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

AMD

AMD EPYC 9645 100-000001461 96-core 2.3 GHz server processor

SKU CH-Q24S-8970N MPN 100-000001461

96-core server CPU with 192 threads, 2.3 GHz base clock, 3.7 GHz turbo, 256 MB L3 cache, DDR5-6400 12-channel memory, 128 PCIe 5.0 lanes, 320 W TDP, Socket SP5

  • Product nameEPYC 9645
  • CPU cores96-Core
  • CPU socketSocket SP5
  • Maximum turbo clock3.7 GHz
  • TDP rating320 W
  • CPU threads192

Model EPYC 9645

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  • 96 cores and 192 threads handle massive parallel workloads
  • 3 GHz base with 3.7 GHz turbo speeds through demanding tasks
  • 256 MB L3 cache reduces latency for complex calculations
  • 12-channel DDR5 6400 memory controller feeds data-intensive applications
  • 128 PCIe 5.0 lanes enable high-throughput GPU and storage connectivity

High-density 96-core server processor

The AMD EPYC 9645 is a 5th generation server CPU built for dense, compute-intensive data-centre workloads. It delivers 96 cores and 192 threads at a 2.3 GHz base clock with a 3.7 GHz max turbo frequency. A 256 MB L3 cache supports high-throughput processing for AI inference, cloud and enterprise applications. This processor targets operators who need maximum core count per socket.

Twelve-channel DDR5 6400 and PCIe 5.0 limits

Memory runs on twelve channels of DDR5 at 6400 MT/s, so bandwidth scales with fully populated DIMM slots. PCI Express 5.0 provides 128 lanes for GPU, storage and networking expansion, but total throughput depends on the platform's lane allocation and switch topology. The 320 W TDP sets a firm thermal ceiling that constrains sustained boost behaviour under heavy all-core loads.

Verify SP5 platform and cooling capacity

Confirm your motherboard uses the Socket SP5 interface and supports the EPYC 9005 series with a qualified BIOS. Ensure the chassis and cooling solution can dissipate 320 W continuously, as no cooler is included. Validate that your memory kits are DDR5 6400 compatible and that the power-delivery subsystem meets the processor's current demands.

How it compares

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

Price $6,264.99
Pricier than about 90% of the 621 comparable items (median $1,561.99).
CPU cores 96-Core
Higher than about 91% of the 386 comparable items (median 24).
Maximum turbo clock 3.7 GHz
Lower than about 60% 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 nameAMD
Product lineAMD EPYC 9005
Model name100-000001461
Product nameEPYC 9645
Performance
Working frequency2.3 GHz
Processor
CPU cores96-Core
CPU socketSocket SP5
Maximum turbo clock3.7 GHz
TDP rating320 W
CPU threads192
Level 3 cache256 MB
64-bit capableYes
Maximum PCIe lanes128
Memory
Supported memory speedDDR5 6400
Channel configuration12 Channel
Ports & slots
PCIe generation5.0
Size & build
Shipping weight0.23 kg
Package size127 × 127 × 38 mm
In the box
Included coolerNot included - Processor Only

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 96-core EPYC 9645 or a lower-core model in the 9005 series?

The 9645 provides 96 cores and 192 threads at a 2.3 GHz base clock with 3.7 GHz max turbo, while other 9005 models offer fewer cores and different frequency profiles.

What does the 2.3 GHz base clock mean for sustained workloads on this processor?

The 2.3 GHz base frequency is the guaranteed all-core speed under the 320 W TDP; sustained throughput scales across all 96 cores and 192 threads with 256 MB L3 cache.

How does the PCIe 5.0 interface with 128 lanes limit expansion in a dual-socket server?

Each CPU delivers 128 PCIe 5.0 lanes, so a two-socket platform provides 256 lanes total for GPUs, storage and networking without sharing bandwidth between sockets.

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