Part Number	Frequency	Features	BIOS	PCB	Notes
Intel Celeron
RK80531RC037128 BX80531P190G128	1.9 GHz	128K, 400, Socket 478	030710s	V5.1
Intel Pentium 4
RK80531PC017G0K BX80531NK140G	1.4 GHz	256K, 400, Socket 478, Willamette	030710s	V5.1
RK80531PC021G0K BX80531NK150G	1.5 GHz	256K, 400, Socket 478, Willamette	030710s	V5.1
RK80531PC025G0K BX80531NK160G	1.6 GHz	256K, 400, Socket 478, Willamette	030710s	V5.1
RK80532PC025512 BX80532PC1600D	1.6A GHz	512K, 400, Socket 478, Northwood	030710s	V5.1
RK80531PC029G0K BX80531NK170G	1.7 GHz	256K, 400, Socket 478, Willamette	030710s	V5.1
RK80531PC033G0K BX80531NK180G	1.8 GHz	256K, 400, Socket 478, Willamette	030710s	V5.1
RK80532PC033512 BX80532PC1800D	1.8A GHz	512K, 400, Socket 478, Northwood	030710s	V5.1
RK80531PC037G0K BX80531NK190G	1.9 GHz	256K, 400, Socket 478, Willamette	030710s	V5.1
RK80531PC041G0K BX80531NK200G	2.0 GHz	256K, 400, Socket 478, Willamette	030710s	V5.1
RK80532PC041512 BX80532PC2000D	2.0A GHz	512K, 400, Socket 478, Northwood	030710s	V5.1
RK80532PC049512 BX80532PC2200D	2.2 GHz	512K, 400, Socket 478, Northwood	030710s	V5.1
RK80532PE051512 BX80532PE2266D	2.26 GHz	512K, 533, Socket 478, Northwood	030710s	V5.1
RK80532PC056512 BX80532PC2400D	2.4 GHz	512K, 400, Socket 478, Northwood	030710s	V5.1
RK80532PE056512 BX80532PE2400D	2.4 GHz	512K, 533, Socket 478, Northwood	030710s	V5.1
RK80532PC060512 BX80532PC2500D	2.5 GHz	512K, 400, Socket 478, Northwood	030710s	V5.1
RK80532PE061512 BX80532PE2533D	2.53 GHz	512K, 533, Socket 478, Northwood	030710s	V5.1
RK80532PC064512 BX80532PC2600D	2.6 GHz	512K, 400, Socket 478, Northwood	030710s	V5.1
RK80532PE067512 BX80532PE2667D	2.66 GHz	512K, 533, Socket 478, Northwood	030710s	V5.1
RK80532PE072512 BX80532PE2800D	2.8 GHz	512K, 533, Socket 478, Northwood	030710s	V5.1

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.