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Square green circuit board with gold contacts and silver metal heat spreader, Intel Xeon branding visible

Intel

Intel PK8071305122001 Xeon Gold 6421N 32-core 1.8 GHz server processor

SKU CH-JAEV-6E6GC MPN PK8071305122001

32-core server processor reaching 3.6 GHz with 60 MB L3 cache and eight-channel DDR5-4800 support

  • NameXeon Gold 6421N
  • CPU Socket TypeLGA 4677
  • Core NameSapphire Rapids
  • # of Cores32-Core
  • # of Threads64
  • Operating Frequency1.8 GHz
  • 32 cores and 64 threads handle heavy parallel workloads
  • 8 GHz base with 3.6 GHz max turbo balances speed and power
  • 60 MB L3 cache keeps large data sets close to the cores
  • Eight-channel DDR5 4800 controller supports up to 4 TB memory
  • PCIe 5.0 with 80 lanes delivers high-bandwidth I/O for accelerators

Intel Xeon Gold 6421N 32-core server processor

The Intel Xeon Gold 6421N is a 32-core, 64-thread server CPU built on 10 nm Sapphire Rapids architecture. It operates at a 1.8 GHz base frequency with a 3.6 GHz maximum turbo frequency and provides 60 MB of L3 cache. This processor targets single-socket servers handling virtualisation, database and compute-intensive workloads.

DDR5 4800 eight-channel memory

The integrated memory controller supports DDR5 4800 across eight channels with a maximum capacity of 4 TB. PCI Express 5.0 delivers up to 80 lanes for high-speed storage and networking expansion. Single-socket scalability means this CPU cannot be paired with a second processor in a dual-socket configuration.

LGA 4677 socket and 185 W thermal design

The processor fits the LGA 4677 socket and carries a 185 W thermal design power; a cooling solution is not included and must be sourced separately. Intel AMX, AVX-512, AVX2, AVX and SSE4.2 instruction sets accelerate AI inference and vector workloads. The 1S-only design limits deployment to single-processor motherboards.

Highlights

  • 32 cores and 64 threads handle heavy parallel workloads
  • 8 GHz base with 3.6 GHz max turbo balances speed and power
  • 60 MB L3 cache keeps large data sets close to the cores
  • Eight-channel DDR5 4800 controller supports up to 4 TB memory
  • PCIe 5.0 with 80 lanes delivers high-bandwidth I/O for accelerators

Specifications

BrandIntel
SeriesIntel Xeon Gold
NameXeon Gold 6421N
ModelPK8071305122001
CPU Socket TypeLGA 4677
Core NameSapphire Rapids
# of Cores32-Core
# of Threads64
Operating Frequency1.8 GHz
Max Turbo Frequency3.6 GHz
L3 Cache60MB
64-Bit SupportYes
Manufacturing Tech10 nm
Integrated Memory Controller SpeedDDR5 4800
Maximum Memory Capacity4TB
Memory Channel8 Channel
Virtualization Technology SupportYes
Scalability1S Only
PCI Express Revision5.0
Max # of PCI Express Lanes80
Multimedia InstructionIntel AMX, Intel SSE4.2, Intel AVX, Intel AVX2, Intel AVX-512
Thermal Design Power185W
Cooling DeviceCooling device not included - Processor Only
Shipping weight0.23 kg
Package size127 × 102 × 13 mm

Questions about this item

Should I choose the 32-core 1.8 GHz version or a higher-frequency model with fewer cores?

This model delivers 32 cores and 64 threads at 1.8 GHz base with a 3.6 GHz max turbo, giving high multi-thread throughput for virtualisation or database workloads.

What does the 3.6 GHz max turbo frequency mean once the chip is installed in a server?

The processor can lift up to 3.6 GHz on active cores when thermal headroom allows, boosting single-thread performance while the 185 W TDP sets the sustained power envelope.

How does the PCI Express 5.0 interface with 80 lanes affect expansion capacity?

PCIe 5.0 provides up to 80 lanes, allowing multiple high-bandwidth devices such as GPUs or storage arrays without lane contention.

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