Intel Pentium III identification
Pentium III (CPU markings) | Mobile Pentium III and Celeron processors | 80486 | Pentium | Pentium II | Modern Intel CPUs | Other Intel chips
To identify Pentium III OEM part numbers please see the page Identification of modern Intel microprocessors.
Pentium III (CPU markings) identification
| 1 | 2 | 3 | | 4 | | 5 | | 6 | | 7 | |
| 600 | E | B | / | 256 | / | 100 | / | 2.0V | | S1 | |
| |
| 7. Package type |
| Blank | FC-PGA or FC-PGA2 |
| S1 | Slot 1 cartridge |
| |
| | 6. Operating voltage (V) |
| |
| | | | | 5. Bus frequency |
| 100 | 100 MHz |
| 133 | 133 MHz |
| |
| | | | | | | 4. Size of L2 cache (KB) |
| 256 | 256 KB |
| 512 | 512 KB |
| |
| | | | | | | | | 3. Bus frequency identifier |
| This letter is used to distinguish between processors running at the same frequency but having different bus speeds. |
| Blank | Processor may have 100 or 133 MHz bus speed. See "Bus Frequency" parameter for exact value. |
| B | 133 MHz bus speed. |
| |
| | | | | | | | | | 2. Cache implementation |
| Blank | Standard Pentium III Level 2 cache |
| E | Advanced transfer cache |
| |
| | 1. Frequency (MHz) |
Mobile Pentium III and Celeron processors identification
| | 1 | 2 | 3 | 4 | 5 | |
| PM | M | 500 | 02 | 101 | AB | |
| |
| 5. Processor revision |
| ES | Engineering sample |
| QS | Qualification sample |
| Other letters | Processor revision (starts from AA) |
| |
| | 4. Design revision (starts from 001) |
| |
| | | 3. Cache size |
| 01 | 128 KB |
| 02 | 256 KB |
| |
| | | | 2. Frequency |
| 450 | 450 MHz |
| 500 | 500 MHz |
| 550 | 550 MHz |
| 600 | 600 MHz |
| 650 | 650 MHz |
| 700 | 700 MHz |
| 750 | 750 MHz |
| 800 | 800 MHZ |
| 850 | 850 MHz |
| |
| | | | | 1. Module type |
| L | Pentium III processor mobile module (MMC-2) |
| M | Pentium III processor mobile module (MMC-2) with SpeedStep technology |
| N | Celeron (0.18 micron ) mobile module (MMC-2) |