Average Bench: 52.7% (681st of 921)

Based on 322 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 47.2% 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 24.3MB/s
Avg. 4K Random Write Speed 59.4MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Crucial RealSSD C300 256GB is 26.2%. 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 4.09MB/s
Avg. 4K-64Thread Mixed IO Speed 12.5MB/s

Average Bench

(Based on 322 samples)
Min Avg Max
310 Read 343 354
163 Write 205 220
183 Mixed 247 270
58.7% 265 MB/s
Min Avg Max
12.4 4K Read 24.3 32.7
5.87 4K Write 59.4 101
2.23 4K Mixed 4.09 4.79
73.4% 29.3 MB/s
Min Avg Max
19 DQ Read 137 223
50.6 DQ Write 148 192
3.22 DQ Mixed 12.5 19.2
45.3% 99.2 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
18GB free
Firmware: 0007 Max speed: SATA 3.0 600 MB/s
Read 353
Write 214
Mixed 264
61% 277 MB/s
4K Read 29.8
4K Write 72.8
4K Mixed 4.63
90% 35.8 MB/s
DQ Read 225
DQ Write 185
DQ Mixed 17.8
64% 143 MB/s
90GB free
Firmware: 0001 Max speed: SATA 3.0 600 MB/s
Read 347
Write 214
Mixed 261
61% 274 MB/s
4K Read 25.4
4K Write 65.5
4K Mixed 4.32
79% 31.7 MB/s
DQ Read 205
DQ Write 133
DQ Mixed 3.05
47% 114 MB/s
322 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 6,418,470 SSDs tested.


Approx. $362 @ launch in Feb '10
AmazonUS $18811 months
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Typical RealSSD C300 256GB Builds (Compare 1,786 builds) See popular component choices, score breakdowns and rankings.
Gaming 62%
Desktop 71%
Workstation 54%

Motherboard: Asrock Z97 Extreme6 - $162

EDIT WITH CUSTOM PC BUILDER Value: 64% - Good Total price: $1,096

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) April 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]

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.


Controller: Marvel First Gen Memory: Synchronous MLC NAND

Improved Data Transfers...

Added 6 years ago.

Poor (edit your comment) Add link

10 months ago.

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


5 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


3 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)

921 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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