We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message
Solid-state drives Reviews
15,670 Reviews PC Advisor Best Buy Award

Crucial RealSSD C300 review

£355.74 inc VAT

Manufacturer: Crucial

Our Rating: We rate this 4.5 out of 5

Crucial's RealSSD C300 stands out from almost every other SSD currently available by its use of a super-fast SATA 6Gbps interface bus.

Crucial's RealSSD C300 stands out from almost every other SSD currently available by its use of a super-fast SATA 6Gbps interface bus.

Crucial is well-known as a supplier of RAM memory for PCs, and is part of the Lexar Media group that also makes USB flash storage and memory cards. Both companies’ parent is Micron Technology, a multi-national famed for its semiconductor devices.

Crucial's RealSSD C300 stands out from almost every other SSD currently available by its use of a super-fast SATA 6Gbps interface bus. Most modern PCs use storage drives attached to a SATA 3Gbps bus, and while this is ample wide enough for the transfer limits of most traditional hard disks, the new wave of super-fast flash memory is starting to challenge the nominal 375MBps ceiling of the SATA 3Gbps bus (which is somewhat below 300MBps in practice).

The Crucial RealSSD C300 features a Marvell controller backed up with 256MB of cache. A useful accessory included is a SATA-to-USB 2.0 cable, a handy asset for any enthusiast’s toolbox.

Our test PC rig included a SATA 6Gps controller, giving the essential room for the Crucial RealSSD C300 to breathe. And in our tests it did indeed take advantage of the fatter pipe, confidently giving the best sequential read and write speeds of the group.

In the traditional HDD benchmarks, we saw read speeds of 291MBps and write averages at 191MBps in HD Tach, while HD Tune Pro placed the Crucial RealSSD C300 at 278MBps and 183MBps respectively.

The AS SSD test let the Crucial RealSSD C300 flex its muscles further, hitting an average write speed of 197MBps and reading at a giddy 345MBps, while CrystalDiskMark upped the ante further by sequential writing at 213MBps and reading at no less than 354MBps. These figures were well tempered by startling AS SSD queued results of 214/159MBps for reads/writes, rising further to 221/184MBps in CDM’s QD32 test.

In flat-out 8MB file throughput in the ATTO test, the Crucial RealSSD C300 hit its maximum scores: 374MBps read and 217MBps write speeds.

NEXT: our expert verdict >>

Group test: what's the best portable hard drive?

Crucial RealSSD C300 Expert Verdict »

256MB onboard cache
Marvell 88SS9174-BJP2 controller
70g. Test results - HD Tach: read (short/long) = 290.9/291.3, write (short/long) = 174.7/191.0
HD Tune Pro: read = 277.5, write = 183.4
AS SSD: read (seq) = 345.83, write (seq) = 197.27, 4k (read/write) = 24.6/44.6, 4k (64 threads) = 213.7/159.1, access time (read/write) = 0.16/0.78, overall score = 638
CrystalDiskMark: read (seq) = 354.1, write (seq) = 212.6, 4k QD32 (read/write) = 221.4/183.5
ATTO Bench: read (8MB) = 373.7, write (8MB) = 216.9, read (0.5kB) = 18.2, write (0.5kB) = 17.5
  • Build Quality: We give this item 9 of 10 for build quality
  • Features: We give this item 8 of 10 for features
  • Value for Money: We give this item 8 of 10 for value for money
  • Overall: We give this item 9 of 10 overall

Even without a modern SATA 6Gbps bus-equipped PC, the Crucial RealSSD C300 would be our first choice for a performance SSD at this capacity. Not only does it take on the attention-grabbing sequential read-write tests with dashing aplomb, it also proved itself capable of supreme multi-tasking.

  • Plextor PX-256M2S review

    Plextor PX-256M2S

    The Plextor PX-256M2S is a high-performance SSD that exploits the latest 6Gbps SATA bus to score incredible sequential read/write speeds.

  • Crucial M4 review

    Crucial M4

    The Crucial M4 is set to usurp even last year's best SSD, the Crucial RealSSD C300. Read our lab results to see why - UPDATED 27 JULY 2011

  • Apricorn Velocity Solo X2 review

    Apricorn Velocity Solo X2

    Use the Velocity Solo X2 to add a SATA 6gbps interface and an SSD to your PC. Here's our Apricorn Velocity Solo X2 review.

  • Apple MacBook Pro 15in (Early 2011) review

    Apple MacBook Pro 15in (Early 2011)

    The Apple MacBook Pro 15in (Early 2011) makes many breakthroughs, none visible from the outside - yet one of those revisions alone may transform personal computing thanks to a welcome boost in connectivity speeds. We take a closer look at the MacBook Pro with the Thunderbolt connector.

  • Samsung 830 Series 256GB review

    Samsung 830 Series 256GB

    The Samsung 830 Series 256GB is a SATA 6Gbps SSD built with Samsung silicon throughout.

IDG UK Sites

Best camera phone of 2015: iPhone 6 Plus vs LG G4 vs Galaxy S6 vs One M9 vs Nexus 6

IDG UK Sites

In defence of BlackBerrys

IDG UK Sites

Why we should reserve judgement on Apple ditching Helvetica in OS X/iOS for the Apple Watch's San...

IDG UK Sites

Retina 3.3GHz iMac 27in preview: Apple cuts £400 of price of Retina iMac with new model