Introduced in April of 2001 as the replacement for the Enterprise 4500 server, the Sun Fire 4800 server is a twelve-processor machine that used UltraSPARC III CPUs (750MHz), UltraSPARC III Cu (copper based) CPUs (900MHz, 1050MHz or 1200MHz), UltraSPARC IV CPUs (1050MHz, 1200MHz, or 1350MHz), and UltraSPARC IV+ (1.5GHz or 1.8GHz) CPUs.
Maximum memory for the Sun Fire 4800 is 192 GB using 1GB DIMMs.
The Sun Fire 4800 did not have internal disk drives, but instead was combined with the D240 media tray, which held 2 ea. 18.2, 36.4, 73.4, or 146.8 GB SCSI disk drives.
The Sun Fire 4800 is 17.5 RU (rack units) tall, and came in both deskside and rack-mountable versions.
The Sun Fire X4800 was EOL’d (end-of-lifed) in June 2005.

Sun | Sun Fire 4800 Server
Number of processors: | Two to twelve |
Architecture: | Superscalar SPARC V9, UltraSPARC III |
E-Cache per processor: | 8 MB |
System interconnect: | Sun Fireplane interconnect 9.6 GB/sec. sustained |
Main memory: | Up to 96 GB of memory capacity per system |
I/O: | Sixteen PCI slots (four 66-MHz and twelve 33-MHz) or eight hot-swappable cPCI slots (four 66-MHz and four 33-MHz) |
System Controller: | Up to two per system |
Redundancy kit (optional): | Redundant power supply, fan, system controller |
Media device (optional): | Sun StorEdge D240 Media Tray, a four-device tray that supports hard disk, tape, or DVD-ROM. Can be used as a boot, data-storage, data-load and data-interchange, or data-backup device. |