Box fresh SSDs are all very well, but they don't stay that way for long. Before testing, we give every SSD a going over by first installing a full copy of Windows 7 and then filling it to the brim with data. With early SSDs, this often exposed long-term performance problems. Happily, the latest SSDs take this sort of abuse in their stride.

Size

Formatted capacity – GB, bigger is better
OCZ IBIS HSDL 240GB: 223GB
Samsung SSD 470 Series 256GB: 238GB
Kingston SSDNow V+100 256GB: 238GB

Synthetic drive performance

ATTO Sequential read – MB/s, bigger is better
OCZ IBIS HSDL 240GB: 834MB/s
Samsung SSD 470 Series 256GB: 267MB/s
Kingston SSDNow V+100 256GB: 207MB/s

Synthetic drive performance

ATTO Sequential write – MB/s, bigger is better
OCZ IBIS HSDL 240GB: 700MB/s
Samsung SSD 470 Series 256GB: 261MB/s
Kingston SSDNow V+100 256GB: 189MB/s

Synthetic drive performance

HDTach Burst rate – MB/s, bigger is better
OCZ IBIS HSDL 240GB: 184MB/s
Samsung SSD 470 Series 256GB: 216MB/s
Kingston SSDNow V+100 256GB: 193MB/s

Synthetic drive performance

AS SSD 4k random reads – MB/s, bigger is better
OCZ IBIS HSDL 240GB: 24.75MB/s
Samsung SSD 470 Series 256GB: 11.89MB/s
Kingston SSDNow V+100 256GB: 12.76MB/s

Synthetic drive performance

AS SSD 4k random writes – MB/s, bigger is better
OCZ IBIS HSDL 240GB: 53.05MB/s
Samsung SSD 470 Series 256GB: 34.14MB/s
Kingston SSDNow V+100 256GB: 34.82MB/s

Synthetic drive performance

AS SSD 4k 64-thread random reads – MBs/second, bigger is better
OCZ IBIS HSDL 240GB: 417.94MB/s
Samsung SSD 470 Series 256GB: 117.56MB/s
Kingston SSDNow V+100 256GB – 16.30MB/s

Synthetic drive performance

AS SSD 4k 64-thread random writes – MB/s, bigger is better
OCZ IBIS HSDL 240GB: 289.38MB/s
Samsung SSD 470 Series 256GB: 42.35MB/s
Kingston SSDNow V+100 256GB: 35.39MB/s

Application performance

File decompression – Time taken, lower is better
OCZ IBIS HSDL 240GB: 29 seconds
Samsung SSD 470 Series 256GB: 32 seconds
Kingston SSDNow V+100 256GB: 32 seconds

File transfer performance

Copy 4.5GB file – Time taken, lower is better
OCZ IBIS HSDL 240GB: 25 seconds
Samsung SSD 470 Series 256GB: 43 seconds
Kingston SSDNow V+100 256GB: 62 seconds