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Square green ceramic processor with gold contacts and silver heat spreader, SP5 socket form factor

AMD

AMD EPYC 9355 32-Core 3.55 GHz Server Processor 100-000001148

SKU CH-KNZ1-62C93 MPN 100-000001148

32-core server processor with 64 threads, 3.55 GHz base clock, 4.4 GHz max turbo, 256 MB L3 cache, DDR5-6400 12-channel memory support, 128 PCIe 5.0 lanes, and 280 W TDP

  • NameEPYC 9355
  • CPU Socket TypeSocket SP5
  • # of Cores32-Core
  • # of Threads64
  • Operating Frequency3.55 GHz
  • Max Turbo Frequency4.4 GHz

Option EPYC 9355

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  • 32 cores and 64 threads handle heavy multitasking
  • 55 GHz base with 4.4 GHz turbo for responsive compute
  • 256 MB L3 cache reduces memory latency
  • 12-channel DDR5 6400 controller feeds data fast
  • 128 PCIe 5.0 lanes enable high-throughput I/O

32-Core EPYC 9355 for dense server compute

The AMD EPYC 9355 is a 32-core, 64-thread server processor built on the 9005 series architecture. It operates at a 3.55 GHz base clock with a 4.4 GHz maximum turbo frequency and fits the Socket SP5 platform. A 256 MB L3 cache and 12-channel DDR5-6400 memory controller feed data to all cores, while 128 lanes of PCI Express 5.0 provide extensive I/O bandwidth for accelerators and storage. The processor carries a 280 W thermal design power and ships without a cooling device.

Suited for high-core-count workloads.

This CPU targets data-centre deployments that need maximum thread density per socket, such as virtualisation hosts, AI inference nodes and high-performance databases. Buyers who require lower power envelopes or fewer cores for smaller-scale applications should evaluate other SKUs in the 9005 series. The 12-channel memory subsystem also demands a platform that can populate all channels to realise full bandwidth.

128 lanes of PCIe 5.0 decide GPU and storage scale

The single specification that determines fit is the 128 lanes of PCI Express 5.0 connectivity. This lane count defines how many GPUs, high-speed drives, or network adapters can attach directly to the processor without a switch. If the target server design needs fewer lanes or relies on an older PCIe generation, a different processor may be more cost-effective.

Highlights

  • 32 cores and 64 threads handle heavy multitasking
  • 55 GHz base with 4.4 GHz turbo for responsive compute
  • 256 MB L3 cache reduces memory latency
  • 12-channel DDR5 6400 controller feeds data fast
  • 128 PCIe 5.0 lanes enable high-throughput I/O

Specifications

BrandAMD
SeriesAMD EPYC 9005
NameEPYC 9355
Model100-000001148
CPU Socket TypeSocket SP5
# of Cores32-Core
# of Threads64
Operating Frequency3.55 GHz
Max Turbo Frequency4.4 GHz
L3 Cache256MB
64-Bit SupportYes
Integrated Memory Controller SpeedDDR5 6400
Memory Channel12 Channel
PCI Express Revision5.0
Max # of PCI Express Lanes128
Thermal Design Power280W
Cooling DeviceCooling device not included - Processor Only
Shipping weight0.16 kg
Package size102 × 91 × 10 mm

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I choose between the 32-core 9355 and other EPYC 9005 models?

The 9355 delivers 32 cores and 64 threads at a 3.55 GHz base clock with 256 MB L3 cache, positioning it for dense virtualization and AI inference where core count and cache matter more than maximum frequency.

What does the 3.55 GHz base clock mean once the chip is installed in a server?

It guarantees 3.55 GHz across all 32 cores under sustained load, with a 4.4 GHz max turbo for bursty single-threaded work, so throughput scales predictably for database and container workloads.

What does the DDR5 6400 12-channel memory interface cap in practice?

Twelve channels of DDR5 6400 provide up to 12 memory modules at 6400 MT/s each, delivering peak bandwidth for memory-bound HPC and AI tasks while the 128 PCIe 5.0 lanes handle GPU and storage I/O.

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