In October 1995 NEC rolled out a line of UNIX servers, including the UP4800/770, which was one of the industry's fastest eight-CPU UNIX computers in existence at the time. The servers used R10000 64-bit RISC-based chips. NEC and MIPS Technologies (U.S.) jointly developed the R10000, which outperformed the previous R4400 (250 MHz) chip by about 3.3 times. The UP4800/770, configurable with up to eight R10000 RISC chips clocked at 200 MHz, processed as many as 4,400 transactions per minute. The UP4800/760, which could take up to four R10000s, processed as many as 3,100 transactions per minute. The UP4800/660R rack-mount server model could internally house all the system hardware, including the CPU, disk units, display, and keyboard. The 660R took about 40 percent less installation space than existing machines that used redundant construction to improve reliability.
| Model name | UP4800/ 770 | UP4800/ 760 | UP4800/ 660R | UP4800/675AD |
|---|---|---|---|---|
| Processors | R10000 Up to 8 |
R10000 Up to 4 |
R4400MC Up to 4 |
R4400MC Up to 4 |
| Main memory | 64MB -2GB |
64MB -1GB |
64MB -1GB |
64MB -2GB |
| Primary cache | Instruction: 32 KB, Data: 32 KB | Instruction: 32 KB, Data: 32 KB | Instruction: 16 KB, Data: 16 KB | Instruction: 16 KB, Data: 16 KB |
| Secondary cache | 1MB | 1MB | 4MB | 4MB |
| Magnetic disk | 4.2GB-3.4TB | 2.0GB-2.4TB | 2.0GB-2.4TB | 2.1GB-3.4TB |
