Intel Xeon Gold 6126 Server Processor (SR3B3) – 12-Core, 24-Thread, Up to 3.7GHz, LGA 3647, 19.25MB L3 (Refurbished)

The Intel Xeon Gold 6126 (SR3B3) is an LGA 3647 server processor with 12 cores, 24 threads and boost clocks up to 3.7GHz. Built on 1st Gen Xeon Scalable (Skylake-SP), with 19.25MB L3, it is aimed at IT teams, MSPs and homelab builders upgrading or populating servers.

Data-center core counts at a practical price.

Right-Sizing Server Compute Without Replacing the Platform

When a server runs out of CPU headroom, replacing the whole platform is rarely the cheapest option. Many teams can extend the life of existing hosts by upgrading to a higher-core processor that fits the same socket, or by adding a second matched CPU.

The Intel Xeon Gold 6126 delivers 12 cores and 24 threads on the LGA 3647 platform with 19.25MB L3 and DDR4-2666 ECC, 6-channel memory support. That makes it a practical choice for virtualization, databases, file and web services, and homelab clusters built on 1st Gen Xeon Scalable (Skylake-SP).

Cores, Clocks and Cache in Practice

With 12 cores, 24 threads, up to 3.7GHz and 19.25MB L3, the Intel Xeon Gold 6126 handles virtual machines, containers and database workloads with headroom. Power is rated at 125W TDP.

Platform and Connectivity

The LGA 3647 socket supports DDR4-2666 ECC, 6-channel and 48 PCIe 3.0 lanes. A discrete graphics card is required for display output.

Setup Instructions

How to Install the Intel Xeon Gold 6126

1. Confirm your server motherboard supports the Xeon Gold 6126 on the LGA 3647 socket and update BIOS/firmware first.
2. Power down, discharge static and remove the existing heatsink and processor carefully.
3. Align the CPU with the socket key, install it, apply fresh thermal paste and refit the heatsink to the specified torque.
4. Boot to BIOS, confirm cores and memory are detected, then load your hypervisor or OS and verify performance.