Athlon Thunderbird CPU Model 4 Manufacturing Process 180 nm Approximate Transistor Count 37 million Approximate Die Size 120 sq. mm Working frequency 1000 MHz Package Type CPGA Operating Voltage 1.75 V Max Die Temperature 90° C L1 Cache Size 128 KB L2 Cache Size 256 KB Multiplier 10x FSB Frequency 200 MHz Stepping Code AXIAR Manufacture Year 2001 Manufacture Week 09 Production Batch W