Celeron vs Pentium - difference between desktop Celeron and Pentium processors

Celeron processor is a good and cheaper alternative to Pentium II, Pentium III and Pentium 4 microprocessors when the top performance is not required, and microprocessor and desktop price is important. The Celeron processors are based on the same core as more expensive Pentium-branded processors, but usually lack in some features such as L2 cache size and bus speed. Since the Celeron processor family spans three generations of x86 microprocessors, the differences between Celeron and Pentium processors vary depending on the generation. Please see the tables below for exact differences for each processor generation. In addition to the differences described below, at any given point of time the fastest Celerons were usually clocked lower than fastest Pentium-branded processors. For example, Celeron 600 MHz was introduced in March of 2000 - 5 months after introduction of Pentium III 600 MHz, and one week after introduction of Pentium III 866 MHz.

In many cases Celeron processors could be used in the same motherboards as Pentium-branded processors. Notes in the table below indicate when Celeron processors require different motherboards.

Difference between Celeron and Pentium II

FeatureCeleronPentium II
PackageSEPP
370-pin PPGA
SECC
SECC2
Socket/slot typeSlot 1
Socket 370
Slot 1
Bus speed (MHz)6666
100
L2 cache size (KB)0 KB
128 KB on-die cache running at CPU frequency
512 KB backside cache running at 1/2 CPU frequency
MultiprocessingOfficially not supportedSupported
NotesSocket 370 Celeron processors require socket 370 motherboard, but can be used in Slot 1 motherboards with the help of slotket (slocket) adapters.

Difference between Celeron Coppermine and Pentium III Katmai/Coppermine

FeatureCeleron (Coppermine)Pentium III (Katmai) / (Coppermine)
Bus speed (MHz)66
100
100
133
L2 cache size (KB)128 KB on-die cache running at CPU frequency256 KB on-die cache running at CPU frequency
512 KB backside cache running at 1/2 CPU frequency
MultiprocessingNot supportedSupported
NotesCeleron processors can be used in Slot 1 motherboards with the help of slotket (slocket) adapters.

Difference between Celeron Tualatin and Pentium III Tualatin

FeatureCeleron (Tualatin)Pentium III (Tualatin)
Bus speed (MHz)100133
L2 cache size (KB)256256 KB
512 KB
MultiprocessingNot supportedSupported by some processors

Difference between Celeron Willamette and Pentium 4 Willamette

FeatureCeleron (Willamette)Pentium 4 (Willamette)
L2 cache size (KB)128256

Difference between Celeron Northwood and Pentium 4 Northwood

FeatureCeleron (Northwood)Pentium 4 (Northwood)
Bus speed (MHz)400400
533
800
L2 cache size (KB)128512
HyperthreadingNot supportedSupported by some processors

Difference between Celeron D Prescott and Pentium 4 Prescott

FeatureCeleron D PrescottPentium 4 Prescott
Bus speed (MHz)533533
800
L2 cache size (KB)2561024
2056
HyperthreadingNot supportedSupported by almost all processors
Enhanced SpeedStep TechnologyNot supportedSupported by some processors
Virtualization technologyNot supportedSupported by some processors

Difference between Celeron D Cedar Mill and Pentium 4 Cedar Mill

FeatureCeleron D Cedar MillPentium 4 Cedar Mill
Bus speed (MHz)533800
L2 cache size (KB)5122048
HyperthreadingNot supportedSupported
Enhanced SpeedStep TechnologyNot supportedSupported
Comments

Multiprocessing

2006-07-10 16:47:57
Posted by: Root

Celeron Covington/Mendocino is only Celeron, which CAN work in dual mode... however Intel says that this is impossible.
Also Celeron Tualatin has 256KB cache, not 128KB... So there is only two differences between them and "full" Pentium Tualatin:
1) cache latency (celeron's cache is slower by 1 clock cycle)
2) FSB (100 vs 133)
Note: there is two pentium III tualatin types:
PIII or PIII-D ("Pentium III desktop")
133Mhz FSB, 256KB cache, cannot work in dual :(
PIII-S ("Pentium III server")
133Mhz FSB, 512KB cache, dual-capable

Response: Thank you for comments, I will correct the table.
UPDATE: Partially corrected the page

Some Information to fix

2006-07-10 22:27:52
Posted by: Diego Reinoso

Note: there is two pentium III tualatin types:
PIII or PIII-D ("Pentium III desktop")
133Mhz FSB, 256KB cache, cannot work in dual :(
PIII-S ("Pentium III server")
133Mhz FSB, 512KB cache, dual-capable

If we talk about tualatin there were three types available (including mobile versions) but as we are talking about desktop version there are only two. Why did you wrote "PIII or PIII-D Pentium III desktop"? Intel never called ANY PIII "PIII-D" they just called the desktop version Pentium III and the server version Pentium III-S. There was the desktop version which was only called Pentium III which had 256kb cache. And the Pentium III-S which had 512kb. The main difference between the Celeron tualatin the Pentium III Tualatin and Pentium III Server Tualatin was that the Pentium III Server Tualatin was the only processor capable of running in dual-processing.

about PIII-D

2006-07-11 03:01:35
Posted by: Root

> "PIII or PIII-D Pentium III desktop"?
Yes, P!!!-D isn't official name for this family of CPU...
> The main difference between the Celeron tualatin
> the Pentium III Tualatin and Pentium III Server
> Tualatin
and in cache size... So P!!!-S is some type analogue of Xeon. But one can use this CPU in desktop MoBo, in opposite to [P!!!] Xeon (which can be installed only in Slot2 MoBos)

 

2007-01-21 10:20:05
Posted by: matt2971

You are correct in saying that the server version of the Pentium III Tualatin was distinguished by the "S" (usually "PIII-S" although the "S" can crop-up elsewhere in the description), and that there was never a "D" designation.

However, the desktop PIII Tualatin running at 1.133ghz (rather than the other 1.2ghz model) did have an "A" designation (usually seen "PIII 1133A"). This was to to distinguish it from the PIII 1133 on the Coppermine core.

Confusing, isn't it. Link:

http://www.cpuscorecard.com/cpuprices/ip3.htm

It should also be noted that the desktop PIII Tualatins also differed from the server PIII Tualatins in that the server models would not run properly in the standard socket 370 Tualatin motherboards.

although they would work, because the server CPUs required different load line characteristics, they would degrade fast.

Link - look at the text starting just above the first chart:

http://www.digit-life.com/articles/tualatinsmp/index.html

Last modified: 17 Oct 2013
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