Toshiba satellite A20 series Maintenance Manual page 22

1 Hardware Overview
The system unit is composed of the following major components:
Processor
Intel Desktop Pentium 4 Processor 2.53GHz
– Processor core speed: 2.53GHz at 1.525V
– Processor bus speed: 533MHz
– Integrated L1 cache memory: 12KB instruction cache and 8KB write-back
data cache, 4-way set associative
– Integrated L2 cache memory: 512KB ECC protected cache data array, 8-
way set associative
– Integrated NDP
Intel Desktop Pentium 4 Processor 2.66GHz
– Processor core speed: 2.66GHz at 1.525V
– Processor bus speed: 533MHz
– Integrated L1 cache memory: 12KB instruction cache and 8KB write-back
data cache, 4-way set associative
– Integrated L2 cache memory: 512KB ECC protected cache data array, 8-
way set associative
– Integrated NDP
Intel Desktop Pentium 4 Processor 2.8GHz
– Processor core speed: 2.8GHz at 1.525V
– Processor bus speed: 533MHz
– Integrated L1 cache memory: 12KB instruction cache and 8KB write-back
data cache, 4-way set associative
– Integrated L2 cache memory: 512KB ECC protected cache data array, 8-
way set associative
– Integrated NDP
Intel Desktop Pentium 4 Processor 3.06GHz
– Processor core speed: 3.06GHz at 1.525V
– Processor bus speed: 533MHz
– Integrated L1 cache memory: 12KB instruction cache and 8KB write-back
data cache, 4-way set associative
– Integrated L2 cache memory: 512KB ECC protected cache data array, 8-
way set associative
– Integrated NDP
1-8
1.2 System Unit Block Diagram
Satellite A20 Maintenance Manual (960-444)