The folks at Bare Feet have put together a handy look at the performance of four of the five storage options available when custom ordering a new 27-inch iMac through Apple. These include a 1 TB and 3 TB hard disk (a 7200 RPM Seagate Barracuda), 768 GB solid state drive and 1 TB Fusion Drive. Their results with the latter are pretty impressive, but come with a noteworthy caveat.
In their testing, Bare Feet found that the SSD option obviously performs best, offering a throughput of 440 MB/s when writing large files and 477 MB/s when reading large files. Small random transfers hit 20
