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The major new feature of the third K7 core, Thunderbird, was integrated
on die L2 cache. Although the size of the L2 cache was cut in half as compared to
the previous Athlon core, the smaller size of the L2 cache was compensated by
much faster cache speed.
Identification of processors with the Thunderbird core:
- By part number: Card module (slot A) processors have part
numbers starting from "AMD-A" and ending with character "A".
An example: AMD-A0850MPR24B A
- By part number: Ceramic PGA (socket A/462) processors have part numbers
starting from "A" and followed by digits.
An example: A1300AMS3B
- By CPU ID: First two digits of the CPU identification number for Thunderbird microprocessors
are "64".
| Athlon Thunderbird core features |
|---|
| New features | Backside 512 KB L2 cache was replaced with integrated 256 KB L2 cache
Increased L2 cache speed
Increased bus speed to 266 MHz (133 MHz DDR)
Ceramic PGA package |
| Other names | T-bird
Model 4 |
| Previous core generation | Orion |
| Next core generation | Palomino |
| Microprocessor families | Athlon Slot A | Athlon Socket A/462 |
| Manufacturing technology | 0.18 micron |
| Frequency | 650 - 1000 MHz | 600 MHz - 1400 MHz |
| Fastest processor | AMD-A1000MMR24B A - 1000 MHz, 200 MHz FSB | A1400AMS3B - 1400 MHz, 200 MHz FSB
A1400AMS3C - 1400 MHz, 266 MHz FSB |
| Front-side bus | 200 MHz (100 MHz DDR) | 200 MHz (100 MHz DDR)
266 MHz (133 MHz DDR) |
| L2 cache | on-die 256 KB running at the processor speed |
| Package | Card Module | Ceramic PGA |
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