Average Bench: 95.9% (220th of 1011)

Based on 222 user benchmarks.  Model: JAJS300M240C

Excellent average bench

The JAJS300M240C 240GB averaged just 4.1% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the JAJS300M240C 240GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 190MB/s
Avg. 4K Random Mixed IO Speed 38.5MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the JAJS300M240C 240GB is 60.9%. This is a particularly wide range which indicates that the JAJS300M240C 240GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 378MB/s
Avg. Sequential Mixed IO Speed 389MB/s

Average Bench

(Based on 222 samples)
Min Avg Max
373 Read 478 513
260 Write 402 466
254 Mixed 389 483
143 SusWrite 378 453
92.6% 412 MB/s
Min Avg Max
15.4 4K Read 29.6 39.3
35 4K Write 79.3 110
14.3 4K Mixed 38.5 53.5
136% 49.1 MB/s
Min Avg Max
32.4 DQ Read 243 383
64.8 DQ Write 284 355
17.1 DQ Mixed 190 278
163% 239 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
188GB free (System drive)
Firmware: R0412A0
SusWrite @10s intervals: 404 362 420 420 425 431 MB/s
Read 505
Write 378
Mixed 395
SusWrite 410
95% 422 MB/s
4K Read 31.7
4K Write 89.2
4K Mixed 27.7
131% 49.5 MB/s
DQ Read 169
DQ Write 304
DQ Mixed 41.3
87% 172 MB/s
187GB free (System drive)
Firmware: R0412A0
SusWrite @10s intervals: 241 252 238 233 267 119 MB/s
Read 354
Write 316
Mixed 293
SusWrite 225
67% 297 MB/s
4K Read 15.1
4K Write 39.6
4K Mixed 13.5
61% 22.7 MB/s
DQ Read 29.6
DQ Write 91
DQ Mixed 20.3
27% 47 MB/s
222 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 17,666,076 SSDs tested.

Typical JAJS300M240C 240GB Builds (Compare 2,126 builds) See popular component choices, score breakdowns and rankings.
Gaming 54%
Desktop 70%
Workstation 59%

Motherboard: Asrock B450M-HDV

EDIT WITH CUSTOM PC BUILDER Value: 87% - Excellent Total price: $365

Popular JAJS300M240C 240GB compatible motherboards:

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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 2019 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]


Group Test Results

  • 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.


1011 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-9400F $140Nvidia GTX 1660 $220Samsung 850 Evo 250GB $70
Intel Core i5-9600K $225Nvidia GTX 1660-Ti $278Samsung 850 Evo 500GB $105
AMD Ryzen 5 3600 $195Nvidia RTX 2060S (Super) $429Samsung 850 Pro 256GB $203
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3000 C15 2x8GB $70SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $34G.SKILL Trident Z DDR4 3200 C14 4x16GB $606SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $64Corsair Vengeance LPX DDR4 3200 C16 2x8GB $73SanDisk Extreme 16GB $24
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