ASUS PRIME B550M-K AM4 AMD B550 USB 3.0 HDMI Micro ATX AMD Motherboard
- $378.81
- Free Shipping from Hong Kong
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Seller
right8 Reviews (100% Positive)
Reviews(1,866)
- No active cooler fans like the X570 boards! Fans are a point of failure so recommend B550 unless you are doing something crazy with PCIe gen 4 lanes
- Plenty of fan headers all over the board (they are not clustered all in one place like some boards out there)
- BIOS flashback is very useful if you are planning to install a Ryzen 5000 series CPU
- Sound chip and ASUS software actually makes my audio better (did not buy the board for this feature but was really impressed by the sound quality)
- Aura RGB works, nice ROG logo LED touch
- ASUS BIOS is easy to use and plenty of support out there. There are plenty of people with ASUS boards out there and you can usually find a forum or reddit post on just about anything you want to know about this board.
- Only 6 SATA ports and limited to 4 if you use the 2nd M.2 slot (but this is common for most B550 boards).
- VRM heatsinks are tall, plan accordingly if you have a tight case and trying to cram in a radiator at the top
- ARGB header is in the bottom center. May be challenging to connect RGB fans from the top of the case and with ASUS put another ARGB header on the board near the top (there is a regular RGB one but not ARGB)
Would recommend for anyone looking for a quality B550 board. ASUS has been my go to for the last 4 builds and has never let me down. This is the first time I went for the ROG line and I am very impressed! The most under rated feature is the sound chip. I can't believe it but gaming actually sounds better with the same speakers. And I was coming from an ASUS P8Z77. Aura sync works like a charm, every other RGB product I've plug in is plug and play when it comes to LEDs (using Trident Z RGB RAM and Fractal Design AL-14 fans).
Top the line hardware with no complaints.
Bios-level software that auto-installs when you first install windows. Armory Crate caused hangs, crashes, and hiccups while playing intensive 3D apps. Trying to uninstall it traditionally will get you nowhere.
This is a perfectly fine motherboard with the exception that it stores BLOATWARE onboard and installs it at the bios-level. Only through the bios can you turn it off.
Unacceptable, Asus. Stuff your stupid launcher.
Warranty & Returns
Warranty
Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
Return Policies
Return for refund within: 30 days
Return for replacement within: 90 days
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Features & Details
- AMD B550
- BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU
- 3rd Gen AMD Ryzen Processors
- DDR4 4600(O.C)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory
- Next Generation AMD Ryzen PRO Processors
- DDR4 4800(O.C.)/ 4600(O.C)/ 4466(O.C.)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory
- ECC Memory (ECC mode) support varies by CPU.
Specifications
| Brand | ASUS |
|---|---|
| Model | PRIME B550M-K |
| CPU Socket Type | AM4 |
|---|---|
| CPU Type | BIOS update might require for AMD Zen 3 Ryzen 5000 series CPU. Refer to ASUS website for CPU support list. |
| Chipset | AMD B550 |
|---|
| Number of Memory Slots | 4x288pin (DDR4) |
|---|---|
| Memory Standard | 3rd Gen AMD Ryzen Processors DDR4 4600(O.C)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory * Next Generation AMD Ryzen PRO Processors DDR4 4800(O.C.)/ 4600(O.C)/ 4466(O.C.)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory * ECC Memory (ECC mode) support varies by CPU. * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists). |
| Maximum Memory Supported | 128GB |
| Channel Supported | Dual Channel |
| PCI Express 4.0 x16 | 3rd Gen AMD Ryzen Processors 1 x PCIe 4.0 x16 (x16 mode) |
|---|---|
| PCI Express 3.0 x16 | 1 x PCI Express 3.0 x16 |
| PCI Express x16 | None |
| PCI Express x1 | AMD B550 Chipset 2 x PCIe 3.0 x1 |
| Serial ATA (SATA) | 4 x SATA 6Gb/s |
|---|---|
| M.2 | 3rd Gen AMD Ryzen Processors: 1 x M.2 Socket 3, with M Key, Type 2242/2260/2280/22110 (PCIE 4.0 x4 and SATA modes) storage devices support AMD B550 Chipset: 1 x M.2 Socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support |
| SATA RAID | 0/1/10 |
| Onboard Video Chipset | Supported only by CPU with integrated graphic: 1 x D-Sub 1 x DVI-D 1 x HDMI 2.1(4K@60HZ) |
|---|
| Audio Chipset | Realtek ALC887 |
|---|---|
| Audio Channels | 7.1 Channels |
| LAN Chipset | Realtek RTL8111H |
|---|---|
| Max LAN Speed | 1Gbps |
| Back I/O Ports | 1 x PS/2 keyboard/mouse combo port(s) 1 x DVI-D 1 x D-Sub 1 x HDMI 1 x LAN (RJ45) port(s) 2 x USB 3.2 Gen 2 (teal blue) (2 x Type-A) 4 x USB 3.2 Gen 1 (blue) Type-A 3 x Audio jack(s) |
|---|---|
| HDMI | 1 x HDMI |
| USB 3.0 | 2 x USB 3.0 |
| Onboard USB | 1 x USB 3.2 Gen 1 (up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s) 2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s) |
|---|---|
| Other Connectors | 1 x CPU Fan connector(s) 2 x Chassis Fan connector(s) 1 x SPI TPM header 1 x S/PDIF out header(s) 1 x Front panel audio connector(s) (AAFP) 1 x Clear CMOS jumper(s) 1 x System panel connector 1 x COM port header 1 x Speaker connector |
| Form Factor | Micro ATX |
|---|---|
| LED Lighting | None RGB |
| Dimensions (W x L) | 9.6" x 9.6" |
| Power Pin | 1 x 24-pin EATX Power connector(s) 1 x 8-pin EATX 12V Power connectors |
| Windows 11 | Supported |
|---|
| Features | Software Features: ASUS Exclusive Software Armoury Crate AI Suite 3 - Performance And Power Saving Utility TurboV EVO EPU Digi+ VRM Fan Xpert 2+ - EZ update ASUS CPU-Z AI Charger DAEMON Tools Norton Anti-virus software (Free Trial for 60 days) WinRAR UEFI BIOS ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - ASUS UEFI BIOS EZ Mode ASUS Special Features: ASUS 5X PROTECTION III - ASUS DIGI+ VRM - ASUS LANGuard - ASUS Overvoltage Protection - ASUS SafeSlot Core - ASUS Stainless-Steel Back I/O ASUS Q-Design - ASUS Q-DIMM - ASUS Q-Slot ASUS Thermal Solution - Aluminum heatsink design ASUS Lighting Control BIOS: 256MB Flash ROM, UEFI AMI BIOS Manageability: WOL by PXE Operating System: Windows 10 64-bit |
|---|
| Package Contents | Accessories: User's manual I/O Shield 2 x SATA 6Gb/s cable(s) 1 x Supporting DVD 1 x M.2 SSD screw package(s) |
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| First Listed on Newegg | March 19, 2026 |
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