Part Number	Frequency	Features	BIOS	PCB	Notes
Intel Celeron
RK80531RC029128 BX80531P170G128	1.70 GHz	100 MHz FSB	AB52S007
RK80531RC033128 BX80531P180G128 RK80532RC033128 BX80532RC1800B	1.80 GHz	100 MHz FSB	AB52S007
RK80531RC041128 BX80531P200G128 RK80532RC041128 BX80532RC2000B	2.00 GHz	100 MHz FSB	AB52S007
RK80532RC045128 BX80532RC2100B	2.10 GHz	100 MHz FSB	AB52S007
RK80532RC049128 BX80532RC2200B	2.20 GHz	100 MHz FSB	AB52S007
RK80532RC052128 BX80532RC2300B	2.30 GHz	100 MHz FSB	AB52S007
RK80532RC056128 BX80532RC2400B	2.40 GHz	100 MHz FSB	AB52S007
RK80532RC060128 BX80532RC2500B	2.50 GHz	100 MHz FSB	AB52S007
RK80532RC064128 BX80532RC2600B	2.60 GHz	100 MHz FSB	AB52S007
RK80532RC072128 BX80532RC2800B	2.80 GHz	100 MHz FSB	AB52S007
Intel Pentium 4
RK80531PC021G0K BX80531NK150G	1.50 GHz	100 MHz FSB	AB52S007
RK80531PC025G0K BX80531NK160G RK80532PC025512 BX80532PC1600D	1.60 GHz	100 MHz FSB	AB52S007
RK80531PC029G0K BX80531NK170G RK80532PC029512	1.70 GHz	100 MHz FSB	AB52S007
RK80531PC033G0K BX80531NK180G RK80532PC033512 BX80532PC1800D	1.80 GHz	100 MHz FSB	AB52S007
RK80531PC037G0K BX80531NK190G RK80532PC037512	1.90 GHz	100 MHz FSB	AB52S007
RK80531PC041G0K BX80531NK200G RK80532PC041512 BX80532PC2000D	2.00 GHz	100 MHz FSB	AB52S007
RK80532PC049512 BX80532PC2200D	2.20 GHz	100 MHz FSB	AB52S007
RK80532PE051512 BX80532PE2266D	2.26 GHz	133 MHz FSB	AB52S007
RK80532PC056512 BX80532PC2400D	2.40 GHz	100 MHz FSB	AB52S007
RK80532PE056512 BX80532PE2400D	2.40 GHz	133 MHz FSB	AB52S007
RK80532PC060512 BX80532PC2500D	2.50 GHz	100 MHz FSB	AB52S007
RK80532PE061512 BX80532PE2533D	2.53 GHz	133 MHz FSB	AB52S007
RK80532PE067512 BX80532PE2667D	2.66 GHz	133 MHz FSB	AB52S007
RK80532PE072512 BX80532PE2800D RK80546PE0721M BX80546PE2800E	2.80 GHz	133 MHz FSB	AB52S007

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.