Crucial M225 256GB review

A huge SSD that’s blazingly fast in every category

Darien Graham-Smith
12 Apr 2010
Price when reviewed 

It’s not cheap, but the 256GB Crucial M225 is capacious enough to be the only drive in your system. That’s ideal if you’re looking to upgrade a laptop, and for desktop systems the single-drive option could help keep internal spaghetti to a minimum.

And though the up-front cost is high, at £1.76 per gigabyte the M225 is actually better value than most SSDs on the market. Sure, platter-based drives go for a tenth as much, but for what it is, the Crucial is comparatively cheap.

Crucial M225 256GB

The real attraction, though, is performance. In our tests the M225 achieved a phenomenal 219MB/sec sequential read speed – rather more than twice the 101MB/sec achieved by a mechanical Samsung SpinPoint drive – and kept up 68MB/sec in our small-file read test while the Samsung averaged 59MB/sec.

Write performance was impressive too. Historically this is an area where SSDs have stumbled; but the M225’s 158MB/sec sequential write speed put the 94MB/sec Samsung to shame. Even when taxed with multi-threaded 4K writes the drive kept up an average rate of 13MB/sec — while its mechanical rival plummeted to just 1.1MB/sec.

In short, the M225 proved significantly faster than a mechanical drive in all of our tests; and, as you'd hope, automatic housekeeping via the TRIM command is supported, so if you use this drive with Windows 7 it should maintain its performance. That means you can expect it to provide a consistent speed boost no matter how you use your PC.

Not everyone’s wallet will stretch to a drive this size, but if you have the cash to spend, the M225’s value, plus an excellent five-year warranty, make it an unbeatable choice.

Price when reviewed 
494(£494 inc VAT)


Capacity 256GB
Hard disk usable capacity 238GB
Hard disk type SSD
Cache size 64MB
Spindle speed N/A
Seek time (ms) N/A
Cost per gigabyte 176.5p

Performance tests

Write speed small files 131.0MB/sec
Write speed large files 158.0MB/sec
HD Tach burst speed 220.0MB/sec

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