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P51083-B21

Riser

HPE ProLiant DL380 2U x16/x16/x16 Secondary Riser Kit

Verified in 2 active model(s): HPE ProLiant DL380 Gen12, HPE ProLiant DL380 Gen11

Documentation of this part

Verified documentation; every sentence refers to an official HPE document (press [number] to see the quote).

What it is

  • P51083-B21 is the HPE ProLiant DL380 2U x16/x16/x16 Secondary Riser Kit.

Why this part number

  • The P51083-B21 secondary riser provides Slot 4, Slot 5 and Slot 6, each with PCIe 5.0 technology and the note Proc 2.

Features

  • Slot 4: PCIe 5.0, Bus Width X16, Connector Width X16, full-height, full-length slot, Proc 2.
  • Slot 5: PCIe 5.0, Bus Width X16, Connector Width X16, full-height, full-length slot, Proc 2.
  • Slot 6: PCIe 5.0, Bus Width X16, Connector Width X16, full-height, half-length slot, Proc 2.

Official notes

  • Up to one Secondary Riser can be selected per server.
  • Two Secondary Riser types are supported.
  • *If the HPE DL380 Gen12 x16/x16/x16 Cable Kit (P76471-B21) is not selected: Only Slot 5 and Slot 6 are available. Slot 4 is disabled (no PCIe card support).
  • ** To enable Slot 4: Select Qty 2 × P76471-B21 (HPE DL380 Gen12 x16/x16/x16 Cable Kit), and Select trigger SKU P78120-B21.
  • *** Factory Bundle behavior (Slot 4 bandwidth): For the following bundle kits: P77961-B21 (HPE DL380 Gen12 24SFF x2 Direct Attach x16/x16/x16 OCP FIO Bundle Kit). P77946-B21 (HPE DL380 Gen12 12EDSFF Direct Attach x16/x16/x16 OCP FIO Bundle Kit). Slot 4 operates at x8 (not x16).
  • After completing your Smart Chassis configuration, set the Smart Chassis quantity to 1. OCA will automatically select the required cables, which will appear under Storage Devices (Step 5) > Internal Storage Controller Cables.
  • No manual cable selection is required.
  • Refer to the PCIe Expansion Slot section above for detailed Riser card and accessory selection guidance.
  • Review the PCIe Expansion Slots section for slot numbering, bus width, processor requirements, and riser configuration details.
  • A second processor is required when selecting a secondary or tertiary riser.
  • The 3x16 secondary riser and tertiary riser cannot be selected together.

Compatibility & limits

  • The 3x16 secondary riser and tertiary riser cannot be selected together.
  • A second processor is required when selecting a secondary or tertiary riser.
  • Up to one Secondary Riser can be selected per server.

How it differs

  • P51083-B21 is the DL380 2U x16/x16/x16 Secondary Riser Kit, while P48802-B21 is the DL380 Gen11 2U x8/x16/x8 Secondary Riser Kit.

Description

Secondary riser

The secondary riser provides extra PCIe slots, usually connected to the second processor.

It is needed to install more cards or double-wide GPUs on the second side of the chassis.

The number of installable expansion cards increases.

This text is the general explanation of this category of part (not a claim about one specific model).

Attributes (extracted from the official description)

Slots
3
Lanes
x16/x16/x16

Compatibility map

The relations of this part with other parts, from the audited QuickSpecs rules and the compatibility graph only (every line with its official source).

P51083-B21P48826-B21P51095-B21P48804-B21P78120-B21P47777-B21P47785-B21P47184-B21804398-B21S2L70CP53639-B21P53635-B21P53638-B21P74737-B21P76451-B21

Click a part or a relation line (or press Enter) to pin its explanation and source; Esc releases it. Drag to pan the map or use the arrow keys; zoom with the buttons, the + and − keys or Ctrl with the mouse wheel. 7 more related part(s) were left off the map for legibility; the rule list on this page is more complete.

Hover or click a part or a relation to show its recorded rule and official source.

  • Incompatible: ⁦P48826-B21⁩ and ⁦P51083-B21⁩ are incompatible. با قفسه ⁦2LFF Tertiary⁩، رایزر ⁦Secondary⁩ و ⁦Tertiary⁩ قابل انتخاب نیست. (⁦FA⁩)
  • Incompatible: ⁦P51083-B21⁩ and ⁦P51095-B21⁩ are incompatible. با قفسه ⁦2LFF Secondary⁩، رایزر ⁦Secondary⁩ قابل انتخاب نیست. (⁦FA⁩)
  • Incompatible: ⁦P48804-B21⁩ and ⁦P51083-B21⁩ are incompatible. رایزر ⁦Tertiary⁩ و رایزر ⁦Secondary x16/x16/x16⁩ همزمان قابل انتخاب نیستند. (⁦FA⁩)
  • Requires: ⁦P78120-B21⁩ requires ⁦P51083-B21⁩. کیت ⁦P78120-B21⁩ اسلات ⁦4⁩ رایزر ثانویه ⁦3x16⁩ (⁦P51083-B21⁩) را فعال می‌کند و به آن نیاز دارد. (⁦FA⁩)
  • Requires: ⁦P47777-B21⁩ requires ⁦P51083-B21⁩. با دو کنترلر ⁦PCIe⁩ (نوع -⁦p⁩) یا بیشتر، انتخاب رایزر ثانویه (⁦P51083-B21⁩، ⁦P48802-B21⁩ یا ⁦P48806-B21⁩) الزامی است. (⁦FA⁩)
  • Requires: ⁦P47785-B21⁩ requires ⁦P51083-B21⁩. با دو کنترلر ⁦PCIe⁩ (نوع -⁦p⁩) یا بیشتر، انتخاب رایزر ثانویه (⁦P51083-B21⁩، ⁦P48802-B21⁩ یا ⁦P48806-B21⁩) الزامی است. (⁦FA⁩)
  • Requires: ⁦P47184-B21⁩ requires ⁦P51083-B21⁩. با دو کنترلر ⁦PCIe⁩ (نوع -⁦p⁩) یا بیشتر، انتخاب رایزر ثانویه (⁦P51083-B21⁩، ⁦P48802-B21⁩ یا ⁦P48806-B21⁩) الزامی است. (⁦FA⁩)
  • Requires: ⁦804398-B21⁩ requires ⁦P51083-B21⁩. با دو کنترلر ⁦PCIe⁩ (نوع -⁦p⁩) یا بیشتر، انتخاب رایزر ثانویه (⁦P51083-B21⁩، ⁦P48802-B21⁩ یا ⁦P48806-B21⁩) الزامی است. (⁦FA⁩)
  • Requires: S2L70C requires ⁦P51083-B21⁩. برای ⁦GPU⁩ مدل ⁦L40S⁩ دست‌کم یک رایزر ثانویه یا ثالثیه لازم است (با دو ⁦GPU⁩ هر دو رایزر؛ رایزرهای ⁦NEBS⁩ با ⁦GPU⁩ سازگار نیستند). (⁦FA⁩)
  • Requires: S2L70C requires ⁦P51083-B21⁩. با دو ⁦GPU⁩ مدل ⁦L40S⁩ رایزر ثانویه و رایزر ثالثیه هر دو لازم است (رایزر ثانویه). (⁦FA⁩)
  • Requires: ⁦P53639-B21⁩ requires ⁦P51083-B21⁩. بسته ⁦32NVMe⁩ نیازمند رایزر ⁦Secondary 3x16⁩ (⁦P51083-B21⁩) است. (⁦FA⁩)
  • Requires: ⁦P53635-B21⁩ requires ⁦P51083-B21⁩. بسته ⁦24NVMe Balanced⁩ نیازمند رایزر ⁦Secondary 3x16⁩ (⁦P51083-B21⁩) است. (⁦FA⁩)
  • Requires: ⁦P53638-B21⁩ requires ⁦P51083-B21⁩. بسته ⁦24NVMe Diff IO-3⁩ نیازمند رایزر ⁦Secondary⁩ است؛ سند آن را «⁦x8x16x8⁩» با شماره ⁦P51083-B21⁩ می‌نامد، بنابراین هر یک از ⁦P51083-B21⁩ (⁦x16/x16/x16⁩) یا ⁦P48802-B21⁩ (⁦x8/x16/x8⁩) پذیرفته می‌شود. (⁦FA⁩)
  • Incompatible: ⁦P51083-B21⁩ and ⁦P74737-B21⁩ are incompatible. رایزر ثانویه ⁦3x16⁩ و رایزر ثالثی را نمی‌توان با هم انتخاب کرد. (⁦FA⁩)
  • Incompatible: ⁦P51083-B21⁩ and ⁦P76451-B21⁩ are incompatible. رایزر ثانویه ⁦3x16⁩ و رایزر ثالثی را نمی‌توان با هم انتخاب کرد. (⁦FA⁩)

Active models in which this part is listed

HPE ProLiant DL380 Gen12

step «Risers and PCIe/OCP expansion»Add to this model's configuration

Related rules (5)

  • IncompatibilityThis part is one side of an incompatibility

    رایزر ثانویه ⁦3x16⁩ و رایزر ثالثی را نمی‌توان با هم انتخاب کرد. (⁦FA⁩)

    Source: a00073551enw — page 16
    HPE ProLiant Compute DL380 Gen12
    “HPE ProLiant Compute DL380 Gen12 QuickSpecs” — a00073551enw · Version 20 — page 16View documentVendor siteSearch this document
    The 3x16 secondary riser and tertiary riser cannot be selected together.
  • RecommendationThe rule applies only when this part is selected

    بدون دو عدد کیت کابل ⁦P76471-B21⁩ اسلات ⁦4⁩ روی رایزر ثانویه ⁦3x16⁩ غیرفعال است (فقط اسلات ⁦5⁩ و ⁦6⁩ در دسترس). (⁦FA⁩)

    Source: a00073551enw — page 17
    HPE ProLiant Compute DL380 Gen12
    “HPE ProLiant Compute DL380 Gen12 QuickSpecs” — a00073551enw · Version 20 — page 17View documentVendor siteSearch this document
    *If the HPE DL380 Gen12 x16/x16/x16 Cable Kit (P76471-B21) is not selected: Only Slot 5 and Slot 6 are available.
  • RequirementThis part can satisfy the requirement of the rule

    کیت ⁦P78120-B21⁩ اسلات ⁦4⁩ رایزر ثانویه ⁦3x16⁩ (⁦P51083-B21⁩) را فعال می‌کند و به آن نیاز دارد. (⁦FA⁩)

    Parts on the other side: P78120-B21

    Source: a00073551enw — page 44
    HPE ProLiant Compute DL380 Gen12
    “HPE ProLiant Compute DL380 Gen12 QuickSpecs” — a00073551enw · Version 20 — page 44View documentVendor siteSearch this document
    Factory Integrated Only bundle used with Qty 2 of P76471-B21 to enable Slot 4 on the 3x16 secondary riser at x16 from processor 2.
  • RequirementA general rule that covers this part through its attributes

    ماژول ⁦P74208⁩ به رایزر ثانویه نیاز دارد. (⁦FA⁩)

    Parts on the other side: P74208-B21

    Source: a00073551enw — page 33
    HPE ProLiant Compute DL380 Gen12
    “HPE ProLiant Compute DL380 Gen12 QuickSpecs” — a00073551enw · Version 20 — page 33View documentVendor siteSearch this document
    Requires a Secondary Riser Kit.
  • RequirementA general rule that covers this part through its attributes

    انتخاب رایزر ثانویه یا ثالثی نیازمند پردازنده دوم است. (⁦FA⁩)

    Source: a00073551enw — page 16
    HPE ProLiant Compute DL380 Gen12
    “HPE ProLiant Compute DL380 Gen12 QuickSpecs” — a00073551enw · Version 20 — page 16View documentVendor siteSearch this document
    A second processor is required when selecting a secondary or tertiary riser.

HPE ProLiant DL380 Gen11

step «Risers and PCIe expansion»Add to this model's configuration

Related rules (12)

  • IncompatibilityThis part is one side of an incompatibility

    با قفسه ⁦2LFF Tertiary⁩، رایزر ⁦Secondary⁩ و ⁦Tertiary⁩ قابل انتخاب نیست. (⁦FA⁩)

    Parts on the other side: P48826-B21

    Source: a50004307enw — page 60
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 60View documentVendor siteSearch this document
    When 2LFF Tertiary Cage is selected then Secondary and Tertiary Riser cannot be selected.
  • IncompatibilityThis part is one side of an incompatibility

    با قفسه ⁦2LFF Secondary⁩، رایزر ⁦Secondary⁩ قابل انتخاب نیست. (⁦FA⁩)

    Parts on the other side: P51095-B21

    Source: a50004307enw — page 60
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 60View documentVendor siteSearch this document
    When 2LFF Secondary Cage is selected then Secondary Riser cannot be selected.
  • RequirementThis part can satisfy the requirement of the rule

    با دو کنترلر ⁦PCIe⁩ (نوع -⁦p⁩) یا بیشتر، انتخاب رایزر ثانویه (⁦P51083-B21⁩، ⁦P48802-B21⁩ یا ⁦P48806-B21⁩) الزامی است. (⁦FA⁩)

    Parts on the other side: P47777-B21P47785-B21P47184-B21804398-B21

    Source: a50004307enw — page 19
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 19View documentVendor siteSearch this document
    If second controller is required, you must select secondary riser.
  • RequirementThis part can satisfy the requirement of the rule

    برای ⁦GPU⁩ مدل ⁦L40S⁩ دست‌کم یک رایزر ثانویه یا ثالثیه لازم است (با دو ⁦GPU⁩ هر دو رایزر؛ رایزرهای ⁦NEBS⁩ با ⁦GPU⁩ سازگار نیستند). (⁦FA⁩)

    Parts on the other side: S2L70C

    Source: a50004307enw — page 65
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 65View documentVendor siteSearch this document
    If Qty1 of this GPU is selected then Secondary OR Tertiary Riser Must be selected. If Qty2 of this GPU is selected then Secondary AND Tertiary Riser Must be selected.
  • RequirementThis part is the condition of the rule

    رایزر ثانویه یا ثالثیه نیازمند پردازنده دوم است. (⁦FA⁩)

    Source: a50004307enw — page 60
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 60View documentVendor siteSearch this document
    If Secondary OR Tertiary Riser is selected, then Second Processor must be selected.
    Source: a50004307enw — page 60
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 60View documentVendor siteSearch this document
    For a Secondary/Tertiary riser, the second processor is required.
  • IncompatibilityThis part is one side of an incompatibility

    رایزر ⁦Tertiary⁩ و رایزر ⁦Secondary x16/x16/x16⁩ همزمان قابل انتخاب نیستند. (⁦FA⁩)

    Parts on the other side: P48804-B21

    Source: a50004307enw — page 60
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 60View documentVendor siteSearch this document
    Tertiary Riser and Secondary 3 x16 Riser cannot be selected together.
  • RecommendationThe rule applies only when this part is selected

    برای فعال‌سازی اسلات ۴ رایزر ⁦Secondary 3x16⁩ کیت کابل ⁦P56074-B21⁩ لازم است. (⁦FA⁩)

    Source: a50004307enw — page 60
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 60View documentVendor siteSearch this document
    If Slot 4 of HPE ProLiant DL380 Gen11 2U 3x16 Secondary Riser Kit needs to be enabled then 3 x16 Secondary Cable Kit (P56074-B21) must be selected.
  • RequirementThis part can satisfy the requirement of the rule

    بسته ⁦32NVMe⁩ نیازمند رایزر ⁦Secondary 3x16⁩ (⁦P51083-B21⁩) است. (⁦FA⁩)

    Parts on the other side: P53639-B21

    Source: a50004307enw — page 44
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 44View documentVendor siteSearch this document
    If 24NVMe Bundle/ 32NVMe Bundle is selected then Qty 1 of HPE ProLiant DL380 Gen11 3x16 SEC Riser must be selected.
  • RequirementThis part can satisfy the requirement of the rule

    بسته ⁦24NVMe Balanced⁩ نیازمند رایزر ⁦Secondary 3x16⁩ (⁦P51083-B21⁩) است. (⁦FA⁩)

    Parts on the other side: P53635-B21

    Source: a50004307enw — page 45
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 45View documentVendor siteSearch this document
    If 24NVMe Bundle is selected, then Qty 1 of HPE ProLiant DL380 2U 3x16 Secondary Riser (P51083-B21) must be selected and defaulted.
  • RequirementThis part can satisfy the requirement of the rule

    بسته ⁦24NVMe Diff IO-3⁩ نیازمند رایزر ⁦Secondary⁩ است؛ سند آن را «⁦x8x16x8⁩» با شماره ⁦P51083-B21⁩ می‌نامد، بنابراین هر یک از ⁦P51083-B21⁩ (⁦x16/x16/x16⁩) یا ⁦P48802-B21⁩ (⁦x8/x16/x8⁩) پذیرفته می‌شود. (⁦FA⁩)

    Parts on the other side: P53638-B21

    Source: a50004307enw — page 47
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 47View documentVendor siteSearch this document
    If 24NVMe Bundle is selected, then Qty 1 of HPE ProLiant DL380 Gen11 x8x16x8 Secondary Riser (P51083-B21) must be selected and defaulted.
    Source: a50004307enw — page 45
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 45View documentVendor siteSearch this document
    If 24NVMe Bundle is selected then Qty 1 of HPE ProLiant DL380 Gen11 x8x16x8 Secondary Riser must be selected and defaulted.
  • RequirementThis part can satisfy the requirement of the rule

    با دو ⁦GPU⁩ مدل ⁦L40S⁩ رایزر ثانویه و رایزر ثالثیه هر دو لازم است (رایزر ثانویه). (⁦FA⁩)

    Parts on the other side: S2L70C

    Source: a50004307enw — page 65
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 65View documentVendor siteSearch this document
    If Qty1 of this GPU is selected then Secondary OR Tertiary Riser Must be selected. If Qty2 of this GPU is selected then Secondary AND Tertiary Riser Must be selected.
  • Maximum quantityThe rule limits this part

    One riser per riser position (riser table p61): at most one Secondary-position riser.

    Source: a50004307enw — page 61
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 61View documentVendor siteSearch this document
    Part number Description Riser position Bus width (Gen5 lanes)
    Source: a50004307enw — page 61
    HPE ProLiant DL380 Gen11
    “HPE ProLiant DL380 Gen11 QuickSpecs” — a50004307enw · Version 47 — page 61View documentVendor siteSearch this document
    P51083-B21 HPE DL380 Gen11 x16/x16/x16 N O N x16 x16 x16

Official notes (verbatim QuickSpecs text)

  • Slot 4 - PCIe 5.0 x16 Full Height and Full Length.
  • Slot 5 - PCIe 5.0 x16 Full Height and Full Length.
  • Slot 6 - PCIe 5.0 x16 Full Height and Half Length.
  • When 2LFF Tertiary Cage is selected then Secondary and Tertiary Riser cannot be selected.
  • When 2LFF Secondary Cage is selected then Secondary Riser cannot be selected.
  • If 24NVMe Bundle is selected, then Qty 1 of HPE ProLiant DL380 Gen11 3x16 SEC Riser must be selected and defaulted.
  • If Slot 4 of HPE ProLiant DL380 Gen11 2U 3x16 Secondary Riser Kit needs to be enabled then 3 x16 Secondary Cable Kit (P56074-B21) must be selected.
  • If Secondary 3 x16 Cable Kit is NOT selected, then only Slot 5 and Slot 6 will be available and no PCIe cards can be selected for Slot4.
  • If Secondary OR Tertiary Riser is selected, then Second Processor must be selected.
  • Tertiary Riser and Secondary 3 x16 Riser cannot be selected together.

Verification and sources

PartSurfer status: Matches PartSurfer

PartSurfer: HPE PROLIANT DL380 2U X16/X16/X16 SECONDARY RISER KIT

Document row: a00073551enw — page 44
HPE ProLiant Compute DL380 Gen12
“HPE ProLiant Compute DL380 Gen12 QuickSpecs” — a00073551enw · Version 20 — page 44View documentVendor siteSearch this document
HPE ProLiant DL380 2U x16/x16/x16 Secondary Riser Kit P51083-B21

This page contains only the audited data of the official vendor documents (HPE, Lenovo, Dell) for the active models. Price and availability are given through the quote request in the configurator.