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AMD · CPU

AMD EPYC 9845

AMD EPYC 9845 — 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
390 W
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Default TDP",
  "raw_value": "390W",
  "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-9845.html",
    "source_row": 33
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
390 W
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Default TDP",
  "raw_value": "390W",
  "qualifiers": {
    "source_field": "Default TDP",
    "source_row": 1
  },
  "document_id": "detail-e460bb8499d5c9ae-dec027fe188393b3"
}

Compute

ParameterValue and conditions
Base clock
2,100 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Base Clock",
  "raw_value": "2.1 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-9845.html",
    "source_row": 33
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
2,100 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Base Clock",
  "raw_value": "2.1 GHz",
  "qualifiers": {
    "source_field": "Base Clock",
    "source_row": 1
  },
  "document_id": "detail-e460bb8499d5c9ae-dec027fe188393b3"
}
Max boost clock
3,700 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Max. Boost Clock",
  "raw_value": "Up to 3.7 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-9845.html",
    "source_row": 33
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
3,700 MHz
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "Max. Boost Clock",
  "raw_value": "Up to 3.7 GHz",
  "qualifiers": {
    "source_field": "Max. Boost Clock",
    "source_row": 1
  },
  "document_id": "detail-e460bb8499d5c9ae-dec027fe188393b3"
}
CPU cores
160
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of CPU Cores",
  "raw_value": "160",
  "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-9845.html",
    "source_row": 33
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
160
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of CPU Cores",
  "raw_value": "160",
  "qualifiers": {
    "source_field": "# of CPU Cores",
    "source_row": 1
  },
  "document_id": "detail-e460bb8499d5c9ae-dec027fe188393b3"
}
threads
320
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of Threads",
  "raw_value": "320",
  "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-9845.html",
    "source_row": 33
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
320
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "# of Threads",
  "raw_value": "320",
  "qualifiers": {
    "source_field": "# of Threads",
    "source_row": 1
  },
  "document_id": "detail-e460bb8499d5c9ae-dec027fe188393b3"
}

Memory

ParameterValue and conditions
L3 cache
320 MB
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "L3 Cache",
  "raw_value": "320 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-9845.html",
    "source_row": 33
  },
  "document_id": "amd-server-table-ba5dc2e1f3f72b71"
}
320 MB
Source and conditions

View source ↗

{
  "state": "known",
  "raw_label": "L3 Cache",
  "raw_value": "320 MB",
  "qualifiers": {
    "source_field": "L3 Cache",
    "source_row": 1
  },
  "document_id": "detail-e460bb8499d5c9ae-dec027fe188393b3"
}
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": 2,
    "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-9845.html",
    "source_row": 33
  },
  "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-e460bb8499d5c9ae-dec027fe188393b3"
}
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": 2
  },
  "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": 26,
    "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-9845.html",
    "source_row": 33
  },
  "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-e460bb8499d5c9ae-dec027fe188393b3"
}

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": 2
  },
  "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

5.1.1 · classroom · CPU · Linux · Ubuntu · 26.04 · 1P · 160 cores · 320 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
798.5 / 798.66
Measurement dates
2026-05-11 – 2026-05-11
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": "2026-05-11T10:27:30.025528+00:00",
        "score": 798.5023380194805,
        "source_record_id": "b8ddf8d6-3360-454a-84e5-3e821d9bd32f"
      },
      {
        "measured_at": "2026-05-11T10:46:19.506697+00:00",
        "score": 798.6638869719741,
        "source_record_id": "3483db1f-3d45-45f5-a8b0-818539ab1b64"
      }
    ],
    "median": null,
    "observed_max": 798.6638869719741,
    "observed_min": 798.5023380194805,
    "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": "3.1.2",
      "device_name": "AMD EPYC 9845 160-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "26.04",
      "driver": null,
      "num_cpu_cores": 160,
      "num_cpu_sockets": 1,
      "num_cpu_threads": 320,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "classroom",
    "scene_checksum": "936f0a528f03eba291c67ea87743a0ebde58938fb87471b262721b89b46b875d",
    "version": "5.1.1"
  },
  "condition_id": "a8687b8f824cc6bf3abb",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "b8ddf8d6-3360-454a-84e5-3e821d9bd32f",
    "3483db1f-3d45-45f5-a8b0-818539ab1b64"
  ],
  "measured_from": "2026-05-11T10:27:30.025528+00:00",
  "measured_to": "2026-05-11T10:46:19.506697+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9845",
  "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

5.1.1 · junkshop · CPU · Linux · Ubuntu · 26.04 · 1P · 160 cores · 320 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
1,199.28 / 1,214.59
Measurement dates
2026-05-11 – 2026-05-11
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": "2026-05-11T10:26:56.180649+00:00",
        "score": 1199.2779189554856,
        "source_record_id": "b8ddf8d6-3360-454a-84e5-3e821d9bd32f"
      },
      {
        "measured_at": "2026-05-11T10:45:45.694134+00:00",
        "score": 1214.5931567686694,
        "source_record_id": "3483db1f-3d45-45f5-a8b0-818539ab1b64"
      }
    ],
    "median": null,
    "observed_max": 1214.5931567686694,
    "observed_min": 1199.2779189554856,
    "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": "3.1.2",
      "device_name": "AMD EPYC 9845 160-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "26.04",
      "driver": null,
      "num_cpu_cores": 160,
      "num_cpu_sockets": 1,
      "num_cpu_threads": 320,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "junkshop",
    "scene_checksum": "f5515a21a1337b908212d8d76733530df83014464a24c585ab7b96000da0cdce",
    "version": "5.1.1"
  },
  "condition_id": "a2e323aa213c20c1daec",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "b8ddf8d6-3360-454a-84e5-3e821d9bd32f",
    "3483db1f-3d45-45f5-a8b0-818539ab1b64"
  ],
  "measured_from": "2026-05-11T10:26:56.180649+00:00",
  "measured_to": "2026-05-11T10:45:45.694134+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9845",
  "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

5.1.1 · monster · CPU · Linux · Ubuntu · 26.04 · 1P · 160 cores · 320 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
1,445.77 / 1,460.07
Measurement dates
2026-05-11 – 2026-05-11
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": "2026-05-11T10:26:16.431395+00:00",
        "score": 1445.7656457129665,
        "source_record_id": "b8ddf8d6-3360-454a-84e5-3e821d9bd32f"
      },
      {
        "measured_at": "2026-05-11T10:45:04.609030+00:00",
        "score": 1460.072291615739,
        "source_record_id": "3483db1f-3d45-45f5-a8b0-818539ab1b64"
      }
    ],
    "median": null,
    "observed_max": 1460.072291615739,
    "observed_min": 1445.7656457129665,
    "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": "3.1.2",
      "device_name": "AMD EPYC 9845 160-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "26.04",
      "driver": null,
      "num_cpu_cores": 160,
      "num_cpu_sockets": 1,
      "num_cpu_threads": 320,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "monster",
    "scene_checksum": "8ff812a02f720433de1403dab447be9541eecca71cc919224a7790d017c1b2ce",
    "version": "5.1.1"
  },
  "condition_id": "e3fb6bcb3bbb553ae87c",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "b8ddf8d6-3360-454a-84e5-3e821d9bd32f",
    "3483db1f-3d45-45f5-a8b0-818539ab1b64"
  ],
  "measured_from": "2026-05-11T10:26:16.431395+00:00",
  "measured_to": "2026-05-11T10:45:04.609030+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9845",
  "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

5.1.1 · monster + junkshop + classroom · CPU · Linux · Ubuntu · 26.04 · 1P · 160 cores · 320 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
3,443.55 / 3,473.33
Measurement dates
2026-05-11 – 2026-05-11
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": "2026-05-11T10:27:30.025528+00:00",
        "score": 3443.5459026879325,
        "source_record_id": "b8ddf8d6-3360-454a-84e5-3e821d9bd32f"
      },
      {
        "measured_at": "2026-05-11T10:46:19.506697+00:00",
        "score": 3473.329335356382,
        "source_record_id": "3483db1f-3d45-45f5-a8b0-818539ab1b64"
      }
    ],
    "median": null,
    "observed_max": 3473.329335356382,
    "observed_min": 3443.5459026879325,
    "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": "3.1.2",
      "device_name": "AMD EPYC 9845 160-Core Processor",
      "dist_name": "Ubuntu",
      "dist_version": "26.04",
      "driver": null,
      "num_cpu_cores": 160,
      "num_cpu_sockets": 1,
      "num_cpu_threads": 320,
      "power_limit": null,
      "ram_bytes": null,
      "settings_status": "unknown",
      "system": "Linux"
    },
    "scene": "monster + junkshop + classroom",
    "scene_checksum": "c3453da9769193d968fb1cc675fd7f92a3424abe9ac730218f2e00b953389356",
    "version": "5.1.1"
  },
  "condition_id": "6be96050712218e3873d",
  "document_id": "blender-open-data-3b13b06e2e84b715",
  "example_record_ids": [
    "b8ddf8d6-3360-454a-84e5-3e821d9bd32f",
    "3483db1f-3d45-45f5-a8b0-818539ab1b64"
  ],
  "measured_from": "2026-05-11T10:27:30.025528+00:00",
  "measured_to": "2026-05-11T10:46:19.506697+00:00",
  "median": null,
  "parameter_id": "benchmark.blender.total_samples_per_minute",
  "population": "public submitted runs; not independent systems",
  "product_id": "amd-epyc-9845",
  "run_count": 2,
  "sample_status": "individual"
}
V-Ray (1)

V-Ray 6 (build unknown) v6-current-cpu

234,449 vsamples

Run count: 0 (aggregate / reported value)

View source ↗

{
  "comparison_readiness": "source-aggregate-only",
  "condition": {
    "benchmark": "V-Ray",
    "environment": {
      "backend": "CPU",
      "configuration": {
        "count": 1,
        "logicalCores": 320,
        "physicalCores": 160,
        "tag": "CpuDetails"
      },
      "evidence_type": "source-aggregate",
      "population": "Chaos public submitted runs; mixed systems",
      "scene_identity_status": "current public v6 scene; asset checksum unavailable",
      "settings_status": "unknown",
      "source_configuration_id": 25575,
      "source_device_name": "AMD EPYC 9845 160-Core Processor",
      "source_max": 253038,
      "source_median": 234449,
      "source_model_url": "https://benchmark.chaos.com/vray/v6/vray/25575",
      "source_sample_count": 2,
      "statistic": "mean"
    },
    "scene": "v6-current-cpu",
    "scene_checksum": "chaos-v6-current-workload:cpu",
    "version": "6 (build unknown)"
  },
  "condition_id": "b6fb48862fc04445cd6a",
  "document_id": "bench-d8bc2c1fda495d33-ab00e4dfb1469773",
  "example_record_ids": [
    "25575"
  ],
  "measured_from": null,
  "measured_to": null,
  "parameter_id": "benchmark.vray6_cpu",
  "population": "Chaos public submitted runs; mixed systems",
  "product_id": "amd-epyc-9845",
  "record_count": 1,
  "reported_value": 234449,
  "run_count": 0,
  "sample_status": "source-aggregate",
  "source_sample_count": 2,
  "statistic": "mean"
}

Sources

Source terms and retrieval dates are listed below. Published values and conditions may change.