,269 User Benchmarks
Best Bench: 114% 223GB free
Worst Bench: 65% 75GB free (System drive)
Poor: 65% Great: 114%
SPEED RANK: 283rd / 1072
67,541 User Benchmarks
Best Bench: 95% 67GB free
Worst Bench: 53% 38GB free (System drive)
Poor: 53% Great: 95%
SPEED RANK: 492nd / 1072
Effective Speed
Effective SSD Speed 		94.5 % Faster effective speed.
+19% 		79.4 %
Average Score 
+16%
Read
Avg. Sequential Read Speed 		473 MB/s Slightly faster read speed.
+9% 		433 MB/s
Write
Avg. Sequential Write Speed 		407 MB/s Slightly faster write speed.
+7% 		380 MB/s
4K Read
Avg. 4K Random Read Speed 		27.3 MB/s Faster random read.
+13% 		24.2 MB/s
4K Write
Avg. 4K Random Write Speed 		80.2 MB/s 84.7 MB/s Slightly faster random write.
+6%
Mixed
Avg. Sequential Mixed IO Speed 		365 MB/s Slightly faster mixed IO speed.
+8% 		339 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		39 MB/s Faster random mixed IO.
+15% 		33.9 MB/s
SusWrite
Avg. Sustained Write Speed 		355 MB/s Much faster sustained write speed.
+64% 		217 MB/s
Peak Score 
+17%
Read
Peak Sequential Read Speed 		514 MB/s Slightly faster peak read speed.
+9% 		472 MB/s
Write
Peak Sequential Write Speed 		473 MB/s 478 MB/s +1%
4K Read
Peak 4K Random Read Speed 		32.9 MB/s Faster peak random read.
+17% 		28.2 MB/s
4K Write
Peak 4K Random Write Speed 		118 MB/s +1% 117 MB/s
Mixed
Peak Sequential Mixed IO Speed 		443 MB/s Faster peak mixed IO speed.
+10% 		402 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		49.7 MB/s Faster peak random mixed IO.
+20% 		41.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		446 MB/s Much faster peak sustained write speed.
+63% 		273 MB/s
Value & Sentiment 
+37%
Market Share
Based on 75,649,355 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.04 % Hugely higher market share.
+300%
Value
Value For Money 		22.3 % Hugely better value.
+102% 		11 %
User Rating
UBM User Rating 		51 % 55 % Slightly more popular.
+8%
Price
Price (score) 		$43 Much cheaper.
+57% 		$100
Nice To Haves 
+14%
Age
Newest 		80 Months More recent.
+15% 		94 Months
DQ Read
Peak 4K-64Thread Read Speed 		316 MB/s Much faster peak deep queue read.
+34% 		236 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		363 MB/s Faster peak deep queue write.
+11% 		326 MB/s
AS-SSD Total
AS-SSD Total Score 		1,143 Pts Stronger server IO.
+18% 		972 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		299 MB/s 306 MB/s +2%
ADQ Read
Avg. 4K-64Thread Read Speed 		280 MB/s Faster deep queue read.
+30% 		216 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		279 MB/s Slightly faster deep queue write.
+9% 		257 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		243 MB/s 245 MB/s +1%
Specifications 
Capacity
Capacity 		240GB 275GB
Conclusion 
Average Bench 94.5%
Average Bench 79.4%
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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

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

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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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  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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Welcome to our 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 value for money upgrades.

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  • - Download and run UserBenchmark
  • - CPU tests include: integer, floating and string
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  • - Reports are generated and presented on userbenchmark.com
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 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
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Solid State Drives
What is the SSD value for money rating?
What is 4K 64 thread write speed?
Can CPU power saving states (C1,C2,C3) impact SSD speed?
What is the effective SSD speed index?
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 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $279Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $184Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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