AMD EPYC 7343 socket: SP3

What the EPYC 7343 is

Released in March 2021, the AMD EPYC 7343 targets servers with 16 cores and 32 threads. Milan cores run 3.2 GHz base with up to 3.9 GHz boost, backed by 128 MB of L3 plus 8 MB of L2. The 190 W rating sets server cooling and power delivery.

Memory support covers DDR4-3200 ECC, 8 channels, up to 4 TB per socket. Eight channels feed virtual machines and databases, and ECC corrects single-bit errors during continuous duty. A total of 128 Gen4 lanes per socket serve NVMe, NICs and accelerators, rising to 160 lanes in two-socket boards.

Servers take this 16-core Milan part where per-socket licensing or power limits decide the build. The 128 MB of L3 keeps virtual machines fed while clocks reach 3.9 GHz for single-thread peaks. A nearby option on the same socket is AMD EPYC 7313, which steps cores and TDP inside the same platform.

Socket and motherboard compatibility

The EPYC 7343 fits SP3 on single or dual socket server boards with LGA retention and server power delivery. Board lists must name the exact SKU for qualification.

Memory population, lane splits and cooling follow the server board design. Two-socket boards share the 160-lane budget across both processors. The Socket vs chipset: what decides whether a CPU works guide shows how platform choice maps to generations.

Memory, PCIe and cooling

DDR4-3200 ECC, 8 channels, up to 4 TB per socket. Matched RDIMMs hold the rated speed across all populated channels.

Gen4 lanes from the socket wire NVMe, NICs and accelerators, 128 per socket and 160 across two. Lane budgets decide how many devices run at full speed.

Cooling belongs to the server maker across the 190 W band with front-to-back airflow. No boxed cooler exists. Paste service follows the maker manual.

Where this Milan part fits

The Milan stack spans 8 to 64 cores, and this 16-core SKU sits where core licensing, power caps or per-core fees shape the order. Fewer, faster cores beat more, slower cores for licensed databases, while dense virtualisation takes higher counts. The 128 MB L3 keeps working sets close on both shapes.

Two-socket boards double memory channels and lanes for scale-out nodes, while single-socket boards cut cost and idle draw for edge racks. Either way the EPYC 7343 needs a board that lists it by name with the right firmware. The LGA, PGA and BGA: CPU package types explained guide explains platform sizing.

Single-socket boards cut idle draw for edge racks while dual-socket boards serve dense virtualisation. Populate all eight memory channels for full bandwidth on either shape, since empty channels cost throughput on memory-bound work.

Upgrade paths

On SP3 the moves run along core count within the same board class, up to flagships such as AMD EPYC 7313 where validated. Core growth needs no board change when the maker lists the part.

Beyond the series the replacement is a whole appliance on newer platforms. The LGA, PGA and BGA: CPU package types explained guide explains when a platform change pays off.