Average Bench: 52.8% (598th of 850)

Based on 208 user benchmarks.  Model: C300-CTFDDAC256MAG

Before looking at the benchmarks for this drive it's worth noting that it is nearly three years old, a lifetime in SSD's. The Crucial C300 demonstrated a transfer speed of 309.1 MB/s on the real world speed test. The AS-SSD total scores was comparably poor coming in at 640 points. By today's standards this drive is terrible but it is included in the group test simply as a reference because it was once one of the best solid state drives available. [Apr '13 SSDrivePro]


Average average bench

The Crucial RealSSD C300 256GB averaged 47.1% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.


Avg. 4K Random Read Speed 24.5MB/s
Avg. 4K Random Write Speed 60.1MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Crucial RealSSD C300 256GB is 27.4%. This is a relatively narrow range which indicates that the Crucial RealSSD C300 256GB performs reasonably consistently under varying real world conditions.


Avg. 4K Random Mixed IO Speed 4.12MB/s
Avg. 4K-64Thread Mixed IO Speed 13MB/s

Average Bench

(Based on 208 samples)
Min Avg Max
310 Read 343 354
145 Write 203 220
174 Mixed 247 270
58.4% 264 MB/s
Min Avg Max
12.6 4K Read 24.5 33
9.26 4K Write 60.1 102
2.22 4K Mixed 4.12 4.81
74.1% 29.6 MB/s
Min Avg Max
18.9 DQ Read 140 224
52 DQ Write 147 193
3.4 DQ Mixed 13 19.2
45.9% 100 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
238GB free
Firmware: 0006 Max speed: SATA 3.0 600 MB/s
Read 346
Write 218
Mixed 269
62% 278 MB/s
4K Read 25.4
4K Write 74
4K Mixed 3.54
82% 34.3 MB/s
DQ Read 173
DQ Write 193
DQ Mixed 17.7
59% 128 MB/s
15GB free
Firmware: 0007 Max speed: SATA 3.0 600 MB/s
Read 351
Write 216
Mixed 238
59% 268 MB/s
4K Read 15.3
4K Write 55
4K Mixed 4.5
58% 24.9 MB/s
DQ Read 220
DQ Write 159
DQ Mixed 12.1
57% 130 MB/s
126GB free
Firmware: 0007 Max speed: SATA 3.0 600 MB/s
Read 338
Write 212
Mixed 268
60% 272 MB/s
4K Read 18.2
4K Write 41.8
4K Mixed 3.45
54% 21.2 MB/s
DQ Read 124
DQ Write 141
DQ Mixed 16.7
45% 93.8 MB/s
208 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 2,858,783 SSDs tested.


AmazonUS $187.7719 days ago.
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Typical RealSSD C300 256GB Builds (Compare 1,291 builds) See popular component choices, score breakdowns and rankings.
Gaming 62%
Desktop 71%
Workstation 54%

Motherboard: Asrock Z97 Extreme6 - $167

EDIT WITH CUSTOM PC BUILDER Value: 66% - Good Total price: $1,088

Popular RealSSD C300 256GB 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 (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.
Solid State Drive Rankings (Price vs Performance) May 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]


Controller: Marvel First Gen Memory: Synchronous MLC NAND

Improved Data Transfers...

Added 5 years ago.

Poor (edit your comment) Add link

7 days ago.

Reliable and in real world terms, I've never had to wait for it so it's fast enough for me.


4 years ago.

Review  www.tweaktown.com/...

Image  images.tweaktown.com/...
AS SSD Benchmark Speed Test

AS SSD Benchmark Speed Test

Review  www.legitreviews.com/...

Image  www.legitreviews.com/...
Feb '10 AS SSD Benchmark Speed Test

Feb '10 AS SSD Benchmark Speed Test


2 years ago.

i had this SSD and as the userbench shows its poor for a SSD, even noticeable when doing a read and write operation, any other SSD after the c300 have been fine (accept the V4 witch was another poor dive)

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850 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.

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