AMD EPYC 7401P socket: SP3
The AMD EPYC 7401P uses the SP3 socket on server boards. It is a 24 core Naples chip for single socket racks with dense threads at 1P pricing.
AMD EPYC 7401P specifications
| Cores | 24 |
|---|---|
| Threads | 48 |
| Core architecture | Zen (Naples) |
| Clocks | 2.0 GHz base, up to 3.0 GHz boost |
| Cache | 64 MB L3 and 12 MB L2 (76 MB total) |
| Processor base power (TDP) | 170 W (155 W with DDR4-2400) |
| Manufacturing process | 14 nm |
| Memory support | DDR4-2666, eight channels, up to 2 TB |
| PCI Express | PCIe 3.0, 128 lanes from the CPU |
| Integrated graphics | None |
| Multiplier | Locked |
| ECC memory | Yes |
| Package | SP3 (LGA-4094) |
| Launch price | $1075 (launch list) |
Motherboard compatibility
AMD EPYC 7401P 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 7401P is
The EPYC 7401P is a twenty four core, forty eight thread server processor with a 2.0 GHz base and up to 3.0 GHz boost. It carries 12 MB of L2 with 64 MB of shared L3 and a 170 W TDP on the 14 nm process. AMD launched it on June 20, 2017 with the EPYC 7001 family.
The P suffix marks single socket only silicon, with dual socket hardware disabled at a discount to the 7401. Boost reaches 3.0 GHz on up to twelve cores with lower all core clocks across all twenty four. The multiplier is locked.
There is no integrated graphics. ECC memory with RDIMM and LRDIMM support is standard. Launch lists agree near $1075. The 170 W rating pairs with DDR4-2666, dropping to 155 W with DDR4-2400.
Socket and motherboard compatibility
The 7401P fits SP3 on single socket server boards. Dual socket boards reject P parts. Check the board vendor list for the exact P SKU before ordering.
Server boards carry eight channel DDR4 and 128 PCIe 3.0 lanes per CPU. Rack chassis need front to back airflow with vendor qualified SP3 heatsinks. Reviews call it a standout value part for single socket virtualization.
The chip ships tray only with no cooler. The EPYC 7401 is the dual socket twin on the same boards where two sockets matter.
Memory, PCIe and cooling
Memory support is DDR4-2666 in eight channels up to 2 TB, with ECC and RDIMM or LRDIMM modules. Dense hosts reward capacity first, so 16 DIMMs with room for growth suit virtualization. DDR4-2400 drops the TDP to 155 W.
PCI Express arrives as version 3.0 with 128 lanes from the CPU for NICs, NVMe and accelerators. Cooling uses vendor 170 W server heatsinks with directed chassis airflow.
Upgrade paths
On the same socket the step up is the 32 core 7551P where thread density matters most, keeping board and DDR4. The 7401P keeps its place where 24 cores cover dense tenants at 1P pricing.
Moving past SP3 means a new board on a current server platform. Rack owners usually add memory or network cards before replacing processors.
Frequently asked questions
What socket does the EPYC 7401P use?
It uses SP3 on single socket server boards. Dual socket boards reject P parts.
How many cores does the 7401P have?
Twenty four cores with multithreading give forty eight threads at 2.0 GHz base with up to 3.0 GHz boost, at 170 W.
What does the P suffix mean?
Single socket only with dual socket hardware disabled, at a discount to the dual socket 7401. Clocks match.
What memory does the 7401P support?
DDR4-2666 in eight channels up to 2 TB, with ECC and RDIMM or LRDIMM modules.
How many PCIe lanes does the 7401P have?
128 PCIe 3.0 lanes from the CPU for NICs, NVMe and accelerators.
Sources and verification
Facts last checked against these sources on . Page last edited on .