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

AMD

AMD EPYC 9455 48-Core 3.15 GHz 256MB SP5 300W 100-000001542 server processor

SKU CH-3J2Y-0MWE1 MPN 100-000001542

48-core server CPU with 96 threads, 3.15 GHz base and 4.4 GHz boost, 256 MB L3 cache, DDR5-6400 12-channel memory, 128 PCIe 5.0 lanes, 300 W TDP, SP5 socket

  • Product nameEPYC 9455
  • CPU cores48-Core
  • CPU socketSocket SP5
  • Maximum turbo clock4.4 GHz
  • TDP rating300 W
  • CPU threads96

Model EPYC 9455

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  • 48 cores and 96 threads handle heavy parallel workloads
  • 15 GHz base clock up to 4.4 GHz boost for responsive compute
  • 256 MB L3 cache reduces latency on large data sets
  • 12-channel DDR5 6400 controller feeds memory bandwidth to all cores
  • 128 PCIe 5.0 lanes connect high-speed GPUs and storage

AMD EPYC 9455 48-Core SP5 Processor

The AMD EPYC 9455 is a 5th Generation server CPU built for Socket SP5 platforms. It delivers 48 cores and 96 threads with a base frequency of 3.15 GHz and a max turbo of 4.4 GHz. A 256 MB L3 cache supports high-throughput data access. The processor integrates a 12-channel DDR5-6400 memory controller and provides 128 lanes of PCIe 5.0 connectivity. Its thermal design power is rated at 300 W and no cooling device is included.

Suited for dense AI inference and cloud workloads

This processor targets data centres running CPU-based AI inference, virtualisation, and high-performance cloud services where core density and memory bandwidth reduce rack count. Buyers needing integrated graphics, desktop socket compatibility, or lower power envelopes for edge deployments should evaluate alternative products. Workloads that rely on GPU acceleration exclusively will not utilise the CPU compute resources efficiently.

Verify SP5 platform and DDR5 memory compatibility

Confirm the motherboard uses the SP5 socket and supports 12-channel DDR5-6400 memory population. Ensure the cooling solution is rated for a 300 W TDP and that the chassis provides adequate airflow for sustained operation. Check that the system BIOS includes support for 5th Generation EPYC 9005 series processors before installation.

How it compares

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

Price $4,259.99
Pricier than about 83% of the 621 comparable items (median $1,561.99).
CPU cores 48-Core
Higher than about 77% of the 386 comparable items (median 24).
Maximum turbo clock 4.4 GHz
Higher than about 82% 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 name100-000001542
Product nameEPYC 9455
Performance
Working frequency3.15 GHz
Processor
CPU cores48-Core
CPU socketSocket SP5
Maximum turbo clock4.4 GHz
TDP rating300 W
CPU threads96
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 weight0.16 kg
Package size102 × 91 × 10 mm
In the box
Included coolerNot included - Processor Only

Other versions of this model

5 more in the same range

Questions about this item

Will my motherboard need an SP5 socket to install the EPYC 9455?

Yes, the processor uses the SP5 socket, so the board must provide that exact socket type.

Can I keep my existing DDR5-6400 memory modules when upgrading to this 12-channel CPU?

The integrated controller runs DDR5 at 6400 MT/s across 12 channels, so compatible DDR5-6400 DIMMs will work at rated speed.

How do I verify the 96 threads are active after the system posts?

Check the OS task manager or run lscpu; both should report 48 cores and 96 threads for the EPYC 9455.

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