CrucialCT275MX300SSD1
SanDiskSDSSDHII-240G-G25

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

Controller: Marvell 88SS9187. Memory: SanDisk 19nm TLC.

Real World Speed
Performance profile from 18,868 user samples
7,246 User Benchmarks
Best Bench: 81% 42GB free
Worst Bench: 47% 187GB free
Poor: 47% Great: 81%
SPEED RANK: 360th / 860
11,622 User Benchmarks
Best Bench: 83% 221GB free
Worst Bench: 48% 203GB free
Poor: 48% Great: 83%
SPEED RANK: 413th / 860
Effective Speed
Effective SSD Speed
68 % +4% 65.6 % -4%
Read
Avg. Sequential Read Speed
464 MB/s +2% 456 MB/s -2%
Write
Avg. Sequential Write Speed
299 MB/s Faster write speed.
+22%
246 MB/s -22%
4K Read
Avg. 4K Random Read Speed
22.4 MB/s -24% 27.7 MB/s Faster random read.
+24%
4K Write
Avg. 4K Random Write Speed
58.1 MB/s Slightly faster random write.
+15%
50.7 MB/s -15%
Mixed
Avg. Sequential Mixed IO Speed
306 MB/s Faster mixed IO speed.
+28%
239 MB/s -28%
4K Mixed
Avg. 4K Random Mixed IO Speed
16.5 MB/s Slightly faster random mixed IO.
+11%
14.8 MB/s -11%
Read
Peak Sequential Read Speed
485 MB/s -3% 499 MB/s +3%
Write
Peak Sequential Write Speed
339 MB/s -1% 341 MB/s +1%
4K Read
Peak 4K Random Read Speed
27.7 MB/s -35% 37.3 MB/s Much faster peak random read.
+35%
4K Write
Peak 4K Random Write Speed
81.7 MB/s +0% 81.4 MB/s -0%
Mixed
Peak Sequential Mixed IO Speed
339 MB/s +5% 324 MB/s -5%
4K Mixed
Peak 4K Random Mixed IO Speed
24.2 MB/s Faster peak random mixed IO.
+15%
21 MB/s -15%
Market Share
Based on 4,120,634 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.98 % Hugely higher market share.
+151%
0.39 % -151%
Value
Value For Money
74.7 % Slightly better value.
+12%
67 % -12%
User Rating
UBM User Rating
65 % +3% 63 % -3%
Price
Price (score)
$92 -4% $88 +4%
Age
Newest
16 Months Much more recent.
+57%
37 Months -57%
DQ Read
Peak 4K-64Thread Read Speed
229 MB/s -59% 364 MB/s Much faster peak deep queue read.
+59%
DQ Write
Peak 4K-64Thread Write Speed
218 MB/s Slightly faster peak deep queue write.
+6%
205 MB/s -6%
AS-SSD Total
AS-SSD Total Score
798 Pts -26% 1,008 Pts Stronger server IO.
+26%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
40.3 MB/s -27% 51.2 MB/s Faster peak deep queue mixed IO.
+27%
ADQ Read
Avg. 4K-64Thread Read Speed
128 MB/s -38% 176 MB/s Much faster deep queue read.
+38%
ADQ Write
Avg. 4K-64Thread Write Speed
134 MB/s +4% 129 MB/s -4%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
24.1 MB/s -26% 30.4 MB/s Faster deep queue mixed IO.
+26%
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

The Sandisk Ultra II sits above Sandisk's Ultra Plus and below their Extreme Pro. The Ultra Plus would probably have been phased out completely were it not for its continued success within budget space. The Ultra II is the first Sandisk drive to utilize cheaper (and slower) TLC NAND. Similarly to the Extreme Pro, the Ultra II utilizes an nCache which operates a portion of the NAND in simulated SLC mode. This strategy also matches the one employed by Samsung's now 14 months old Evo. Comparing the Ultra II and Evo shows broad performance equivalence which given the Ultra II's 15% price discount makes it the better choice today. That said it's probably worth waiting for the release of the 850 Evo which will pack another 14 months of Samsung's market leading R&D and will probably steal the show. [Sep '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) October 2017 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 $300Nvidia GTX 1070 $394Samsung 850 Evo 250GB $98
AMD Ryzen 7 1700 $280AMD RX 480 $491Samsung 850 Pro 256GB $126
Intel Core i5-7600K $230Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $163SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $842SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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