| Part Number | Frequency | Features | BIOS | PCB | Notes |
|---|
| Intel Pentium II |
80522PX233512
80522PX233512EC
B80522P233512 | 233 MHz | | Any | Any | |
80522PX233512
80522PX233512EC
B80522P233512 | 233 MHz | Slot 1 | Any | Any | |
80522PX266512
B80522P266512
80522PX266512EC
B80522P266512E
80523PX266512
80523PX266512PE
B80523P266512E | 266 MHz | | Any | Any | |
80522PX266512
B80522P266512
80522PX266512EC
B80522P266512E
80523PX266512
80523PX266512PE
B80523P266512E | 266 MHz | Slot 1 | Any | Any | |
80522PX300512
80522PX300512EC
B80522P300512E
80523PX300512PE
B80523P300512E2 | 300 MHz | | Any | Any | |
80522PX300512
80522PX300512EC
B80522P300512E
80523PX300512PE
B80523P300512E2 | 300 MHz | Slot 1 | Any | Any | |
80523PX333512
80523PX333512PE
B80523P333512E | 333 MHz | | Any | Any | |
80523PX333512
80523PX333512PE
B80523P333512E | 333 MHz | Slot 1 | Any | Any | |
80523PY350512
80523PY350512PE
B80523P350512E
BX80523U350512E | 350 MHz | | Any | Any | |
80523PY400512
80523PY400512PE
B80523P400512E
BX80523U400512E | 400 MHz | | Any | Any | |
80523PY450512
80523PY450512PE
B80523P450512E
BX80523U450512E | 450 MHz | | Any | Any | |
| Intel Pentium III |
80525PY450512
BX80525U450512 | 450 MHz | | Any | Any | |
80525PY450512
BX80525U450512 | 450 MHz | Slot 1 | Any | Any | |
80525PY500512
BX80525U500512 | 500 MHz | | Any | Any | |
80525PY500512
BX80525U500512 | 500 MHz | Slot 1 | Any | Any | |
80525PY550512
BX80525U550512 | 550 MHz | | Any | Any | |
80525PY550512
BX80525U550512 | 550 MHz | Slot 1 | Any | Any | |
80525PY600512
BX80525U600512 | 600 MHz | | Any | Any | |
80525PY600512
BX80525U600512 | 600 MHz | Slot 1 | Any | Any | |
When part numbers are not supplied by motherboard manufacturers,
we use best guess approach to determine part numbers based on CPU model,
frequency and features. In some cases our guess may be incorrect or incomplete.
Please always verify part numbers before committing to buying the CPU.