Intel D850MD motherboard specifications

CPU socket type:	Socket 478
* Motherboard D850MD supports a single Pentium® 4 processor with a system bus frequency of 400 MHz. 1. The following board revisions (AA numbers) support these processors: A71258-400 or later A71266-400 or later A56430-400 or later A52481-400 or later. See the board revision note, below, for an explanation. 2. All board revisions support these processors

Intel D850MD CPU compatibility list

Part Number	Frequency	Features	BIOS	PCB	Notes
Intel Pentium 4
BX80531NK140G RK80531PC017G0K	1.4 GHz	400 MHz FSB, 256 KB	P02 or greater		Note 2
BX80531NK150G RK80531PC021G0K	1.5 GHz	400 MHz FSB, 256 KB	P02 or greater		Note 2
BX80531NK160G RK80531PC025G0K	1.6 GHz	400 MHz FSB, 256 KB	P02 or greater		Note 2
BX80532PC1600D RK80532PC025512	1.60A GHz	400 MHz FSB, 512 KB	P07 or greater		Note 1
BX80531NK170G RK80531PC029G0K	1.7 GHz	400 MHz FSB, 256 KB	P07 or greater		Note 2
RK80532PC029512	1.70A GHz	400 MHz FSB, 512 KB	P07 or greater		Note 1
BX80531NK180G RK80531PC033G0K	1.8 GHz	400 MHz FSB, 256 KB	P07 or greater		Note 2
BX80532PC1800D RK80532PC033512	1.80A GHz	400 MHz FSB, 512 KB	P07 or greater		Note 1
BX80531NK190G RK80531PC037G0K	1.9 GHz	400 MHz FSB, 256 KB	P07 or greater		Note 2
BX80531NK200G RK80531PC041G0K	2.0 GHz	400 MHz FSB, 256 KB	P07 or greater		Note 2
BX80532PC2000D RK80532PC041512	2.0A GHz	400 MHz FSB, 512 KB	P07 or greater		Note 1
BX80532PC2200D RK80532PC049512	2.2 GHz	400 MHz FSB, 512 KB	P07 or greater		Note 1
BX80532PC2400D RK80532PC056512	2.4 GHz	400 MHz FSB, 512 KB	P07 or greater		Note 1
BX80532PC2500D RK80532PC060512	2.5 GHz	400 MHz FSB, 512 KB	P15 or greater		Note 1
BX80532PC2600D RK80532PC064512	2.6 GHz	400 MHz FSB, 512 KB	P15 or greater		Note 1

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.