'Old' Athlon

'Thunderbird' Athlon

Manufacturing process

0.25 / 0.18 micron,
Aluminum Interconnect

0.18 micron,
Aluminum / Copper Interconnect

Die Size

102 mm² (.18 micron)

117 mm²

Number of Transistors / Die

22 million

37 million

Voltage

1.6 - 1.8 V

1.7 V

Thermal Power at 1 GHz

65 W

54 W

Maximum Current at 1 GHz

37 A

33.6 A

L2-CacheLocation

External

On-Die

L2-Cache Clock

33 / 40 / 50 % of core Clock

100% of Core Clock

L2-Cache Size

512 kB

256 kB

L2-Cache Data Path

64-bit wide

64-bit wide

L2-Cache Organization

2-way set associative

16-way set associative

Package

SlotA Cartridge

SocketA 'CPGA'
SlotA Cartridge (OEM only)