Search for motherboard:
Search for CPU:

Intel Celeron 420 CPU

Jump to:

Intel Celeron 420 chipset compatibility

A list of compatible chipsets was compiled from CPU support lists, published on our website.

Intel Celeron 420 motherboard support

There are 1263 motherboards, compatible with this processor. Complete list of these motherboards is available on the Intel Celeron 420 motherboards page.

Intel Celeron 420 specifications

The specs of the Celeron microprocessor are published with the permission from Please see CPU-World website for complete specifications.

General specs

Core Name:Conroe-L
Manufacturing Process:0.065 micron
Socket Type:Socket 775
The Number of Cores:1
The Number of Threads:1
Multiprocessing:Not supported
Frequency:1.6 GHz
Bus speed:800 MHz
L1 Cache:32 KB (code)
32 KB (data)
L2 Cache:512KB
Thermal Design Power:35 Watt

Instructions and Technologies

Execute Disable Bit?Yes
64-bit Support?Yes
Hyper-Threading technology?No
Instruction Set Extensions:MMX
Supplemental SSE3

Tray Intel 420 microprocessors have HH80557RG025512 part number. Boxed CPUs have BX80557420 part number. Boxed processors for Chinese market have BXC80557420 part number. Please check Intel Celeron page for details on other CPUs from the family.

Celeron 420 S-Spec numbers

Production versions of this Celeron CPU had the following S-spec number:

S-Spec numberSteppingCPU ID

CPUs, similar to Intel Celeron 420

The Celeron 420 is based on Conroe-L core, and it uses Socket 775. There were also 4 Intel Conroe-L parts, that work in the same socket. Brief characteristics of these chips, along with stepping information is provided below:

Model / PartCoresThreadsFrequencyFSBL2
Celeron 420111.6 GHz800 MHz512KB35W+ N/A
Celeron 430111.8 GHz800 MHz512KB35W+ 95%
Celeron 440112 GHz800 MHz512KB   26%
Celeron 440112 GHz800 MHz512KB35W+ 88%
Celeron 450112.2 GHz800 MHz512KB35W+ 51%

"Upgrade Chance" is a probability of a successful processor upgrade/downgrade from the Celeron 420 (original CPU) to a specific model. This number is calculated as a percentage of all motherboards, compatible with both original and upgrade CPUs, compared to the number of motherboards, that support the original Intel Celeron 420. The number "100%" means that all motherboards, that work with the original model, also work with the upgrade CPU. The number "0%" means that none of the boards, that support the original CPU, will support the upgrade processor. The manufacturers do not always test or publish results for obscure and unreleased models, and in some cases for OEM only processors, as a result they tend to have much lower scores than more common desktop/mobile counterparts.

Intel Celeron 420 performance

The table below shows average multi-threaded performance of the microprocessor compared to other Socket 775 CPUs with the same type of architecture. The performance value for many processors was determined from more than 10 different real-world benchmarks and synthetic tests. For each benchmarked application, we calculated performance ratio between current processor and the Celeron 420, and then averaged the results. Overall performance of parts, marked with (1), was estimated using their specifications, and benchmarks of similar Intel Socket 775 CPUs with Conroe-L core.

Model / PartRelative performance Note
Celeron 450
Celeron 440
Celeron 440
Celeron 430
Celeron 420