Part Number	Frequency	Features	BIOS	PCB	Notes
Intel Celeron
	233	66 MHz FSB	W6156VMS.250	2.1
	266	66 MHz FSB	W6156VMS.250	2.1
	300	66 MHz FSB	W6156VMS.250	2.1
	300A	66 MHz FSB	W6156VMS.250	2.1
	333	66 MHz FSB	W6156VMS.250	2.1
	366	66 MHz FSB	W6156VMS.250	2.1
	400	66 MHz FSB	W6156VMS.250	2.1
	433	66 MHz FSB	W6156VMS.250	2.1
Intel Pentium II
80522PX233512 80522PX233512EC B80522P233512	233	Klamath, 66 MHz FSB	W6156VMS.250	2.1
80523PX266512 80523PX266512PE B80523P266512E	266	Deschutes, 66 MHz FSB	W6156VMS.250	2.1
80522PX266512 B80522P266512 80522PX266512EC B80522P266512E	266	Klamath, 66 MHz FSB	W6156VMS.250	2.1
80523PX300512PE B80523P300512E	300	Deschutes, 66 MHz FSB	W6156VMS.250	2.1
80522PX300512 80522PX300512EC B80522P300512E	300	Klamath, 66 MHz FSB	W6156VMS.250	2.1
80523PX333512 80523PX333512PE B80523P333512E	333	Deschutes, 66 MHz FSB	W6156VMS.250	2.1
80523PY350512 80523PY350512PE B80523P350512E BX80523U350512E	350	Deschutes, 100 MHz FSB	W6156VMS.250	2.1
80523PY400512 80523PY400512PE B80523P400512E BX80523U400512E	400	Deschutes, 100 MHz FSB	W6156VMS.250	2.1
80523PY450512 80523PY450512PE B80523P450512E BX80523U450512E	450	Deschutes, 100 MHz FSB	W6156VMS.250	2.1
Intel Pentium III
80525PY450512 BX80525U450512	450	Katmai, 100 MHz FSB	W6156VMS.250	2.1
80525PY500512 BX80525U500512	500	Katmai, 100 MHz FSB	W6156VMS.250	2.1
80526PY500256	500E	Coppermine, 100 MHz FSB	W6156VMS.250	2.1
80525PZ533512 BX80525U533512	533B	Katmai, 133 MHz FSB	W6156VMS.250	2.1
80525PY550512 BX80525U550512	550	Katmai, 100 MHz FSB	W6156VMS.250	2.1
80526PY550256 BX80526U550256	550E	Coppermine, 100 MHz FSB	W6156VMS.250	2.1
80525PY600512 BX80525U600512	600	Katmai, 100 MHz FSB	W6156VMS.250	2.1
80525PZ600512 BX80525H600512	600B	Katmai, 133 MHz FSB	W6156VMS.250	2.1
80526PY600256 BX80526PY600256	600E	Coppermine, 100 MHz FSB	W6156VMS.250	2.1
80526PZ600256 BX80526U600256	600EB	Coppermine, 133 MHz FSB	W6156VMS.250	2.1
80526PY650256 BX80526U650256	650	Coppermine, 100 MHz FSB	W6156VMS.250	2.1
80526PZ667256 BX80526U667256	667	Coppermine, 133 MHz FSB	W6156VMS.250	2.1
80526PY700256 BX80526U700256	700	Coppermine, 100 MHz FSB	W6156VMS.250	2.1
80526PZ733256 BX80526U733256	733	Coppermine, 133 MHz FSB	W6156VMS.250	2.1
80526PY750256 BX80526U750256	750	Coppermine, 100 MHz FSB	W6156VMS.250	2.1
80526PZ800256 BX80526U800256	800EB	Coppermine, 133 MHz FSB	W6156VMS.250	2.1
80526PY850256 BX80526U850256	850	Coppermine, 100 MHz FSB	W6156VMS.250	2.1
80526PZ866256 BX80526U866256	866	Coppermine, 133 MHz FSB	W6156VMS.250	2.1
80526PZ933256 BX80526U933256	933	Coppermine, 133 MHz FSB	W6156VMS.250	2.1
80526PY1000256 BX80526H1000256	1 GHz	Coppermine, 100 MHz FSB	W6156VMS.250	2.1

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.