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ASUS / D079

ASUS PRIME B550-PLUS AC-HES — selected storage and PCIe slots

An exact motherboard example: two M-key slots have CPU/chipset-dependent modes; M.2_2 shares resources with SATA6G_56, and physical x16 does not guarantee sixteen wired lanes.

Explore this device’s exact port groups →

Exact scope

PRIME B550-PLUS AC-HES only; E18712 First Edition July 2021, selected internal groups

Four selected internal port groups from E18712, printed vi–vii and layout 1-2; not a complete motherboard inventory.

Source checked · human review pending

Checked 2026-10-08 · Review due 2027-01-06
Sources S429

Inspect the evidence → (private workspace)

Same connector form, different documented roles

P030: M.2_1 (Key M) — CPU-dependent PCIe x4 or SATA · M.2_2 (Key M) — Chipset PCIe 3.0 x4 or SATA

Do not transfer a capability from one location to another merely because the connector outline matches.

Location and role matter

Selected port groups

4 groups · not an exhaustive parts diagram

Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.

M.2 card edge interface — original, not-to-scale identification schematic; drawing review pending× 1
CPU dependent PCIe x4 or SATA

M.2_1 (Key M)

The manual lists 2242/2260/2280/22110. Named Ryzen 5000/3000 desktop families use PCIe 4.0 x4; named 5000 G-Series/4000 G-Series families use PCIe 3.0 x4; SATA mode is also listed. Verify the exact CPU and firmware.

Sources S429 · Connector field note

Identification only. This port group cannot launch the scoped planner.

M.2 card edge interface — original, not-to-scale identification schematic; drawing review pending× 1
Chipset PCIe 3.0 x4 or SATA

M.2_2 (Key M)

The manual lists 2242/2260/2280/22110 and PCIe 3.0 x4/SATA. Populating M.2_2 disables SATA6G_56; the note is not restricted to SATA-mode modules.

Sources S429 · Connector field note

Identification only. This port group cannot launch the scoped planner.

× 1
Physical x16, x4 mode with a population condition

PCIEX16_4 / PCIe 3.0 x16_4

The specification summary lists x4 mode, falling to x1 if any of x16_2, x16_3 or x16_5 is occupied. The layout uses PCIEX16_4. This is not the CPU-connected x16 slot.

Sources S429 · Connector field note

Identification only. This port group cannot launch the scoped planner.

× 2
SATA; unavailable when M.2_2 is populated

SATA6G_56 (ports 5 and 6)

Only this selected pair is documented here. The exact manual says the pair is disabled when M.2_2 is populated; this is not a universal SATA or M.2 rule.

Sources S429 · Connector field note

Identification only. This port group cannot launch the scoped planner.

Read before using the profile

  • This profile is not the similarly named PRIME B550-PLUS without the AC-HES suffix.
  • Selected internal groups only: other PCIe slots, SATA ports, power, USB, display, audio and network connectors are not inventoried here.
  • The manual’s processor-family conditions are retained; no current BIOS, boot qualification, actual throughput, compatibility approval or hardware testing is claimed.
  • Storage groups are informational and do not prefill a USB/display planner. Power off and follow the exact motherboard and drive service instructions.

Exact-model source trail

Sources behind this profile

These are the profile’s existing source records, with their original scope and access limitations. No new inspection or approval is implied.

S429Full source record →

ASUS · PRIME B550-PLUS AC-HES User’s Manual

Selected storage and PCIe slot roles for PRIME B550-PLUS AC-HES only, with CPU, slot population and SATA-sharing conditions.

Open source ↗

Locator: E18712, First Edition, July 2021; specification summary printed vi–vii and layout 1-2. PDF pages 2, 6, 7 and 12 visually inspected.
Access: public pdf text. Not the ordinary PRIME B550-PLUS or every B550 motherboard. Selected internal groups only; no current BIOS verification, boot qualification, entire port inventory or hardware test. Manual conditions must not be generalized.

Related field notes

M.2 card edge interfaceM.2 is a form-factor family; NVMe describes a different layer. →M.2 versus NVMe: different categoriesCheck the slot specification, not just the notch. →SATA 7-pin data connectorA data connector is not a power connector. →PCI Express x16 164-position card-edge connectorThe x16 mechanical form does not by itself establish PCIe generation, active lane width, power budget or platform support. →Mini PCI Express / mSATA 52-position socketThe shared 52-position socket family does not make Mini PCIe and mSATA electrically interchangeable; host implementation still controls supported signals. →
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Exact-model evidence map

What this release can actually tell you about ASUS PRIME B550-PLUS AC-HES — selected storage and PCIe slots.

0 of 6 task domains contain some exact-model evidence. The others stay explicitly undocumented.

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Displays & docksNot documented here

No displays & docks-specific evidence for this exact model is represented in this release.

Plan next step →Topology →
USB dataNot documented here

No usb data-specific evidence for this exact model is represented in this release.

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Memory cards & readersNot documented here

No memory cards & readers-specific evidence for this exact model is represented in this release.

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Ethernet & PoENot documented here

No ethernet & poe-specific evidence for this exact model is represented in this release.

Plan next step →Topology →
AudioNot documented here

No audio-specific evidence for this exact model is represented in this release.

Plan next step →Topology →
Charging & powerNot documented here

No charging & power-specific evidence for this exact model is represented in this release.

Plan next step →Topology →

Derived from the existing device profile and domain catalogs. This layer adds no new hardware fact and does not infer compatibility from a missing or present cell.

Evidence behind this page

Scope first. Source second. Approval separate.

1 linked sources · 0 scoped claims · 0 sources with inspection/access flags.

Page scope: PRIME B550-PLUS AC-HES only; E18712 First Edition July 2021, selected internal groups

Assessment 2026-10-22 · earliest scheduled source review 2027-01-06. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 1 source scopes, access limits and dates

S429 · PRIME B550-PLUS AC-HES User’s Manual

ASUS · Manufacturer / product-owner domain · inspected 2026-10-08 · due 2027-01-06

Within inspection window

Scoped support: Selected storage and PCIe slot roles for PRIME B550-PLUS AC-HES only, with CPU, slot population and SATA-sharing conditions.

Not established / limitations: Not the ordinary PRIME B550-PLUS or every B550 motherboard. Selected internal groups only; no current BIOS verification, boot qualification, entire port inventory or hardware test. Manual conditions must not be generalized.

Locator: E18712, First Edition, July 2021; specification summary printed vi–vii and layout 1-2. PDF pages 2, 6, 7 and 12 visually inspected.

Trace 0 claims to their source records

No central claims on this surface. Exact-device assertions and explicit source links remain in the original profile above and in the reviewer packet.

Prepare this page for review → (private workspace)Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.