AMD EPYC 4124P socket: AM5

What the EPYC 4124P is

The EPYC 4124P is a 4-core, 8-thread server processor that AMD released on May 21, 2024 with the EPYC 4004 series for entry servers. Zen 4 Raphael cores run at 3.8 GHz base with boost to 5.1 GHz. Cache is 16 MB of L3 with 4 MB of L2. Default TDP is 65 W.

A note on cache: one database prints 32 MB of L3 for this SKU, but the AMD product page, press materials and datasheet agree on 16 MB, which this page follows. Four cores with high boost suit firewalls, storage controllers and management hosts that need server validation rather than threads. The boxed ordering part is 100-100001570WOF with tray 100-000001570.

ECC memory through UDIMM and RDIMM separates this line from desktop Ryzen on the same socket. The AMD page makes no multiplier claim, so this page records none. Launch pricing was set at 149 USD per 1Ku tray quantities, the lowest entry point of the 4004 family.

Workload fit is minimal infrastructure: network appliances, backup targets and lab hosts where 4 ECC-backed cores cover the duty inside 65 W. Operators pick the 4124P where the alternative was desktop silicon without correction, since ECC pays for itself the first time it catches a fault.

A second role is the cold spare: homelab builders and branch offices that need ECC and BMC management without paying for idle cores. Operators often deploy the 4124P as a standby that can temporarily carry any light role, since 4 fast cores cover most appliance duty in a pinch.

Socket and motherboard compatibility

The 4124P fits the AM5 socket in LGA-1718 packaging on single-socket server boards. EPYC 4004 SKUs run on 1P server designs only, with firmware carrying the SKU ID. The board maker CPU support list confirms the minimum BIOS for each model.

Server boards differ from desktop AM5 models in ECC routing, BMC management and duty-rated firmware, even though the socket matches. Production hosting belongs on purpose-built EPYC 4004 boards rather than repurposed desktop designs without those features. Small integrators often qualify a single EPYC 4004 board for their whole appliance range to keep support simple.

The 6-core AMD EPYC 4244P above shares the platform for heavier duty at matching power with room to grow. Sockets, memory and PCIe generations match across both for common spares in entry fleets.

Memory, PCIe and cooling

DDR5-5200 ECC in 2 channels to 192 GB is the rated fit through UDIMM and RDIMM. Matched pairs keep bandwidth uniform across 4 cores, and ECC coverage matters most on hosts that run months between reboots without supervision. Capacity follows the appliance role: firewalls need little, while backup targets size for cache tables and log retention across months.

PCIe 5.0 x28 lanes from the CPU serve boot NVMe, networking and an optional card on entry boards. Few small boards wire every lane, yet HBAs and NICs never wait on this CPU for appliance throughput at any load level. Board manuals define the fitted slots per chassis.

Cooling at 65 W uses compact server heatsinks matched to chassis airflow. Tray and WOF editions ship without a cooler. The AM5 fixed-backplate pattern from the CPU cooler compatibility by socket guide applies to replacements.

Upgrade paths

Inside AM5 the 4124P is the starting rung: the 6-core AMD EPYC 4244P above doubles threads at matching power for growing infrastructure, while the 8-core AMD EPYC 4344P adds cores for heavier hosting. Boards and memory carry over with a BIOS check for straightforward field upgrades.

Moving to the Zen 5 based EPYC 4005 series brings newer cores on the same socket for refresh cycles. Leaving AM5 entirely means new boards with fresh memory for larger SP5-class platforms.