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Square green ceramic processor with gold contact pads and silver heat spreader marked EPYC 9655

AMD

AMD EPYC 9655 100-000000674 96-core 2.6 GHz server processor

SKU CH-BQP6-YQEFP MPN 100-000000674

A 96-core, 192-thread server CPU with 384 MB L3 cache, 12-channel DDR5-6400 memory support and 128 PCIe 5.0 lanes

  • NameEPYC 9655
  • CPU Socket TypeSocket SP5
  • # of Cores96-Core
  • # of Threads192
  • Operating Frequency2.6 GHz
  • Max Turbo Frequency4.5 GHz

Option EPYC 9655

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  • 96 cores and 192 threads handle massive parallel workloads
  • 6 GHz base with 4.5 GHz max turbo accelerates single-thread tasks
  • 384 MB L3 cache keeps large datasets close to the cores
  • 12-channel DDR5-6400 controller feeds memory bandwidth for AI and HPC
  • 128 PCIe 5.0 lanes enable high-speed GPU and storage connectivity

96-core SP5 processor for dense servers

The AMD EPYC 9655 delivers 96 cores and 192 threads in a single Socket SP5 package. A base clock of 2.6 GHz and max turbo of 4.5 GHz feed heavily threaded workloads. The 384 MB L3 cache keeps large working sets close to the cores. Twelve DDR5-6400 channels and 128 PCIe 5.0 lanes provide the memory and I/O bandwidth that dense AI and cloud deployments demand.

Sustained 400 W thermal envelope

Rated at 400 W TDP, the chip is built to hold high frequencies across all 96 cores under continuous load rather than brief bursts. The large L3 cache reduces memory-controller pressure during long-running inference or analytics jobs. Twelve memory channels spread bandwidth evenly so no single channel becomes a bottleneck during extended throughput workloads. Cooling is not included; the platform must dissipate the full 400 W continuously.

Verify SP5 platform and DDR5-6400 support

Confirm the motherboard uses Socket SP5 and a qualified BIOS for the 9005 series. The processor requires twelve DDR5-6400 channels populated for rated bandwidth; fewer channels will reduce throughput. Ensure the chassis and power delivery can sustain 400 W per socket with adequate airflow. No cooler ships in the box, so a compatible SP5 heatsink or liquid cold plate must be sourced separately.

Highlights

  • 96 cores and 192 threads handle massive parallel workloads
  • 6 GHz base with 4.5 GHz max turbo accelerates single-thread tasks
  • 384 MB L3 cache keeps large datasets close to the cores
  • 12-channel DDR5-6400 controller feeds memory bandwidth for AI and HPC
  • 128 PCIe 5.0 lanes enable high-speed GPU and storage connectivity

Specifications

BrandAMD
SeriesAMD EPYC 9005
NameEPYC 9655
Model100-000000674
CPU Socket TypeSocket SP5
# of Cores96-Core
# of Threads192
Operating Frequency2.6 GHz
Max Turbo Frequency4.5 GHz
L3 Cache384MB
64-Bit SupportYes
Integrated Memory Controller SpeedDDR5 6400
Memory Channel12 Channel
PCI Express Revision5.0
Max # of PCI Express Lanes128
Thermal Design Power400W
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 much heat does the 400 W EPYC 9655 generate during sustained all-day operation?

The processor has a 400 W thermal design power, so sustained workloads will dissipate that much heat and require a cooling solution rated for at least 400 W.

What memory and motherboard must I already own for the 96-core EPYC 9655 to function?

You need a Socket SP5 motherboard with 12-channel DDR5-6400 memory populated across all twelve channels.

Will the 128-lane PCIe 5.0 interface on the EPYC 9655 work with my existing PCIe 4.0 add-in cards?

Yes, the 128 PCIe 5.0 lanes are backward compatible, so PCIe 4.0 cards will operate at their native 4.0 speeds.

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