| General information | |
| Type | |
| Family | |
| Part number | BX80526C866256S |
| Processor markings | 866/256/133/1.75V |
| Frequency (MHz) | 866 |
| Bus speed (MHz) | 133 |
| Clock multiplier | 6.5 |
| Package type | 370-pin FC-PGA1 |
| Socket type | |
| Architecture / Microarchitecture / Other | |
| CPUID | 068Ah |
| Core stepping | cD0 |
| Processor core | Coppermine |
| Manufacturing technology (micron) | 0.18 |
| Number of cores | 1 |
| L2 cache size (KB) | 256 |
| Features | MMX SSE |
| Core voltage (V) | 1.75 |
| Case temperature (°C) | 80 |
| Processor substrate revision | C |
| Notes on sSpec SL4ZJ | |
| |