Thoroughbred A & B
The Thoroughbred core was the successor to the Palomino. It was manufactured on the new .13 micron process. AMD continued to improve the Athlon with the Thoroughbred core. The new core brought a smaller die, less heat, and more performance. With a smaller die, AMD could make more processors from each wafer. Less heat is always good and it also allows the processor to be clocked higher. The Thoroughbred also performed better at the same clock speed then the Palomino core.
Thoroughbred B Athlon XP 2800+
Specifications:
| Release date | [A]June 10th, 2002; [B]August 21st, 2002 |
| Core name | Thoroughbred A, Thoroughbred B |
| Number of transistors | [A]~37.2 Million, [B]~37.6 Million |
| Manufacturing Process | .13� |
| Location of L2 cache | On-die |
| Amount of L2 cache | 256kb |
| Package | Socket A/462 |
| Official clock speeds | 1400-2200 MHz |
Barton
The Barton core was the long-awaited core from AMD for the Athlon XP. The key feature in the new core was the 512kb of L2 cache. The extra cache increased performance. The new core also produced less heat and AMD finally brought 400 MHz FSB support to the new generation. At the same speeds the Barton core outperformed the Thoroughbreds. The Barton core was also a gem for overclockers. This core easily went past its official speeds and could go very high too.
Barton Athlon XP 2800+
Specifications:
| Release date | Februrary 10th, 2003 |
| Core name | Barton |
| Number of transistors | ~54.3 Million |
| Manufacturing Process | .13� |
| Location of L2 cache | On-die |
| Amount of L2 cache | 512kb |
| Package | Socket A/462 |
| Official clock speeds | 1830-2200 MHz |
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