771 Xeon

Updated September 20, 2026

Overview

Product sourcing insights & recommendations

23 来源

The phrase "771 Xeon" refers to a popular hardware "mod" where server-grade Intel Xeon processors (LGA 771) are modified to run on consumer-grade LGA 775 motherboards. While natively incompatible, this modification allows users to achieve Core 2 Quad-level performance at a fraction of the cost, making it a cornerstone of the retro PC building and budget workstation markets Overclock Reddit.

Market Trends & Pricing (2026)

The market for Xeon processors in 2026 is experiencing a "structural shift" due to rising new CPU prices (+27% YoY) and the growth of AI infrastructure Harddiskdirect.

* Retro Demand: The "771 to 775" mod remains a niche but active interest for hobbyists. Modified processors like the Xeon X5460 are available for approximately $15.70, often bundled with the necessary adapter stickers Alibaba.

* Enterprise Shift: In the broader B2B market, demand has shifted toward refurbished Xeon E5-2600 v4 series (LGA 2011-3) for affordable virtualization and AI inference, with prices for high-end legacy models like the E5-2680 v4 remaining stable around $38 due to high stock availability Alibaba Alibaba.

* Silicon Constraints: New server CPU supply only meets ~40% of global demand, further driving the value of certified refurbished Xeon units across all generations Alibaba.

Key Technical Insights

To successfully utilize a "771 Xeon" on a consumer board, three critical steps are required Facebook Harddiskdirect:

1Pin Swap: An adhesive adapter sticker is applied to the CPU base to swap two signal pins.
2Socket Modification: The plastic guide tabs in the LGA 775 socket must be physically removed to allow the 771 CPU to sit flat.
3BIOS Microcode: The motherboard's BIOS must be flashed with injected microcodes to ensure the CPU is correctly recognized and runs at full speed with all instruction sets (e.g., SSE4.1) enabled.

The most compatible chipsets for this mod include P35, P45, G31, and G41, while X38 and Q45 boards are generally avoided due to hardware limitations Harddiskdirect.

Based on the retro hardware interest, you can explore:

Sources & References

23 sources cited · Verified industry data & reports

Xeon LGA 771 on LGA 775 mobos : r/buildapc

Reddit · r/buildapc

The 771 Xeons are why you want to convert to 775. They are much more powerful, actually developed on a smaller transistor, I know it was hard ...

[MOD] LGA775 Support For LGA771 Xeon CPUs

Overclock.net

This mod is for LGA775 motherboards only! It allows the use of LGA771 Xeon CPU's that are very affordable and powerful in many LGA775 ...

LGA 771

Wikipedia

LGA 771, also known as Socket J, is a CPU interface introduced by Intel in 2006. ceased production in 2011, Release date May 16, 2006; 20 years ago (2006-05-16)

[SOLVED] - From LGA 775 to LGA 771 Xeon mod

Tom's Hardware

I just bought a CPU Xeon x5450 Lga 771 with the mode already done so i can just put the CPU inside the Lga 775 motherboard. When i turn on the PC the fans ...

Who has done the LGA 771 Xeon to LGA 775 mod?

AnandTech Forums: Technology, Hardware, Software, and Deals

Recently, I converted a Dell Optiplex 360 slim desktop to a Xeon E5440 (2.83 Ghz with 12 MB cache) using the LGA 771 to LGA 775 adapter ...

Ultimate LGA 771/775 build?

VOGONS

Ultimate LGA 771/775 build? · 1. Q9650 or XEON · 2. MSI P45D3 platinum · 3. 16gb of DDR3 · 4. Radeon 4870/4890 *2 in crossfire. · 5. SSD Intel X25 ...

771 Xeon

Overview

Market Trends & Pricing (2026)

Key Technical Insights

Lga 771 To 775 Modified Xeon E5450 E5440 X5460

Related Searches

Sources & References