The rx2600 is a zx1 based 2U server from HP.
It has up to two McKinley, Madison or Deerfield processors.
It has 12 DIMM slots which must be loaded with matched quads. Supported DIMM sizes are 256MB to 2GB.
It has 4 PCI-X slots, each on their own bus. Slot 1 has 1GB/s of bandwidth and slots 2, 3 and 4 have 500MB/s of bandwidth each.
On the motherboard, there are four EHCI USB ports, a CMD649 IDE controller, two serial ports, an Intel 100Mbit network port, a Broadcom 5701 gigabit ethernet port and an LSI 53c1030 Ultra320 scsi controller. There is an optional ECI card which has a Radeon video port and a Diva serial / remote management chip.
It has three internal drive bays; the bottom two are connected to one port of the 1030 controller and the top one is connected to the other. The external scsi port is on the same bus as the upper internal drive bay. The built-in DVD drive is connected to the IDE controller.