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Rectangular ATX motherboard with black PCB, silver heatsinks and rear I/O shield visible

ASUS

ASUS PRIME B550-PLUS AC-HES AMD motherboard

SKU CH-E4MA-7WRGQ MPN PRIME B550-PLUS AC-HES

ATX board for AM4 Ryzen CPUs with dual M.2 slots, PCIe 4.0 support, WIFI 5 and 1 Gb Ethernet

  • ProcessorRyzen 3000 Series / Ryzen 4000G Series / Ryzen 5000 Series /
  • ChipsetAMD B550
  • Form factorATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memoryDDR4 4866(OC) / 4800(OC) / 4600(OC) / 4466(OC) / 4400(OC) /

Model PRIME B550-PLUS AC-HES

  • AM4 socket pairs with Ryzen 5000 and 3000 CPUs for PCIe 4.0 graphics bandwidth
  • Dual M.2 slots accept 2242 2260 2280 22110 drives with PCIe 4.0 x4 or SATA modes
  • 8+1 DrMOS power stages with alloy chokes and durable capacitors deliver stable current to high core count CPUs
  • WiFi 5 and 1 Gb Ethernet plus rear USB 3.2 Gen 2 Type-A and Type-C keep data moving
  • 128 GB DDR4 across four slots with XMP 2.0 support and ECC compatibility for heavy workloads

Socket AM4 Foundation

The ASUS PRIME B550-PLUS AC-HES is an ATX motherboard built for AMD Ryzen 3000, 4000G, 5000 and 5000G series processors. It delivers PCIe 4.0 graphics and storage support when paired with Ryzen 3000 or 5000 series CPUs. Integrated WIFI 5 and 1 Gb Ethernet provide network connectivity out of the box.

Builders and Upgraders

This board suits builders who need dual M.2 slots, six SATA ports, rear USB 3.2 Gen 2 Type-C and front-panel USB 3.2 Gen 1 Type-C headers. Users requiring more than 1 Gb Ethernet or additional PCIe 4.0 lanes from the chipset should consider other chipsets.

Primary M.2 Slot

The top M.2 socket accepts 2242, 2260, 2280 and 22110 drives and runs at PCIe 4.0 x4 with Ryzen 3000 or 5000 series CPUs, dropping to PCIe 3.0 x4 with Ryzen 4000G or 5000G series. This single specification determines whether your SSD achieves its rated throughput.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $93.99
Cheaper than about 78% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Model namePRIME B550-PLUS AC-HES
Part numberPRIME B550-PLUS AC-HES
Processor
ProcessorRyzen 3000 Series / Ryzen 4000G Series / Ryzen 5000 Series / Ryzen 5000G Series
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryDDR4 4866(OC) / 4800(OC) / 4600(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3400(OC) / 3333(OC) / 3200 / 3000 / 2933 / 2800 / 2666 / 2400 / 2133
Max supported RAM128 GB
Memory channelsDual Channel
Memory profilesIntel XMP 2.0
ECC supportYes
BufferingUn-buffered
Storage
SATA ports6 x SATA 6Gb/s
SATA and RAID support0/1/10
Audio & video
Sound channelsRealtek ALC897/887 7.1 Surround Sound High Definition Audio CODEC
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback
Audio Features
- Audio Shielding
- Rear optical S/PDIF out port
- Premium Japanese audio capacitors
- Dedicated audio PCB layers
- Unique de-pop circuit
Connectivity
Maximum network speed1 Gbit/s
Wi-Fi standardWi-Fi 802.11 ac
Bluetooth support5.0
Ports & slots
Onboard USB headers1 x USB 3.2 Gen 1 connector (supports USB Type-C)
1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
1 × 8-pin +12 V Power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Shipping weight1.27 kg
Package size356 × 267 × 64 mm
Compatibility
Windows 11 supportSupported

Other versions of this model

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Questions about this item

How do I install the ASUS PRIME B550-PLUS AC-HES into an ATX case, and which standoff step do builders often miss?

Align the board's nine mounting holes with the case standoffs, fasten all screws, then connect the 24-pin ATX and 8-pin EPS power cables before adding any expansion cards.

What maintenance will the ASUS PRIME B550-PLUS AC-HES need over its lifetime?

Clean dust from the VRM heatsink, PCH heatsink, and fan headers every few months using compressed air; check that all fan cables stay seated in the hybrid headers so Fan Xpert 2 can regulate speeds.

What limit appears first on the ASUS PRIME B550-PLUS AC-HES during sustained heavy loads?

The 8+1 DrMOS power stages and alloy chokes set the practical ceiling for CPU current delivery; if VRM temperatures rise, Fan Xpert 2 will spin the hybrid headers faster to protect the capacitors.

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