Celeron

Pentium II Deschutes

Covington

0.25

0

MMX

Slot-1

SEPP

66MHz

266MHz

300MHz

Celeron A

Pentium II Deschutes

Mendocino

0.25

128

MMX

Slot-1

SEPP

66MHz

300MHz

433MHz

Celeron A-PGA

Pentium II Deschutes

Mendocino

0.25

128

MMX

Socket 370

PPGA

66MHz

300AMHz

533MHz

Celeron III

Pentium III Coppermine

Coppermine-128

0.18

128

SSE

Socket 370

FC-PGA

66/100MHz ^[1]

533AMHz

1.1GHz

Celeron IIIA

Pentium III Tualatin

Tualatin-256

0.13

256

SSE

Socket 370

FC-PGA2

100MHz

900MHz

1.4GHz

Celeron 4

Pentium 4 Willamette

Willamette-128

0.18

128

SSE2

Socket 478

FC-PGA2

400MHz

1.7GHz

1.8GHz

Celeron 4A

Pentium 4 Northwood

Northwood-128

0.13

128

SSE2

Socket 478

FC-PGA2

400MHz

2.0GHz

2.8GHz

Celeron D

Pentium 4 Prescott

Prescott-256

0.09

256

SSE3

Socket 478/Socket T (LGA775) ^[2]

FC-PGA2

533MHz

2.13GHz

3.33GHz

SEPP = Single edge processor package.

FC-PGA = Flip chip pin grid array.

FC-PGA2 = FC-PGA with added heat spreader.

MMX = Multimedia extensions; 57 additional instructions for graphics and sound processing.

SSE = Streaming SIMD (single instruction multiple data) extensions; MMX plus 70 additional instructions for graphics and sound processing.

SSE2 = Streaming SIMD extensions 2; SSE plus 144 additional instructions for graphics and sound processing.

The "Celeron Version" names listed here are not official; I made them up as a way to clearly identify the different Celeron processors.

Minimum and maximum speeds indicate the slowest and fastest rated speeds of each variation offered.