AMD EPYC 7443 socket: SP3
The AMD EPYC 7443 uses SP3, the LGA socket for EPYC server processors with DDR4 ECC memory. The 24-core chip at 200 W needs a single or dual socket server board.
AMD EPYC 7443 specifications
| Cores | 24 |
|---|---|
| Threads | 48 |
| Core architecture | Zen 3 (Milan) |
| Clocks | 2.85 GHz base, up to 4.0 GHz turbo |
| Cache | 128 MB L3 and 12 MB L2 |
| Default TDP | 200 W |
| Manufacturing process | TSMC 7 nm FinFET |
| Memory support | DDR4-3200 ECC, 8 channels, up to 4 TB per socket |
| PCI Express | 128 PCIe Gen4 lanes per socket, up to 160 in 2P |
| Integrated graphics | None (BMC graphics on board) |
| Multiplier | Locked |
| ECC memory | Supported, DDR4 ECC RDIMM |
| Package | SP3 LGA4094 |
| Cooler in the box | None, server heatsink required |
Motherboard compatibility
AMD EPYC 7443 needs a motherboard with a SP3 socket. Chipset by chipset data for this codename is not recorded yet. See the SP3 chipset list and the board maker's CPU support list.
SP3 at a glance
| Type | LGA, 4,094 contacts |
|---|---|
| Package size | 58.5 × 75.4 mm |
| Introduced | June 2017 |
| Memory | DDR4 ECC RDIMM, 8 channels to DDR4-3200, up to 4 TB per socket |
| Cooler mounting holes | Board specific (server heatsink) |
What the EPYC 7443 is
The AMD EPYC 7443 is a 24-core, 48-thread member of the Milan family from March 2021. Milan cores run 2.85 GHz base with up to 4 GHz boost, backed by 128 MB of L3 plus 12 MB of L2. The 200 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 24-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 4 GHz for single-thread peaks. A nearby option on the same socket is AMD EPYC 7453, which steps cores and TDP inside the same platform.
Socket and motherboard compatibility
The EPYC 7443 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 CPU cooler compatibility by socket 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 200 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 24-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 7443 needs a board that lists it by name with the right firmware. The How to find your CPU socket type 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 7453 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 How to find your CPU socket type guide explains when a platform change pays off.
Frequently asked questions
What socket does the AMD EPYC 7443 use?
It uses SP3 on single or dual socket server boards.
How many cores does the AMD EPYC 7443 have?
24 cores with 48 threads at 2.85 GHz base and up to 4 GHz boost, with 128 MB of L3.
What memory does the AMD EPYC 7443 support?
DDR4-3200 ECC across 8 channels to 4 TB per socket.
Does the AMD EPYC 7443 have integrated graphics?
No. Boards provide BMC graphics for management.
What is the TDP of the AMD EPYC 7443?
200 W with server cooling required.
How many PCIe lanes does the AMD EPYC 7443 offer?
128 Gen4 lanes per socket for NVMe, NICs and accelerators, rising to 160 lanes across two sockets.
Does the AMD EPYC 7443 work in two-socket boards?
Yes. Two-socket boards share the 160-lane budget across both processors for scale-out nodes.
What cooling does the AMD EPYC 7443 need?
Vendor-qualified heatsinks with front-to-back airflow sized for the 200 W band. No boxed cooler exists.
Which boards fit this processor?
Single or dual socket SP3 server boards that list the exact SKU with matching firmware.
Sources and verification
Facts last checked against these sources on . Page last edited on .