It is meanly a dedicated upgrade for Photoshop performance and Mac OS X compatibility beyond Lion.
R. Scott "macfanboy", Amazon
30 October 2014
Summary: In this review, I'm mainly comparing my recently acquired used 2009 Mac Pro 4,1 with my 2006 Mac Pro 1,1, which it replaced. I'm running some Photoshop filters on a large 900+ MB Tiff file and it appears to be performing all tasks in memory and not with the scratch disk.
Summary: Item is as advertise. Would of gave 5 stars, just that a few keys on the keyboard it came with didn't work. The spacebar is really important. Was really looking forward to the new mac keyboard but oh well.
Summary: In the past was apprehensive about the Intel Mac's but very pleased with top of line first generation Mac Pro 1.1 with 3Ghz processors, upgraded video cars and 8 Gig Ram. Runs cooler and quieter than top of line G5 PPC machines. Also about 4 times faster.