Apple's pre-configured 21.5- and 27-inch iMacs both ship with 1TB hard drives, but if you're willing to wait a day or two for a custom model to ship, two new flash storage options are now on offer. Any iMac configuration can now be had with either a 256GB or 512GB flash upgrade, priced over the base drive at $300 and $600, respectively. A 768GB flash option remains available with the 27-inch model only, for an additional $900. Education and corporate discounts still apply, but even with a modest price drop, be prepared to fork over quite a bit of cash for the turbo-charged drives, available through Apple's online store at the source link below.

http://www.engadget.com/2013/05/02/a...flash-storage/