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KPOM

macrumors P6
Oct 23, 2010
18,311
8,324
Yes, they degrade over time, but they are still faster than hard drives.

Anyway, Digilloyd did a test recently on the 512GB Toshiba SSD that Apple uses in the MacBook Pro. It ought to perform similarly to the Toshiba SSD in th new Air. The drive is slower than an OWC drive, but it does hold up reasonably well to severe usage.

http://macperformanceguide.com/SSD-RealWorld-BeforeAfter-AppleToshiba512.html

I just noticed that he also recently tested the MacBook Air's 256GB drive (actually 251GB, as reported by Disk Utility).

http://macperformanceguide.com/blog/2010/20101202_MacBookAir--ssd-speed.html

The bottom line: It's slightly slower than the "512GB" Toshiba SSD (actually closer to 500GB), but exhibits many of the same characteristics. He didn't perform a severe write test, though.
 
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