The Xserve Xeon 2.66 "Quad Core" (Late 2006) technically is a "build-to-order" configuration of the Xserve Xeon 2.0 "Quad Core" (Late 2006) , but also is documented as a separate model for reader convenience. Other than processor, these two models are identical .
The Xserve Xeon 2.66 "Quad Core" is powered by two 2.66 GHz Dual Core Intel Xeon 5150 processors with 4 MB of shared level 2 cache per processor and 1.33 GHz 64-bit dual independent frontside buses.
By default, it was configured with 1.0 GB of 667 MHz DDR2 ECC "fully-buffered" (FB-DIMM) memory (but can support up to 32 GB of RAM), an 80 GB (7200 RPM) SATA "drive module", a slot-loading 24x DVD-ROM/CD-RW "Combo" drive, and a "built-in ATI Radeon X1300 PCI Express graphics with 64 MB of GDDR3 SDRAM." Ports include onboard mini-DVI, two USB 2.0 ports, two Firewire "800" ports, and a front-mounted Firewire "400" port.