VIA Cyrix III 700 MHz

VIA Cyrix III, later renamed to C3, is a family of x86-compatible microprocessors. The first generation of Cyrix III CPUs was based on a Joshua core developed by Cyrix. This core was quickly replaced by Samuel core designed by Centaur Technology. The Samuel core was manufactured using 0.18 micro technology. The core included large 64 KB level 1 code and data caches, no level 2 cache, and had much simpler design than the Joshua core. Next core – Samuel 2 – added exclusive level 2 cache to VIA Cyrix III processors. Based on 0.15 micron technology, that core had more than 40% smaller die size, and lower core voltage and power consumption than the Samuel core. With the release of Samuel2 core the VIA Cyrix III was renamed to VIA C3. The Samuel2 core was followed by Ezra core. Manufactured on 0.13 micron technology, the Ezra core had even lower power consumption than the Samuel2 processors. A variation of Ezra core, called Ezra-T, was compatible with Tualatin bus. The last VIA C3 core was Nehemiah. This core featured full-speed integrated FPU unit, support for SSE instructions, AES encryption and random number generator. Support for 3DNow! instructions was removed from the Nehemiah processors.




General information
Type CPU / Microprocessor
Market segment Desktop
Family VIA C3 Samuel

CPU part number
  • C3-700MHz is an OEM/tray microprocessor
Frequency  ?  700 MHz
Bus speed  ?  100 MHz
Clock multiplier  ?  7
Package 370-pin ceramic PGA
1.95″ x 1.95″ (4.95 cm x 4.95 cm)
Socket Socket 370 / PGA370

Architecture / Microarchitecture
Instruction set x86
Processor core  ?  Samuel

Manufacturing process 0.18 micron CMOS technology
Die 75mm2
Data width 32 bit
Floating Point Unit Integrated
Level 1 cache size  ?  64 KB 4-way set associative instruction cache
64 KB 4-way set associative data cache
Pipeline 12 stages
Extensions & Technologies
  • MMX instructions
  • 3DNow! technology
Low power features
  • Auto-HALT power down state
  • Stop grant state  ? 
  • Sleep state  ? 
  • Deep sleep state  ? 
Electrical / Thermal parameters
V core  ?  1.9V
Minimum/Maximum operating temperature  ?  0°C – 70°C
Typical/Maximum power dissipation

9.2 Watt / 15.3 Watt (1.9 Volt)
10.2 Watt / 16.9 Watt (2 Volt)