Part Number	Frequency	Features	BIOS	PCB	Notes
Intel Celeron
RK80531RC033128 BX80531P180G128 RK80532RC033128 BX80532RC1800B	1.8 GHz	128K, 400, Socket 478	060221S	V5.0
RK80531RC037128 BX80531P190G128	1.9 GHz	128K, 400, Socket 478	060221S	V5.0
RK80531RC041128 BX80531P200G128 RK80532RC041128 BX80532RC2000B	2.0 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC045128 BX80532RC2100B	2.1 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC049128 BX80532RC2200B	2.2 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC052128 BX80532RC2300B	2.3 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC056128 BX80532RC2400B	2.4 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC060128 BX80532RC2500B	2.5 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC064128 BX80532RC2600B	2.6 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC068128 BX80532RC2700B	2.7 GHz	128K, 400, Socket 478	060221S	V5.0
RK80532RC072128 BX80532RC2800B	2.8 GHz	128K, 400, Socket 478	060221S	V5.0
Intel Celeron D
RK80546RE051256 NE80546RE051256 BX80546RE2267C	2.26 GHz	256K, 533, Socket 478	060221S	V5.0
RK80546RE056256 NE80546RE056256 BX80546RE2400C	2.4 GHz	256K, 533, Socket 478	060221S	V5.0
RK80546RE061256 NE80546RE061256 BX80546RE2533C	2.53 GHz	256K, 533, Socket 478	060221S	V5.0
RK80546RE067256 NE80546RE067256 BX80546RE2667C	2.66 GHz	256K, 533, Socket 478	060221S	V5.0
RK80546RE072256 NE80546RE072256 BX80546RE2800C	2.8 GHz	256K, 533, Socket 478	060221S	V5.0
RK80546RE077256 NE80546RE077256 BX80546RE2933C	2.93 GHz	256K, 533, Socket 478	060221S	V5.0
RK80546RE083256 NE80546RE083256 BX80546RE3066C	3.06 GHz	256K, 533, Socket 478	060221S	V5.0
Intel Pentium 4
RK80532PC025512 BX80532PC1600D	1.6A GHz	512K, 400, Socket 478, Northwood	060221S	V5.0
RK80532PC033512 BX80532PC1800D	1.8A GHz	512K, 400, Socket 478, Northwood	060221S	V5.0
RK80532PC041512 BX80532PC2000D	2.0A GHz	512K, 400, Socket 478, Northwood	060221S	V5.0
RK80532PC049512 BX80532PC2200D	2.2 GHz	512K, 400, Socket 478, Northwood	060221S	V5.0
RK80532PE051512 BX80532PE2266D	2.26 GHz	512K, 533, Socket 478, Northwood	060221S	V5.0
	2.4 GHz	1M, 533, Socket 478	060221S	V5.0
B80546PE0561M BX80546PE2400E	2.4 GHz	1M, 533, Socket 478, Prescott	060221S	V5.0
RK80532PC056512 BX80532PC2400D	2.4 GHz	512K, 400, Socket 478, Northwood	060221S	V5.0
RK80532PE056512 BX80532PE2400D	2.4 GHz	512K, 533, Socket 478, Northwood	060221S	V5.0
RK80532PC060512 BX80532PC2500D	2.5 GHz	512K, 400, Socket 478, Northwood	060221S	V5.0
RK80532PE061512 BX80532PE2533D	2.53 GHz	512K, 533, Socket 478, Northwood	060221S	V5.0
RK80532PC064512 BX80532PC2600D	2.6 GHz	512K, 400, Socket 478, Northwood	060221S	V5.0
RK80532PE067512 BX80532PE2667D	2.66 GHz	512K, 533, Socket 478, Northwood	060221S	V5.0
	2.8 GHz	1M, 533, Socket 478	060221S	V5.0
RK80546PE0721M BX80546PE2800E	2.8 GHz	1M, 533, Socket 478, Prescott	060221S	V5.0
RK80532PE072512 BX80532PE2800D	2.8 GHz	512K, 533, Socket 478, Northwood	060221S	V5.0
RK80532PE083512 BX80532PE3066D	3.06 GHz	512K, 533, Socket 478, HT, Northwood	060221S	V5.0

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.