AMD EPYC 7401 socket: SP3
The AMD EPYC 7401 uses the SP3 socket on server boards. It is a 24 core Naples chip for dense virtualization racks with dual socket support.
AMD EPYC 7401 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) |
Motherboard compatibility
AMD EPYC 7401 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 7401 is
The EPYC 7401 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.
Boost reaches 3.0 GHz on up to twelve cores with lower all core clocks across all twenty four. Twenty four cores cover dense tenants in one or two socket designs. The multiplier is locked.
There is no integrated graphics. ECC memory with RDIMM, LRDIMM and NVDIMM support is standard. Pricing is omitted here because launch lists split between $1450, $1850 and $1999.
Socket and motherboard compatibility
The 7401 fits SP3 on server boards with eight channel DDR4. Boards need a BIOS with Naples support and the exact SKU on the vendor list. It runs in one or two socket designs.
Server boards carry 128 PCIe 3.0 lanes per CPU for NICs, NVMe and accelerators. Rack chassis need front to back airflow with vendor qualified heatsinks.
The chip ships tray only with no cooler. The EPYC 7401P is the single socket twin on the same boards at 1P pricing.
Memory, PCIe and cooling
Memory support is DDR4-2666 in eight channels up to 2 TB, with ECC and RDIMM, LRDIMM or NVDIMM modules. Dense hosts reward capacity first, so 16 DIMMs suit 48 threads. DDR4-2400 drops the TDP to 155 W.
PCI Express arrives as version 3.0 with 128 lanes from the CPU. Cooling uses vendor 170 W server heatsinks with directed chassis airflow.
Upgrade paths
On the same socket the step up is a 32 core part where thread density matters most, keeping board and DDR4. The 7401 keeps its place where 24 cores cover dense racks.
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 7401 use?
It uses SP3 on server boards with a BIOS that lists Naples parts. It runs in one or two socket designs.
How many cores does the 7401 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 memory does the 7401 support?
DDR4-2666 in eight channels up to 2 TB, with ECC and RDIMM, LRDIMM or NVDIMM modules.
How does the 7401 differ from the 7401P?
The 7401P matches clocks for single socket racks at 1P pricing. The 7401 adds dual socket support.
How many PCIe lanes does the 7401 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 .