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White ATX motherboard with silver heatsinks and black PCB, plus boxed Ryzen 5 5500 CPU

ASUS

ASUS ROG STRIX B550-A GAMING AM4 AMD Motherboard with Ryzen 5 5500 Combo

SKU CH-Z8E5-S50MY

ATX B550 board with four DDR4 slots up to 128GB, PCIe 4.0 x16, three M.2 sockets, six SATA ports and SupremeFX audio, bundled with a 65W six-core Ryzen 5 5500 CPU

  • CPU socketAM4
  • ChipsetAMD B550
  • Form factorATX
  • Memory slot count4 × 288pin (DDR4)
  • Supported memoryDDR4 5100(OC) / 4800(OC) / 4600(OC) / 4400(OC) / 4133(OC) /
  • Max supported RAM128 GB
  • Ready for high-speed DDR4 up to 5100 MT/s overclocked
  • Six-core Ryzen 5500 processor included for immediate performance
  • Dual PCIe 4.0 and 3.0 slots for flexible GPU and storage
  • SupremeFX S1220A audio delivers 8-channel high-definition sound
  • Four DIMM slots support up to 128 GB DDR4 memory

Combo foundation

This bundle pairs an ASUS ROG STRIX B550-A GAMING motherboard with an AMD Ryzen 5 5500 six-core processor. The AM4 socket board uses the AMD B550 chipset and supports DDR4 memory up to 5100 MT/s when overclocked. It is suited for builders who want a ready-to-run platform for gaming or productivity without selecting parts separately.

Memory and storage scope

Four 288-pin slots accept up to 128 GB of dual-channel DDR4 across a wide range of validated speeds from 2133 to 5100 MT/s depending on the CPU installed. Three M.2 sockets take 2242, 2260, 2280 and 22110 modules with both SATA and PCIe 4.0 x4 modes available on the primary slot. Six SATA 6Gb/s ports add RAID 0, 1 and 10 support for larger drive arrays.

Connectivity and build

The ATX board provides one PCIe 4.0 x16 slot, one PCIe 3.0 x16 slot running at x4 and three PCIe 3.0 x1 slots for expansion cards. Rear I/O includes 8-channel audio driven by the SupremeFX S1220A codec. Onboard video output works only with processors that have integrated graphics. The 65 W CPU fits standard AM4 coolers and the layout keeps primary expansion clear for graphics cards.

How it compares

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

Price $515.99
Pricier than about 66% 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
Product lineROG
Model nameSTRIX B550-A GAMING
Processor
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryDDR4 5100(OC) / 4800(OC) / 4600(OC) / 4400(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3600(OC) / 3466(OC) / 3200 / 3000 / 2800 / 2666 / 2400 / 2133 (AMD Ryzen 4000 G-Series Processors)
DDR4 4600(OC) / 4400(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3600(OC) / 3466(OC) / 3200 / 3000 / 2800 / 2666 / 2400 / 2133
Max supported RAM128 GB
Memory channelsDual Channel
ECC supportECC Memory (ECC mode) support varies by CPU.
BufferingUn-buffered
Storage
SATA ports6 x SATA 6Gb/s
M.2 slots3rd Gen AMD Ryzen Processors:
1 x M.2_1 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIe 4.0 x4 mode)
AMD B550 Chipset:
1 x M.2_2 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x4 mode)*
* When the M.2_2 Socket 3 is populated, SATA6G_5/6 ports will be disabled.
SATA and RAID support0/1/10
Graphics
Onboard video chipSupported only by CPU with integrated graphic
Audio & video
Audio chipROG SupremeFX High Definition Audio CODEC S1220A
Sound channels8 Channels*
* Due to limitations in HDA bandwidth, 32-Bit/192 kHz is not supported for 8-Channel audio.
Connectivity
Ethernet controllerIntel I225-V
Maximum network speed2.5 Gbit/s
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16*
* Actual support may vary by CPU.
PCIe 3.0 x16 slots1 x PCIe 3.0 x16*
* Supports x4 mode.
* PCIEX16_2 shares bandwidth with PCIE x1_1, PCIE x1_2, and PCIE x1_3.
PCIe x1 slots3 x PCIe 3.0 x1
Onboard USB headers1 x USB 3.2 Gen 1 (up to 5 Gbit/s) 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)
Power
Power connectors1 × 24-pin EATX Power connector(s)
1 × 8-pin ATX 12 V Power connector(s)
1 × 4-pin ATX 12 V Power connector(s)
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
LightingRGB

Questions about this item

Will the board run a Ryzen 5000 series CPU out of the box?

A BIOS update might be required before the Ryzen 5000 series processor will post, so plan for a supported older CPU or USB BIOS FlashBack if available.

What DDR4 speeds can I use with the included Ryzen 5 5500?

The 5500 officially supports up to 3200 MT/s; the board lists higher OC speeds such as 3600, 3866, 4000, 4133, 4400 and 4600 MT/s, but those require manual tuning.

How many SATA drives and M.2 slots does the combo provide?

Six SATA 6Gb/s ports and two M.2 sockets (one CPU-linked at PCIe 4.0 x4, one chipset-linked) are available for storage.

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