Please use the configurator below to complete your configuration. Once you have finalized your configuration, click the ‘Build my Configuration’ button to generate a unique listing for your configuration. You will automatically be redirected to the new listing. This new listing will be active for 3 days.The 64-bit Intel Xeon 'Westmere' 6-core processors have six independent processor cores for the ultimate in power and performance. It supports Hyper-Threading which allows two threads to run simultaneously on each core -- so Mac OS recognizes twelve total cores on this model, six real and six virtual. It also supports "Turbo Boost" which automatically boosts the processor speed based on workload - so if an application is only using one of the six cores it will automatically increase the speed of the core in use and turn off the unused cores.The single-processor Mac Pro supports up to 48GB of DDR3 ECC memory in four slots. Choose more memory to improve overall system performance.All memory sets are new.Your Mac Pro includes four drive bays, allowing you to configure it with up to 24TB of storage using 7200-rpm SATA 3Gb/s drives, up to 8TB of storage using high-performance solid-state drives (SSD), or any combination of each type of drive. Configure each drive bay separately.Upgrading your boot drive from a hard drive to a solid-state drive will generate up to 3x faster boot time, 5x faster import/open/saving of large files, and 5x faster application start-up.All hard drives and solid-state drives are new.Configure the second drive bay with an additional hard drive or solid-state drive.Configure the third drive bay with an additional hard drive or solid-state drive.Configure the fourth drive bay with an additional hard drive or solid-state drive.Apple produced the Mac Pro with a SATA II (3GB/s) onboard drive bay controller. New SSDs are SATA III (6GB/s). Upgrading your SSD(s) from the onboard SATA II controller to a PCI-Express based SATA III controller will allow the SSD to perform at full speed; achieving up to double the speed.SATA II SSD's (Drive Bay) offer a max theoretical transfer rate of: read 285Mbps, write 275Mbps. SATA III SSD's (PCIe) offer a max theoretical transfer rate of: read 550Mbps, write 520Mbps.The new 'cylinder' Mac Pros use the newest technology flash storage drives. Via a proprietary and revolutionary system, we install the super fast flash storage drives in the tower Mac Pro. These drives achieve 1500MB/s as a single drive and up to 4000MB/s in striped-RAID configuration.Since these drives will be installed on a PCI-Express slot, the 4 drive bays will be free. Thus, allowing the SSD/flash boot drive plus 4x hard drives.Configure your Mac Pro with PCI Express graphics cards. The Mac pro supports 3x of lower power consumption graphics cards to support up to 6x displays. Internally, performance grahics cards are limited to one per unit due to power restrictions. To install two or four performance graphics cards, such as the GTX series, contact us regarding our external GPU cluster.Your Mac Pro comes standard with one 18x double-layer SuperDrive that burns and plays both CDs and DVDs.This bay is usually empty. Any of the following can be installed.Enhance your Mac Pro with USB 3.0 (5GB/s) and/or eSATA connections for external storage.The Mac Pro comes standard with five USB 2.0 ports, four Firewire 800 ports, and two Gigabit Ethernet ports.Configure your Mac Pro with an AirPort Extreme Wi-Fi card using 802.11n technology to connect to wireless networks.Choose the operating system that best fits your software requirements.Apple ultrathin aluminum keyboard.Apple mouse.Once you have completed your configuration, click the "Build My Configuration" button to generate an eBay listing with your unique configuration. This will allow you to purchase your custom Apple Mac Pro directly on eBay. Please wait a moment while you are redirected to a new listing for your unique configuration. $0.00 Once you have completed your configuration, click the "Build My Configuration" to generate an eBay listing with your unique configuration. This will allow you to purchase your custom Apple Mac Pro directly on eBay. Please wait a moment while you are redirected to a new listing for your unique configuration. © 2016 iBuildMacs, All Rights Reserved.