AMD OS4122WLU4DGN Quad-Core Server Processor

Overview

The AMD OS4122WLU4DGN is an Opteron 4122 quad-core server processor built for Socket C32 platforms — a straightforward upgrade or replacement part for two-socket and single-socket servers already standardized on the Opteron 4000-series platform. If you're maintaining an existing fleet of C32 servers rather than refreshing to newer silicon, this is the part number to match against your motherboard's supported CPU list. Running at 2.2 GHz across four cores with 6 MB of shared L3 cache, the OS4122WLU4DGN targets general-purpose server workloads — file serving, virtualization hosts running lighter guest loads, and departmental application servers — rather than compute-dense HPC or database tiers.

Key Features

• Quad-Core Design: Four physical cores let the server handle multiple concurrent processes or lightly-loaded VM instances without the scheduling contention you'd see on a dual-core part — useful for consolidating a handful of legacy application roles onto one host.
• 2.2 GHz Clock Speed: Provides consistent per-thread throughput for I/O-bound and general application workloads. Not a clock-speed flagship, but adequate for workloads that scale across cores rather than depending on single-thread bursts.
• 6 MB L3 Cache: A shared 6 MB L3 pool reduces main-memory round trips for working sets that fit within cache, which matters most on database and virtualization workloads where cache misses are the real bottleneck, not raw clock speed.
• Socket C32 Platform: Matches the Opteron 4100/4200-series server and workstation boards. Confirm your motherboard's supported-CPU list before ordering — Socket C32 is not interchangeable with the larger Socket G34 used on higher-core-count Opteron 6000-series parts.
• AMD Opteron Server Lineage: Built on AMD's server-specific Opteron line rather than desktop silicon, meaning validated support for ECC memory and multi-socket coherency on boards designed for it — relevant if this server runs anything you can't afford to lose to a single-bit memory error.

Integration & Compatibility

The OS4122WLU4DGN drops into any Socket C32 motherboard already provisioned for the Opteron 4100/4200 series — common in single- and dual-socket rack and tower servers from that generation. Because it shares the C32 socket and chipset requirements with siblings across the Opteron 4000 family, it's a reasonable option for standardizing spare or replacement CPUs across a mixed fleet of C32 servers rather than sourcing a different stepping for each unit. Before ordering, verify current BIOS/firmware revision on the target board — C32 boards that shipped early in the platform's life sometimes need a firmware update to recognize later Opteron 4100-series steppings.

When to choose a different model: if the workload is virtualization-heavy or you need more cores per socket, look at a higher-core-count Opteron in the same C32 or G34 family rather than adding more of these quad-core units. If you're simply replacing a failed CPU in an existing server, matching the exact OS4122WLU4DGN part number is the safer path — mixing steppings in a dual-socket board isn't guaranteed to be supported.

Frequently Asked Questions

Q: What socket does the OS4122WLU4DGN use?

A: Socket C32 — confirm your server or workstation motherboard officially supports the Opteron 4100/4200 series before ordering.

Q: How many cores and what clock speed does the OS4122WLU4DGN run at?

A: It's a quad-core processor running at 2.2 GHz with 6 MB of shared L3 cache.

Q: Is the OS4122WLU4DGN new or refurbished?

A: Units are sourced as factory-new, genuine AMD parts — no grey-market or parallel-import sourcing.

Q: Can I mix the OS4122WLU4DGN with a different Opteron stepping in a dual-socket board?

A: Match identical part numbers across sockets in a dual-CPU configuration to avoid compatibility issues — this listing covers the OS4122WLU4DGN specifically.

James Everett

The OS4122WLU4DGN is one I see requested most often as a like-for-like replacement rather than a fresh build — Socket C32 boards running the Opteron 4100 series are still out there in single- and dual-socket deployments, and this quad-core 2.2 GHz part is the exact stepping a lot of those boards were validated against.

Technical Highlights:

• Quad-Core / 2.2 GHz: Four cores at 2.2 GHz gives you enough parallelism for a handful of concurrent services without the power draw of the higher-core-count Opteron parts in the same generation.
• 6 MB L3 Cache: Shared 6 MB cache keeps frequently-accessed data closer to the cores — noticeable on database and virtualization workloads where cache misses cost more than raw clock speed.
• Socket C32: Fixed platform target — this part only fits Opteron 4100/4200-series boards, not the larger G34 socket used on 6000-series Opterons.

Deployment Considerations:

• Check your board's BIOS revision before install — early C32 boards sometimes need a firmware update to recognize later 4100-series steppings.
• In a dual-socket board, match both CPUs to the same part number (OS4122WLU4DGN on both sides) rather than pairing with a different Opteron 4000-series stepping.

This is the right call for keeping an existing Opteron 4100-series file server or departmental application host running rather than a full platform refresh — order it as a direct swap, not as the CPU for a new build.