# List of Intel Xeon processors (P6-based)
## Pentium II Xeon
### "Drake" (250 nm)

* Based on P6 microarchitecture
* All models support: MMX
* All models support quad-processor configurations
* Steppings: B0, B1
| Model number | Frequency | L2 cache | FSB | Mult. | Voltage | TDP | Socket | Release date | Release price (USD) |
| Pentium II Xeon 400 | 400 MHz | 512 KB | 100 MT/s | 4× | 2.0 V | 30.8 W | Slot 2 | June 29, 1998 | $1,124 |
| Pentium II Xeon 400 | 400 MHz | 1 MB | 100 MT/s | 4× | 2.0 V | 38.1 W | Slot 2 | June 29, 1998 | $2,836 |
| Pentium II Xeon 450 | 450 MHz | 512 KB | 100 MT/s | 4.5× | 2.0 V | 34.5 W | Slot 2 | October 6, 1998 | $824 |
| Pentium II Xeon 450 | 450 MHz | 1 MB | 100 MT/s | 4.5× | 2.0 V | 42.8 W | Slot 2 | January 5, 1999 | $1,980 |
| Pentium II Xeon 450 | 450 MHz | 2 MB | 100 MT/s | 4.5× | 2.0 V | 46.7 W | Slot 2 | January 5, 1999 | $3,692 |

## Pentium III Xeon
### "Tanner" (250 nm)

* Based on P6 microarchitecture
* All models support: MMX, SSE
* All models support quad-processor configurations
* Die size: 123 mm$^2$
* Steppings: B0, C0
| Model number | Frequency | L2 cache | FSB | Mult. | Voltage | TDP | Socket | Release date | Release price (USD) |
| Pentium III Xeon 500 | 500 MHz | 512 KB | 100 MT/s | 5× | 2.0 V | 36 W | Slot 2 | March 17, 1999 | $931 |
| Pentium III Xeon 500 | 500 MHz | 1 MB | 100 MT/s | 5× | 2.0 V | 44 W | Slot 2 | March 17, 1999 | $1,980 |
| Pentium III Xeon 500 | 500 MHz | 2 MB | 100 MT/s | 5× | 2.0 V | 36.2 W | Slot 2 | March 17, 1999 | $3,692 |
| Pentium III Xeon 550 | 550 MHz | 512 KB | 100 MT/s | 5.5× | 2.0 V | 34 W | Slot 2 | August 23, 1999 | $931 |
| Pentium III Xeon 550 | 550 MHz | 1 MB | 100 MT/s | 5.5× | 2.0 V | 34 W | Slot 2 | August 23, 1999 | $1,980 |
| Pentium III Xeon 550 | 550 MHz | 2 MB | 100 MT/s | 5.5× | 2.0 V | 34 W | Slot 2 | August 23, 1999 | $3,692 |

### "Cascades" (180 nm)

* Based on P6 microarchitecture
* All models support: MMX, SSE
* Only 700 MHz and 900 MHz models are capable of quad processor configurations
* All models shipped in either 2.8 V, 5 V, or 12 V variants
* Steppings: A0, A1, A2, B0, C0
| Model number | Frequency | L2 cache | FSB | Mult. | Voltage | TDP | Socket | Release date | Release price (USD) |
| Pentium III Xeon 600 | 600 MHz | 256 KB | 133 MT/s | 4.5× | 2.8–12 V | 19.2 W | Slot 2 | October 1999 | $505 |
| Pentium III Xeon 667 | 667 MHz | 256 KB | 133 MT/s | 5× | 2.8–12 V | 21.3 W | Slot 2 | October 25, 1999 | $655 |
| Pentium III Xeon 700 | 700 MHz | 1 MB | 100 MT/s | 7× | 2.8–12 V | 29.6 W | Slot 2 | May 22, 2000 | $1,177 |
| Pentium III Xeon 700 | 700 MHz | 2 MB | 100 MT/s | 7× | 2.8–12 V | 29.6 W | Slot 2 | May 22, 2000 | $1,980 |
| Pentium III Xeon 733 | 733 MHz | 256 KB | 133 MT/s | 5.5× | 2.8–12 V | 23.3 W | Slot 2 | October 25, 1999 | $826 |
| Pentium III Xeon 800 | 800 MHz | 256 KB | 133 MT/s | 6× | 2.8–12 V | 25.4 W | Slot 2 | January 12, 2000 | $901 |
| Pentium III Xeon 866 | 867 MHz | 256 KB | 133 MT/s | 6.5× | 2.8–12 V | 29.6 W | Slot 2 | April 10, 2000 | $826 |
| Pentium III Xeon 900 | 900 MHz | 2 MB | 100 MT/s | 9× | 2.8–12 V | 39.3 W | Slot 2 | March 21, 2001 | $3,692 |
| Pentium III Xeon 933 | 933 MHz | 256 KB | 133 MT/s | 7× | 2.8–12 V | 29.6 W | Slot 2 | May 24, 2000 | $794 |
| Pentium III Xeon 1.00 | 1000 MHz | 256 KB | 133 MT/s | 7.5× | 2.8–12 V | 30.8 W | Slot 2 | August 22, 2000 | $719 |