Intel SR440BX motherboard specifications

CPU socket type:	Slot 1
* Motherboard SR440BX supports a single Pentium® III processor, Pentium® II processor, or Intel® Celeron® processor.

Intel SR440BX CPU compatibility list

Part Number	Frequency	Features	BIOS	PCB	Notes
Intel Celeron
Celeron 266 BX80523R266000	266 MHz	66 MHz FSB, 0 KB	P01 or greater
Celeron 300 BX80523R300000	300 MHz	66 MHz FSB, 0 KB	P01 or greater
BX80524R300128 Celeron 300A	300A MHz	66 MHz FSB, 128 KB	P01 or greater
BX80524R333128 Celeron 333	333 MHz	66 MHz FSB, 128 KB	P01 or greater
BX80524R366128 Celeron 366	366 MHz	66 MHz FSB, 128 KB	P01 or greater
BX80524R400128 Celeron 400	400 MHz	66 MHz FSB, 128 KB	P01 or greater
Celeron 433	433 MHz	66 MHz FSB, 128 KB	P01 or greater
Intel Pentium II
80522PX233512 80522PX233512EC B80522P233512 DC80522PX233512 DC80522PX2335EC	233 MHz	66 MHz FSB, 512 KB	P01 or greater
80522PX266512 80522PX266512EC 80523PX266512 80523PX266512PE B80522P266512 B80522P266512E B80523P266512E DC80522PX2665EC	266 MHz	66 MHz FSB, 512 KB	P01 or greater
80522PX300512 80522PX300512EC 80523PX300512PE B80522P300512E B80523P300512E	300 MHz	66 MHz FSB, 512 KB	P01 or greater
80523PX333512 80523PX333512PE B80523P333512E	333 MHz	66 MHz FSB, 512 KB	P01 or greater
80523PY350512 80523PY350512PE 80523PY350512PE B80523P350512E BX80523U350512E	350 MHz	100 MHz FSB, 512 KB	P01 or greater
80523PY400512 80523PY400512PE 80523PY400512PE B80523P400512E BX80523U400512E	400 MHz	100 MHz FSB, 512 KB	P01 or greater
80523PY450512 80523PY450512PE 80523PY450512PE B80523P450512E BX80523U450512E	450 MHz	100 MHz FSB, 512 KB	P01 or greater
Intel Pentium III
80525PY450512 BX80525U450512 BX80525U450512E	450 MHz	100 MHz FSB, 512 KB	P02 or greater
80525PY500512 BX80525U500512 BX80525U500512E	500 MHz	100 MHz FSB, 512 KB	P02 or greater
80525PY550512 BX80525U550512	550 MHz	100 MHz FSB, 512 KB	P04 or greater
80525PY600512 BX80525U600512	600 MHz	100 MHz FSB, 512 KB	P06 or greater

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.