What you really want from a RAID 0 array is double the performance, especially considering the not inconsiderable outlay you'd be spending on twin SSDs.

In synthetic terms, things look good – both the read and write speeds get the expected boost. It's the real-world tests that don't bear out doubling your purchase. The application performance in both decompression and application installation times don't really tally with the synthetic scores. However, this is probably down to the old SATA II interface than the drives themselves.

Size
Formatted capacity: Gigabytes, bigger is better
Corsair Force F40 40GB: 37GB
Intel X25-V 40GB: 37GB
G.Skill Phoenix Pro 40GB: 37GB
G.Skill Phoenix Pro 40GB RAID 0: 74GB

Synthetic drive performance
ATTO Sequential read: MB/s, bigger is better
Corsair Force F40 40GB: 285MB/s
Intel X25-V 40GB: 196MB/s
G.Skill Phoenix Pro 40GB: 284MB/s
G.Skill Phoenix Pro 40GB RAID 0: 572MB/s

Synthetic drive performance
ATTO Sequential write: MB/s bigger is better
Corsair Force F40 40GB: 265MB/s
Intel X25-V 40GB: 46MB/s
G.Skill Phoenix Pro 40GB: 271MB/s
G.Skill Phoenix Pro 40GB RAID 0: 534MB/s

Synthetic drive performance
HDTach Burst rate: MB/s, bigger is better
Corsair Force F40 40GB: 261MB/s
Intel X25-V 40GB: 246MB/s
G.Skill Phoenix Pro 40GB: 247MB/s
G.Skill Phoenix Pro 40GB RAID 0: 2,280MB/s

Synthetic drive performance
AS SSD 4K random writes: MB/s, bigger is better
Corsair Force F40 40GB: 45MB/s
Intel X25-V 40GB: 28MB/s
G.Skill Phoenix Pro 40GB: 54MB/s
G.Skill Phoenix Pro 40GB RAID 0: 55MB/s

Application performance
File decompression: Time taken, lower is better
Corsair Force F40: 38s
Intel X25-V 40GB: 50s
G.Skill Phoenix Pro 40GB: 35s
G.Skill Phoenix Pro 40GB RAID 0: 30s