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Green rectangular micro-ATX motherboard with black slots and silver heatsinks

GIGABYTE

GIGABYTE B550M DS3H AC AMD motherboard

SKU CH-CN67-E6AHH

Micro ATX board for AM4 Ryzen 5000 or 3rd Gen CPUs with four DDR4 slots up to 128 GB, one PCIe 4.0 x16 slot, four SATA 6 Gb/s ports, one M.2 socket, Realtek GbE LAN and 7.1-channel audio

  • ProcessorAMD Socket AM4, support for: AMD Ryzen 5000 Series / 3rd Gen
  • ChipsetAMD B550
  • Form factorMicro ATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memory3rd Gen AMD Ryzen Processors: Support for DDR4 4400(O.C.)/ 4
  • Supports Ryzen 5000 series and 3rd Gen Ryzen processors on AM4 socket
  • Dual-channel DDR4 memory up to 128 GB with speeds to 4733 MHz overclocked
  • PCIe 4.0 x16 graphics slot plus PCIe 3.0 x4 and x1 expansion slots
  • Four SATA 6 Gb/s ports and one M.2 socket for 2242 to 22110 drives
  • Realtek ALC887 audio with 7.1-channel output and 1 Gbps LAN

Compact AM4 B550 platform

The GIGABYTE B550M DS3H AC is a micro ATX motherboard built on the AMD B550 chipset for AM4 socket processors. It supports Ryzen 5000 Series and 3rd Gen Ryzen CPUs, including models with Radeon graphics. Four DDR4 slots accept up to 128GB of memory in dual channel mode.

Suits first builds and upgrades

This board fits builders who need PCIe 4.0 x16 from the CPU and a single M.2 slot for 2242/2260/2280/22110 SSDs. It also provides four SATA 6Gb/s ports, Realtek GbE LAN and 7.1 channel audio from the ALC887 codec. Users requiring multiple M.2 drives or 10GbE should look at larger ATX designs.

PCIe 4.0 x16 from CPU decides fit

With a Ryzen 5000 or 3rd Gen Ryzen processor the primary PCIEX16 slot runs at PCIe 4.0 x16, giving full bandwidth to modern graphics cards. APU variants drop that link to PCIe 3.0 x16, so the CPU choice determines whether the board delivers the faster interface.

How it compares

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

Price $107.99
Cheaper than about 74% 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 nameGIGABYTE
Model nameB550M DS3H AC
Processor
ProcessorAMD Socket AM4, support for: AMD Ryzen 5000 Series / 3rd Gen Ryzen and 3rd Gen Ryzen with Radeon Graphics Processors
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memory3rd Gen AMD Ryzen Processors:
Support for DDR4 4400(O.C.)/ 4000(O.C.)/ 3600(O.C.)/ 3333(O.C.)/ 3200/ 2933/ 2667/ 2400/ 2133 MHz memory modules
3rd Gen AMD Ryzen with Radeon Graphics processors:
Support for DDR4 4733(O.C.)/ 4600(O.C.)/ 4400(O.C.)/ 4000(O.C.)/ 3600(O.C.)/ 3333(O.C.)/ 3200/ 2933/ 2667/ 2400/ 2133 MHz memory modules
Max supported RAM128 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots1 x M.2 connector (M2A_CPU), integrated in the CPU, supporting Socket 3, M key, type 2242/2260/2280/22110 SSDs:
3rd Generation AMD Ryzen processors support SATA and PCIe 4.0 x4/x2 SSDs
3rd Generation AMD Ryzen with Radeon Graphics processors support SATA and PCIe 3.0 x4/x2 SSDs
1 x M.2 connector (M2B_SB), integrated in the Chipset, supporting Socket 3, M key, type 2242/2260/2280 SSDs:
Supporting SATA and PCIe 3.0 x2 SSDs
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC887
Connectivity
Ethernet controllerRealtek GbE LAN chip
Maximum network speed1 Gbit/s
Wi-Fi standardIntel Wi-Fi AC 3168
WIFI 802.11a/b/g/n/ac, supporting 2.4/5 GHz Dual-Band
Support for 11ac wireless standard and up to 433 Mbit/s data rate
* Actual data rate may vary depending on environment and equipment.
Bluetooth support4.2
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express x16 slot (PCIEX16), integrated in the CPU:
3rd Generation AMD Ryzen processors support PCIe 4.0 x16 mode
3rd Generation AMD Ryzen with Radeon Graphics processors support PCIe 3.0 x16 mode
* For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16 slot.
PCIe 3.0 x16 slots1 x PCI Express x16 slot (PCIEX4), integrated in the Chipset:
Supporting PCIe 3.0 x4 mode
PCIe x1 slots1 x PCI Express x1 slot (PCIEX1), integrated in the Chipset:
Supporting PCIe 3.0 x1 mode
Rear panel ports1 x PS/2 keyboard/mouse port
1 x DVI-D port
2 x SMA antenna connectors (1T1R)
1 x HDMI port
4 x USB 3.2 Gen 1 ports
4 x USB 2.0/1.1 ports
1 x RJ-45 port
3 x audio jacks
Onboard USB headers1 x USB 3.2 Gen 1 header
1 x USB 2.0/1.1 header
Power
Power connectors1 × 24-pin ATX main power connector
1 × 8-pin ATX 12 V power connector
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
LightingRGB

Questions about this item

What are the physical dimensions and mounting hole pattern of the B550M DS3H AC?

The board follows the Micro ATX form factor with standard mounting holes for Micro ATX cases.

How is the CPU installed on the AM4 socket, and what step is often missed?

Lift the retention arm, align the gold triangle on the processor with the socket corner, place it gently without force, lower the arm, then connect the CPU fan header before first boot.

Which components on this board may need replacement over time?

The CMOS battery cell and case/CPU fans are the only serviceable parts that typically require replacement during the board's lifespan.

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