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Square green ceramic processor with gold contacts and silver metal heatspreader, SP5 socket form factor

AMD

AMD EPYC 9555 64-core 3.2 GHz server processor 100-000001142

SKU CH-7J1W-9BNE2 MPN 100-000001142

Sixty-four-core server processor with 128 threads, 3.2 GHz base clock, 4.4 GHz boost, 256 MB L3 cache, 12-channel DDR5-6400 memory controller, 128 PCIe 5.0 lanes and 360 W TDP

  • NameEPYC 9555
  • CPU Socket TypeSocket SP5
  • # of Cores64-Core
  • # of Threads128
  • Operating Frequency3.2 GHz
  • Max Turbo Frequency4.4 GHz

Option EPYC 9555

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  • 64 cores and 128 threads handle heavy parallel workloads
  • 2 GHz base with 4.4 GHz max turbo speeds up single-thread tasks
  • 256 MB L3 cache keeps large data sets close to the cores
  • 12-channel DDR5 6400 memory controller feeds bandwidth-hungry applications
  • 128 PCIe 5.0 lanes connect high-speed GPUs and storage directly

EPYC 9555 64-Core Server Processor

The AMD EPYC 9555 is a 5th-generation server processor built for the Socket SP5 platform. It delivers 64 cores and 128 threads at a 3.2 GHz base clock with a 4.4 GHz max turbo frequency. The chip includes 256 MB of L3 cache and a 12-channel DDR5-6400 memory controller. It is sold as a processor only without a cooling device.

Suits dense AI and cloud inference.

This processor targets data-centre workloads such as AI inference, cloud instances and enterprise databases that benefit from high core counts and memory bandwidth. Its 360 W TDP and SP5 socket require server-grade power delivery and cooling infrastructure. It is not intended for workstations, desktops or environments constrained by power, space or thermal limits.

360 W TDP and SP5 socket dictate platform choice

The 360 W thermal design power and Socket SP5 interface are the primary specifications that determine compatibility. Buyers must verify their motherboard supports the SP5 socket and can cool a 360 W processor. The 12-channel DDR5-6400 controller and 128 lanes of PCIe 5.0 define the memory and I/O ceiling for the system.

Highlights

  • 64 cores and 128 threads handle heavy parallel workloads
  • 2 GHz base with 4.4 GHz max turbo speeds up single-thread tasks
  • 256 MB L3 cache keeps large data sets close to the cores
  • 12-channel DDR5 6400 memory controller feeds bandwidth-hungry applications
  • 128 PCIe 5.0 lanes connect high-speed GPUs and storage directly

Specifications

BrandAMD
SeriesAMD EPYC 9005
NameEPYC 9555
Model100-000001142
CPU Socket TypeSocket SP5
# of Cores64-Core
# of Threads128
Operating Frequency3.2 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 Power360W
Cooling DeviceCooling device not included - Processor Only
Shipping weight0.23 kg
Package size127 × 127 × 38 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 can I confirm the EPYC 9555 is running at its 3.2 GHz base and 4.4 GHz turbo frequencies after installation?

Use BIOS or operating-system monitoring tools to verify the CPU reports a 3.2 GHz base clock and reaches 4.4 GHz under load across its 64 cores and 128 threads.

The listing says cooling device not included; what else must I purchase separately for a working Socket SP5 build?

You need an SP5-compatible cooler rated for 360 W TDP, DDR5-6400 memory modules for the 12-channel controller, and a motherboard with the SP5 socket.

The model number 100-000001142 identifies the 9555; how do I decide between the 9005 series SKUs?

Choose the 9555 when you need 64 cores, 256 MB L3 cache, 128 PCIe 5.0 lanes and a 360 W envelope; other 9005 models vary core count, cache and TDP.

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

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