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AMD · CPU

AMD EPYC 9455

AMD EPYC 9455 — Specifications and benchmarks. .

These specifications are supported by the linked sources. Core counts, clocks and memory capacities do not predict workload performance. Check benchmark versions, environments and sample counts.

Evidence review in progress · Search indexing deferred

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Power

ParameterValue and conditions
TDP
300 W
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Default TDP",
  "raw_value": "300W",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "Default TDP",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
300 W
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Default TDP",
  "raw_value": "300W",
  "qualifiers": {
    "source_field": "Default TDP",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}

Compute

ParameterValue and conditions
Base clock
3,150 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Base Clock",
  "raw_value": "3.15 GHz",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "Base Clock",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
3,150 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Base Clock",
  "raw_value": "3.15 GHz",
  "qualifiers": {
    "source_field": "Base Clock",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}
Max boost clock
4,400 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Max. Boost Clock",
  "raw_value": "Up to 4.4 GHz",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "Max. Boost Clock",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
4,400 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Max. Boost Clock",
  "raw_value": "Up to 4.4 GHz",
  "qualifiers": {
    "source_field": "Max. Boost Clock",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}
CPU cores
48
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of CPU Cores",
  "raw_value": "48",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "# of CPU Cores",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
48
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of CPU Cores",
  "raw_value": "48",
  "qualifiers": {
    "source_field": "# of CPU Cores",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}
threads
96
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of Threads",
  "raw_value": "96",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "# of Threads",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
96
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of Threads",
  "raw_value": "96",
  "qualifiers": {
    "source_field": "# of Threads",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}

Memory

ParameterValue and conditions
L3 cache
256 MB
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "L3 Cache",
  "raw_value": "256 MB",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "L3 Cache",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
256 MB
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "L3 Cache",
  "raw_value": "256 MB",
  "qualifiers": {
    "source_field": "L3 Cache",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}
Max capacity by memory type
1 DIMM/channel: 6 TB per processor at 6000 MT/s; 2 DIMMs/channel: 12 TB at 4000 MT/s (AMD 58471 rev. 1.0). Other AMD documents disagree; confirm validated DIMMs and BIOS with the system vendor.
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Conditional maximum supported memory",
  "raw_value": "1 DIMM/channel: 6 TB per processor at 6000 MT/s; 2 DIMMs/channel: 12 TB at 4000 MT/s (AMD 58471 rev. 1.0). Other AMD documents disagree; confirm validated DIMMs and BIOS with the system vendor.",
  "qualifiers": {
    "capacity_conditions": [
      {
        "capacity_tb": 6,
        "dpc": 1,
        "memory_speed_mts": 6000
      },
      {
        "capacity_tb": 12,
        "dpc": 2,
        "memory_speed_mts": 4000
      }
    ],
    "capacity_scope": "per-processor",
    "conflicting_source_urls": [
      "https://docs.amd.com/api/khub/documents/xG3lMw~fCmrqvz4A0sDWug/content",
      "https://www.amd.com/content/dam/amd/en/documents/epyc-business-docs/datasheets/amd-epyc-9005-series-processor-datasheet.pdf",
      "https://www.amd.com/en/partner/articles/epyc-9005-series-processors.html"
    ],
    "evidence_checked_at": "2026-10-10T11:39:43.416175+00:00",
    "family": "EPYC 9005 Series",
    "memory_type": "DDR5",
    "not_board_slot_count": true,
    "not_installed_ram": true,
    "source_conflict": "9005-memory-capacity-conflict",
    "source_field": "Conditional maximum supported memory",
    "source_revision": "58471rev1.0 October2024",
    "source_row": 16,
    "source_section": "2.2Memory printed page3",
    "source_sha256": "78ab66a6a7b1d5123eebe3e2907ce1ec37e57bbd211834019f5918283b81cd48"
  },
  "document_id": "reaudit-epyc-9005-conditional-memory-78ab66a6a7b1d512"
}
Memory channels
12
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Memory Channels",
  "raw_value": "12",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "Memory Channels",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
12
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Memory Channels",
  "raw_value": "12",
  "qualifiers": {
    "source_field": "Memory Channels",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}
Published DIMM populations
12, 24
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Published DIMM populations",
  "raw_value": "12, 24",
  "qualifiers": {
    "document_section": "9005 architecture and DIMM population",
    "scope": "per processor; board layout illustrative",
    "source_field": "Published DIMM populations",
    "source_row": 16
  },
  "document_id": "topology-epyc-9005-d7ac928e263a085a"
}
Supported RAM module types
RDIMM
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "System Memory Subtype",
  "raw_value": "RDIMM",
  "qualifiers": {
    "retrieval_method": "reviewed structured extraction from readable primary-source text",
    "scope": "9004/9005 SP5 family; RDIMM-3DS is also documented",
    "source_field": "System Memory Subtype",
    "source_row": 40,
    "source_url": "https://www.asrockrack.com/minisite/AMD-EPYC-9005-Server/"
  },
  "document_id": "topology-epyc-rdimm-948df062512a03d7"
}
Memory type
DDR5
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "System Memory Type",
  "raw_value": "DDR5",
  "qualifiers": {
    "release_evidence": "dated-manufacturer-listing",
    "source_field": "System Memory Type",
    "source_product_url": "https://www.amd.com/en/products/processors/server/epyc/9005-series/amd-epyc-9455.html",
    "source_row": 47
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
DDR5
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "System Memory Type",
  "raw_value": "DDR5",
  "qualifiers": {
    "source_field": "System Memory Type",
    "source_row": 1
  },
  "document_id": "detail-89cc83d7ed396a9a-ed38a605baaacfe6"
}

Connectivity and features

ParameterValue and conditions
Socket
SP5
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "CPU Socket",
  "raw_value": "SP5",
  "qualifiers": {
    "document_section": "9005 architecture and DIMM population",
    "scope": "per processor; board layout illustrative",
    "source_field": "CPU Socket",
    "source_row": 16
  },
  "document_id": "topology-epyc-9005-d7ac928e263a085a"
}

Public benchmarks

Compare results with matching versions, scenes, settings and statistics. A run count of 0 identifies an aggregate or reported value, not a newly measured run.

Blender (4)

Blender scene rendering

Too few submissions · No representative score

Run count: 2

Too few submissions · Individual results onlyn = 2

4.5.0 · classroom · CPU · Linux · Ubuntu · 24.04 · 2P · 96 cores · 192 threads

Counts represent submissions; the number of independent systems is unknown. Stock or overclocked status, RAM and power settings are also unknown.

Measurement scope and interpretation

Sample thresholds are an initial display policy, not a guarantee of statistical confidence. P95 is not a theoretical limit. OS submission shares do not represent user market share.

Observed minimum / maximum
700.48 / 703.89
Measurement dates
2025-10-31 – 2025-10-31
Duplicate submissions removed
0
Quantile calculation
linear interpolation · (n−1) × p

View source ↗

{
  "analysis": {
    "duplicates_removed": 0,
    "independent_system_count": null,
    "individual_results": [
      {
        "measured_at": "2025-10-31T12:57:42.724594+00:00",
        "score": 703.8926758077846,
        "source_record_id": "6f4b03b8-0918-47ca-9631-544379bd0ab0"
      },
      {
        "measured_at": "2025-10-31T12:59:56.767248+00:00",
        "score": 700.4823643614739,
        "source_record_id": "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
      }
    ],
    "median": null,
    "observed_max": 703.8926758077846,
    "observed_min": 700.4823643614739,
    "policy": "submitted-runs-v1",
    "quantile_method": "linear interpolation at (n-1)*p",
    "sample_count": 2,
    "sample_status": "individual",
    "settings_status": "unknown"
  },
  "comparison_readiness": "observational-only",
  "condition": {
    "benchmark": "Blender",
    "environment": {
      "backend": "CPU",
      "benchmark_script": "3.1.1",
      "device_name": "AMD EPYC 9455 48-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "24.04",
      "driver": null,
      "num_cpu_cores": 96,
      "num_cpu_sockets": 2,
      "num_cpu_threads": 192,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "classroom",
    "scene_checksum": "936f0a528f03eba291c67ea87743a0ebde58938fb87471b262721b89b46b875d",
    "version": "4.5.0"
  },
  "condition_id": "eebd4b07c4a1b4fd8272",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "6f4b03b8-0918-47ca-9631-544379bd0ab0",
    "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
  ],
  "measured_from": "2025-10-31T12:57:42.724594+00:00",
  "measured_to": "2025-10-31T12:59:56.767248+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9455",
  "run_count": 2,
  "sample_status": "individual"
}

Blender scene rendering

Too few submissions · No representative score

Run count: 2

Too few submissions · Individual results onlyn = 2

4.5.0 · junkshop · CPU · Linux · Ubuntu · 24.04 · 2P · 96 cores · 192 threads

Counts represent submissions; the number of independent systems is unknown. Stock or overclocked status, RAM and power settings are also unknown.

Measurement scope and interpretation

Sample thresholds are an initial display policy, not a guarantee of statistical confidence. P95 is not a theoretical limit. OS submission shares do not represent user market share.

Observed minimum / maximum
906.19 / 909.47
Measurement dates
2025-10-31 – 2025-10-31
Duplicate submissions removed
0
Quantile calculation
linear interpolation · (n−1) × p

View source ↗

{
  "analysis": {
    "duplicates_removed": 0,
    "independent_system_count": null,
    "individual_results": [
      {
        "measured_at": "2025-10-31T12:57:06.895291+00:00",
        "score": 909.4740604287896,
        "source_record_id": "6f4b03b8-0918-47ca-9631-544379bd0ab0"
      },
      {
        "measured_at": "2025-10-31T12:59:24.652368+00:00",
        "score": 906.1920206760163,
        "source_record_id": "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
      }
    ],
    "median": null,
    "observed_max": 909.4740604287896,
    "observed_min": 906.1920206760163,
    "policy": "submitted-runs-v1",
    "quantile_method": "linear interpolation at (n-1)*p",
    "sample_count": 2,
    "sample_status": "individual",
    "settings_status": "unknown"
  },
  "comparison_readiness": "observational-only",
  "condition": {
    "benchmark": "Blender",
    "environment": {
      "backend": "CPU",
      "benchmark_script": "3.1.1",
      "device_name": "AMD EPYC 9455 48-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "24.04",
      "driver": null,
      "num_cpu_cores": 96,
      "num_cpu_sockets": 2,
      "num_cpu_threads": 192,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "junkshop",
    "scene_checksum": "f5515a21a1337b908212d8d76733530df83014464a24c585ab7b96000da0cdce",
    "version": "4.5.0"
  },
  "condition_id": "ddb48c2bf35ea0719d9d",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "6f4b03b8-0918-47ca-9631-544379bd0ab0",
    "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
  ],
  "measured_from": "2025-10-31T12:57:06.895291+00:00",
  "measured_to": "2025-10-31T12:59:24.652368+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9455",
  "run_count": 2,
  "sample_status": "individual"
}

Blender scene rendering

Too few submissions · No representative score

Run count: 2

Too few submissions · Individual results onlyn = 2

4.5.0 · monster · CPU · Linux · Ubuntu · 24.04 · 2P · 96 cores · 192 threads

Counts represent submissions; the number of independent systems is unknown. Stock or overclocked status, RAM and power settings are also unknown.

Measurement scope and interpretation

Sample thresholds are an initial display policy, not a guarantee of statistical confidence. P95 is not a theoretical limit. OS submission shares do not represent user market share.

Observed minimum / maximum
1,348.17 / 1,364.48
Measurement dates
2025-10-31 – 2025-10-31
Duplicate submissions removed
0
Quantile calculation
linear interpolation · (n−1) × p

View source ↗

{
  "analysis": {
    "duplicates_removed": 0,
    "independent_system_count": null,
    "individual_results": [
      {
        "measured_at": "2025-10-31T12:56:21.829339+00:00",
        "score": 1348.169500391352,
        "source_record_id": "6f4b03b8-0918-47ca-9631-544379bd0ab0"
      },
      {
        "measured_at": "2025-10-31T12:58:43.260005+00:00",
        "score": 1364.4844966599885,
        "source_record_id": "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
      }
    ],
    "median": null,
    "observed_max": 1364.4844966599885,
    "observed_min": 1348.169500391352,
    "policy": "submitted-runs-v1",
    "quantile_method": "linear interpolation at (n-1)*p",
    "sample_count": 2,
    "sample_status": "individual",
    "settings_status": "unknown"
  },
  "comparison_readiness": "observational-only",
  "condition": {
    "benchmark": "Blender",
    "environment": {
      "backend": "CPU",
      "benchmark_script": "3.1.1",
      "device_name": "AMD EPYC 9455 48-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "24.04",
      "driver": null,
      "num_cpu_cores": 96,
      "num_cpu_sockets": 2,
      "num_cpu_threads": 192,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "monster",
    "scene_checksum": "8ff812a02f720433de1403dab447be9541eecca71cc919224a7790d017c1b2ce",
    "version": "4.5.0"
  },
  "condition_id": "ca87894fd151de8dd55f",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "6f4b03b8-0918-47ca-9631-544379bd0ab0",
    "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
  ],
  "measured_from": "2025-10-31T12:56:21.829339+00:00",
  "measured_to": "2025-10-31T12:58:43.260005+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9455",
  "run_count": 2,
  "sample_status": "individual"
}

Blender complete benchmark

Too few submissions · No representative score

Run count: 2

Too few submissions · Individual results onlyn = 2

4.5.0 · monster + junkshop + classroom · CPU · Linux · Ubuntu · 24.04 · 2P · 96 cores · 192 threads

Counts represent submissions; the number of independent systems is unknown. Stock or overclocked status, RAM and power settings are also unknown.

Measurement scope and interpretation

Sample thresholds are an initial display policy, not a guarantee of statistical confidence. P95 is not a theoretical limit. OS submission shares do not represent user market share.

Observed minimum / maximum
2,961.54 / 2,971.16
Measurement dates
2025-10-31 – 2025-10-31
Duplicate submissions removed
0
Quantile calculation
linear interpolation · (n−1) × p

View source ↗

{
  "analysis": {
    "duplicates_removed": 0,
    "independent_system_count": null,
    "individual_results": [
      {
        "measured_at": "2025-10-31T12:57:42.724594+00:00",
        "score": 2961.536236627926,
        "source_record_id": "6f4b03b8-0918-47ca-9631-544379bd0ab0"
      },
      {
        "measured_at": "2025-10-31T12:59:56.767248+00:00",
        "score": 2971.1588816974786,
        "source_record_id": "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
      }
    ],
    "median": null,
    "observed_max": 2971.1588816974786,
    "observed_min": 2961.536236627926,
    "policy": "submitted-runs-v1",
    "quantile_method": "linear interpolation at (n-1)*p",
    "sample_count": 2,
    "sample_status": "individual",
    "settings_status": "unknown"
  },
  "comparison_readiness": "observational-only",
  "condition": {
    "benchmark": "Blender",
    "environment": {
      "backend": "CPU",
      "benchmark_script": "3.1.1",
      "device_name": "AMD EPYC 9455 48-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "24.04",
      "driver": null,
      "num_cpu_cores": 96,
      "num_cpu_sockets": 2,
      "num_cpu_threads": 192,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "monster + junkshop + classroom",
    "scene_checksum": "c3453da9769193d968fb1cc675fd7f92a3424abe9ac730218f2e00b953389356",
    "version": "4.5.0"
  },
  "condition_id": "23bff8e9852031e874ef",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "6f4b03b8-0918-47ca-9631-544379bd0ab0",
    "ccec52df-ec7c-4f3b-bfed-a653f26840b7"
  ],
  "measured_from": "2025-10-31T12:57:42.724594+00:00",
  "measured_to": "2025-10-31T12:59:56.767248+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.total_samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9455",
  "run_count": 2,
  "sample_status": "individual"
}

Sources

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