| Product Description |
ASUS PRIME B550M-A AC – motherboard – micro ATX – Socket AM4 – AMD B550 |
| Product Type |
Motherboard – micro ATX |
| Chipset Type |
AMD B550 |
| Processor Socket |
Socket AM4 |
| Compatible Processors |
Ryzen (supports 3rd Generation Ryzen / 3rd Generation Ryzen with Radeon Graphics) |
| Max RAM Size |
128 GB |
| RAM Supported |
4 DIMM slots – DDR4, non-ECC, ECC, unbuffered |
| Storage Ports |
4 x SATA-600 (RAID), 2 x M.2 |
| USB / FireWire Ports |
2 x USB 3.2 Gen 2 + 4 x USB 3.2 Gen 1 + (2 x USB 3.2 Gen 1 + 4 x USB 2.0 via headers) |
| Audio |
HD Audio (8-channel) |
| LAN |
Gigabit Ethernet, 802.11a/b/g/n/ac, Bluetooth 5.0 |
| Max Processors Qty |
1 |
| Max Size |
128 GB |
| Technology |
DDR4 |
| Bus Clock |
2400 MHz, 2133 MHz, 2800 MHz, 3000 MHz, 2666 MHz, 2933 MHz, 3333 MHz (O.C.), 3466 MHz (O.C.), 3733 MHz (O.C.), 3600 MHz (O.C.), 3866 MHz (O.C.), 4000 MHz (O.C.), 4133 MHz (O.C.), 4400 MHz (O.C.), 4266 MHz (O.C.), 4600 MHz (O.C.), 3200 MHz |
| Supported RAM Integrity Check |
Non-ECC, ECC |
| Registered or Buffered |
Unbuffered |
| Features |
Dual channel memory architecture |
| Type |
HD Audio (8-channel) |
| Audio Codec |
Realtek ALC887 |
| Compliant Standards |
High Definition Audio |
| Network Controller |
Realtek RTL8111H |
| Network Interfaces |
Gigabit Ethernet, 802.11a/b/g/n/ac, Bluetooth 5.0 |
| Expansion Slots |
1 x CPU ¦ 4 x DIMM 288-pin ¦ 1 x PCIe 4.0 x16 (PCIe 4.0 x16 mode (with 3rd Generation Ryzen CPU); PCIe 3.0 x16 mode (with 3nd Generation Ryzen with Radeon Graphics CPU)) ¦ 2 x PCIe 3.0 x1 |
| Storage Interfaces |
SATA-600 -connectors: 4 x 7pin Serial ATA – RAID 0 / RAID 1 / RAID 10 ¦ SATA-600 / PCIe 4.0 -connectors: 1 x M.2 ¦ SATA-600 / PCIe 3.0 -connectors: 1 x M.2 |
| Interfaces |
1 x VGA ¦ 1 x DVI-D ¦ 1 x LAN (Gigabit Ethernet) ¦ 4 x USB 3.2 Gen 1 ¦ 2 x USB 3.2 Gen 2 ¦ 1 x audio line-in – mini-jack ¦ 1 x audio line-out – mini-jack ¦ 1 x microphone – mini-jack ¦ 1 x PS/2 keyboard / mouse ¦ 1 x HDMI |
| Internal Interfaces |
4 x USB 2.0 – header ¦ 2 x USB 3.2 Gen 1 – header ¦ 1 x SPDIF out – header ¦ 1 x audio – header ¦ 1 x serial – header ¦ 1 x speaker – header |
| Power Connectors |
24-pin main power connector, 8-pin ATX12V connector |
| BIOS Type |
AMI |
| BIOS Features |
UEFI BIOS, ASUS EZ Flash 3 |
| Sleep / Wake Up |
Wake on LAN (WOL) |
| Hardware Features |
Jack retasking, ASUS Q-Design, ASUS TurboV EVO, Q-DIMM, ASUS EZ DIY, Q-Slot, CrashFree BIOS 3, audio jack detect technology, ASUS EPU (Energy Processing Unit), ASUS DIGI+ VRM, Preboot eXecution Environment (PXE), ASUS Stainless Steel Back I/O, ASUS Fan Xpert 2+, LANGuard, ASUS Overvoltage Protection, Lighting Control, ASUS 5X Protection III, ASUS SafeSlot Core, ASUS Aura Sync, Armoury Crate |
| Included Accessories |
1 x M.2 screw, I/O back cover, ASUS Wi-Fi moving antenna |
| Cables Included |
2 x Serial ATA cable |
| Software Included |
Drivers & utilities, ASUS AI Charger, ASUS CPU-Z, ASUS AI Suite III, ASUS EZ Update, DAEMON Tools, WinRAR, Norton AntiVirus (60 days trial) |
| Width |
9.6 in |
| Depth |
9.6 in |
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