Obscure Model Numbering, Continued
The third diagram again shows the percentage difference between the model numbering and the actual core clock. The Athlon XP 3200+ has the greatest gap - 31 percent.
Customers will see the CPU through different eyes. They'll assume that the "3200+" has some bearing on the chip's actual performance. As such, you shouldn't be surprised if one of your friends picks up a box with the label "3200" at the store and brags to you that he, or she, has the fastest computer.
Wafer with Barton CPUs: if everything works out right, AMD can produce 163 Barton Athlons from a single wafer, according to THG's internal calculations and data provided by experts.
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| CPU core | Barton | Thoroughbred "B" | Thoroughbred "A" | Palomino | Thunderbird |
|---|---|---|---|---|---|
| Wafer surface (200 mm diameter) | 31416 mm² | 31416 mm² | 31416 mm² | 31416 mm² | 31416 mm² |
| Die surface | 101 mm² | 84 mm² | 80 mm² | 128 mm² | 128 mm² |
| Process technology | 0.13 µm | 0.13 µm | 0.13 µm | 0.18 µm | 0.18 µm |
| Waste (approx) | 18% | 18% | 18% | 18% | 18% |
| Yield (theoretical) | 255 units/wafer | 306 units/wafer | 322 units/wafer | 201 units/wafer | 201 units/wafer |
| Yield (at 60% yield rate) | 153 units/wafer | 183 units/wafer | 193 units/wafer | 120 units/wafer | 120 units/wafer |
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