These Apple Mac Pro “Quad Core” 2.66 MA356LL/A towers come to you professionally refurbished by a Microsoft Authorized Refurbisher so you can buy with confidence that each machine has been inspected, tested, and refurbished with care. These Mac Pro towers come with two dual core 2.66GHz Intel Xeon processors, offering the raw computing power and speed required by intensive applications such as music and video production. Systems also have 4GB of “fully-buffered” FB-DIMM memory, and two installed hard-drives: a 250GB SATA hard drive dedicated to the operating system, and a 500GB SATA hard drive dedicated to storage. Machines also include the 6X DL “SuperDrive”, capable of reading and writing both CDs and DVDs, and an ATI X1900XT Video Card with 512MB memory. Pre-installed with Apple OSX 10.5 “Leopard” :::::::::::: These computers are covered by a 1 year hardware warranty including U.S. based technical support. :::::::::::: Computers are cosmetically C grade, with noticeable scratching and wear on the computer case, but with no effect on functionality. :::::::::::: What’s in the box? Apple Mac Pro computer, Apple brand mouse and keyboard, and power cable.