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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

  • Product nameXeon Gold 6421N
  • CPU cores32-Core
  • CPU socketLGA 4677
  • Maximum turbo clock3.6 GHz
  • TDP rating185 W
  • Processor codenameSapphire Rapids
  • 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.

How it compares

Measured against everything we stock in Server Processors, at today’s prices. Recalculated every night.

Price $1,999.99
Pricier than about 59% of the 621 comparable items (median $1,561.99).
CPU cores 32-Core
Higher than about 60% of the 386 comparable items (median 24).
Maximum turbo clock 3.6 GHz
Lower than about 70% of the 327 comparable items (median 3.9 GHz).

New to this? Buying a processor with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameIntel
Product lineIntel Xeon Gold
Model namePK8071305122001
Product nameXeon Gold 6421N
Performance
Working frequency1.8 GHz
Processor
CPU cores32-Core
CPU socketLGA 4677
Maximum turbo clock3.6 GHz
TDP rating185 W
Processor codenameSapphire Rapids
CPU threads64
Level 3 cache60 MB
64-bit capableYes
Process node10 nm
Virtualization supportYes
CPU socket scalability1S Only
Maximum PCIe lanes80
Memory
Supported memory speedDDR5 4800
Max supported memory4 TB
Channel configuration8 Channel
Ports & slots
PCIe generation5.0
Size & build
Shipping weight0.23 kg
Package size127 × 102 × 13 mm
In the box
Included coolerNot included - Processor Only
More details
Multimedia instructionIntel AMX, Intel SSE4.2, Intel AVX, Intel AVX2, Intel AVX-512

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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