Socket 478 Supported Processors

Updated September 20, 2026

Overview

Product sourcing insights & recommendations

25 来源

In 2026, Socket 478 (mPGA478) has transitioned from a mainstream desktop interface to a high-value niche market focused on industrial resilience and retro-computing preservation. While Intel officially moved past this socket in 2004, it remains a "lifeblood" platform for multi-million dollar manufacturing lines that require ISA slot compatibility for legacy CNC and PLC controllers Alibaba Lenovo.

Supported Processors & Performance Ceiling

Socket 478 exclusively supports single-core architecture; any listings claiming "dual-core" for this socket are mislabeled or counterfeit Alibaba.

* Top-Tier Power: The Pentium 4 Extreme Edition (3.4GHz, Gallatin) is the most powerful supported model, prized by enthusiasts for its additional 2MB L3 cache Alibaba Alibaba.

* Highest Clock: Pentium 4 Prescott (up to 3.4GHz+) offers the highest raw speeds but suffers from excessive heat (TDP ~89W), making it less desirable for long-term industrial use Alibaba.

* Industrial Standard: The Pentium 4 Northwood (3.0GHz) is the "sweet spot" in 2026, offering optimal stability and thermal management for 24/7 industrial operations Alibaba.

Market Trends & Insights (2026)

1Industrial "Supply Chain Hardening": Facilities are aggressively sourcing New Old Stock (NOS) and refurbished motherboards to avoid production downtime Alibaba Linkedin. Search interest in Socket 478 hardware saw an unexpected peak in early 2026 as legacy infrastructure hit a critical maintenance window .
2Legacy Bridge Scarcity: While CPUs remain relatively affordable ($5–$30), industrial motherboards with working ISA slots are the true market bottleneck, with prices for specialized units like the Advantech AIMB-742 reaching $350–$600+ Alibaba Alibaba.
3Retro Gaming Authenticity: A mature collector's market has emerged, focusing on "period-accurate" Windows XP rigs where hardware timing is essential for 32-bit legacy software and gaming Alibaba.

Sourcing Snapshot

Current market availability includes specialized industrial boards and bulk legacy CPUs:

For industrial buyers, I have compiled a detailed list of available motherboards and high-frequency Pentium 4 units below. Check the deliverables for technical specs and supplier locations.

Based on these market trends, I can help you with:

Sources & References

25 sources cited · Verified industry data & reports

Socket 478 Explained: Intel Pentium 4 and Celeron ...

Lenovo

Socket 478 is compatible with Intel Pentium 4 and Celeron processors. socket 478 typically reaches up to 800 MHz. models from Lenovo, Gigabyte, MSI, and Intel® ...

Windows 11 Supported Intel Processors

Microsoft Learn

This specification details the Intel processors that can be used with Windows 11 customer systems. The processors listed represent the ...

Are there any Socket 478 CPUs that support "Intel 64 ...

Intel Community

None of the Intel processors based on socket 478 supports 64 bits. This feature was implemented on Intel processors based on socket 775.

Pentium 4 / EE 478 questions

VOGONS

The mobile 478 CPUs aren't electrically compatible (see Socket M for example). With a Socket 478, CPU choices are, unfortunately, very limited.

Socket 478

Wikipedia

Socket 478, also known as mPGA478 or mPGA478B, is a 478-contact CPU socket used for Intel's Pentium 4 and Celeron series CPUs.

ASRock > CPU Support List

ASRock

Support Models ; 478, Intel 865GV, P4i65GV ; 478, Intel 848P, P4i48 ; 478, Intel 845GV, 845GV-M ; 478, Intel 845GV, P4i45GV R5.0 ...