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Square Mini-ITX board, black PCB with silver heatsinks and a gold PCIe slot

ASRock

ASRock Fatal1ty B450 GAMING-ITX/AC AMD motherboard

SKU CH-8STP-0CTCW

Mini ITX board for AM4 Ryzen 2000 and 3000 CPUs with dual-channel DDR4 up to 32 GB, one PCIe 3.0 x16 slot, Ultra M.2 up to Gen3 x4, four SATA3 ports.

  • CPU Socket TypeAM4
  • CPU TypeSupports AMD AM4 Socket Ryzen 2000 and 3000 Series Desktop P
  • ChipsetAMD Promontory B450
  • Number of Memory Slots2x288pin (DDR4)
  • Memory StandardAMD Ryzen series CPUs (Matisse) support DDR4 3200/ 2933/ 266
  • Maximum Memory Supported32GB
  • Compact Mini-ITX board fits small builds
  • AM4 socket supports Ryzen 2000 and 3000 series CPUs
  • Dual-channel DDR4 up to 32 GB with speeds to 3466+(OC)
  • Ultra M.2 socket delivers Gen3 x4 32 Gb/s storage bandwidth
  • Intel i211AT LAN plus 802.11ac Wi-Fi module for wired and wireless networking

Compact AM4 platform

The ASRock Fatal1ty B450 GAMING-ITX/AC is a Mini-ITX motherboard for AMD Ryzen 2000 and 3000 series processors. It targets builders who need a small-form-factor system with integrated Wi-Fi and dual-channel DDR4 support. The board uses the AMD Promontory B450 chipset and fits cases designed for the ITX footprint.

Straightforward ITX build

Installation follows the standard Mini-ITX pattern with two 288-pin DDR4 slots and a single PCIe 3.0 x16 slot. The vertical M.2 Key E socket ships with the 802.11ac module already fitted, so wireless is active immediately. A common issue is forgetting to update the BIOS before installing a newer Ryzen 3000 CPU, which prevents the system from posting.

B450 interface limits

The chipset provides four SATA 6.0Gb/s ports with RAID 0, 1 and 10 support. The Ultra M.2 socket runs at PCIe 3.0 x4 (32Gb/s) with Matisse, Summit Ridge, Pinnacle Ridge, Raven Ridge or Picasso CPUs, but drops to x2 (16Gb/s) with other supported processors. Memory tops out at 32GB across two slots, and the LAN controller is limited to 1Gbps.

Rear I/O includes HDMI

The rear panel carries an HDMI port driven by the APU’s integrated Radeon graphics, supporting DirectX 12 and up to 16GB of shared system memory. Audio runs through a Realtek ALC1220 codec delivering 7.1 channels. No legacy video outputs are present, so a discrete GPU or compatible APU is required for display.

Highlights

  • Compact Mini-ITX board fits small builds
  • AM4 socket supports Ryzen 2000 and 3000 series CPUs
  • Dual-channel DDR4 up to 32 GB with speeds to 3466+(OC)
  • Ultra M.2 socket delivers Gen3 x4 32 Gb/s storage bandwidth
  • Intel i211AT LAN plus 802.11ac Wi-Fi module for wired and wireless networking

Specifications

BrandASRock
SeriesFatal1ty
ModelB450 GAMING-ITX/AC
CPU Socket TypeAM4
CPU TypeSupports AMD AM4 Socket Ryzen 2000 and 3000 Series Desktop Processors
ChipsetAMD Promontory B450
Number of Memory Slots2x288pin (DDR4)
Memory StandardAMD Ryzen series CPUs (Matisse) support DDR4 3200/ 2933/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*
AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4 3466+(OC)/ 3200(OC)/ 2933/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*
AMD Ryzen series CPUs (Picasso) support DDR4 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory*
AMD Ryzen series CPUs (Summit Ridge) support DDR4 3466+(OC)/ 3200(OC)/ 2933(OC)/ 2667/2400/2133 ECC & non-ECC, un-buffered memory*
AMD Ryzen series CPUs (Raven Ridge) support DDR4 3466+(OC)/ 3200(OC)/ 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory*
Maximum Memory Supported32GB
Channel SupportedDual Channel
PCI Express 3.0 x16AMD Ryzen series CPUs (Matisse, Summit Ridge and Pinnacle Ridge)
- 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode) (Supports PCIe riser cards to extend one x16 slot to two x8 slots if you install AMD Ryzen series CPUs)*
AMD Ryzen series CPUs (Picasso, Raven Ridge)
- 1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)*
AMD Athlon series CPUs
- 1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)*
* Supports NVMe SSD as boot disks
Other Slots1 x Vertical M.2 Socket (Key E) with the bundled Wi-Fi-802.11ac module (on the rear I/O)
15µ Gold Contact in VGA PCIe Slot (PCIE1)
Serial ATA (SATA)4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug
M.21 x Ultra M.2 Socket, supports M Key type 2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s) (with Matisse, Picasso, Summit Ridge, Raven Ridge and Pinnacle Ridge) or Gen3 x2 (16Gb/s) (with Athlon series APU)*
* Supports NVMe SSD as boot disks
SATA RAID0/1/10
Onboard Video ChipsetIntegrated AMD Radeon Vega Series Graphics in Ryzen Series APU*
Integrated AMD Radeon R-Series Graphics in A-series APU*
DirectX 12, Pixel Shader 5.0
Shared memory default 2GB. Max Shared memory supports up to 16GB.**
Dual graphics output: Support HDMI and DisplayPort 1.2 by independent display controllers
Supports HDMI 2.0 with max. resolution up to 4K x 2K (4096x2160) @ 60Hz
Supports DisplayPort 1.2 with max. resolution up to 4K x 2K (4096x2160) @ 60Hz
Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI 2.0 Ports (Compliant HDMI 2.0 monitor is
Audio ChipsetRealtek ALC1220
Audio Channels7.1 Channels
LAN ChipsetIntel i211AT
Max LAN Speed1Gbps
Wireless LANIntel 802.11 ac Wi-Fi Module
Supports IEEE 802.11 a/b/g/n/ac
Supports Dual-Band (2.4/5 GHz)
Supports high speed wireless connections up to 433 Mbps
BluetoothSupports Bluetooth 4.2 / 3.0 + High speed class II
Back I/O Ports2 x Antenna Ports
1 x PS/2 Mouse/Keyboard Port
1 x HDMI Port
1 x DisplayPort 1.2
1 x Optical SPDIF Out Port
2 x USB 2.0 Ports (Supports ESD Protection)*
1 x USB 3.1 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)
1 x USB 3.1 Gen2 Type-C Port (10Gb/s) (Supports ESD Protection)
2 x USB 3.1 Gen1 Ports (Supports ESD Protection)
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)
* 1 x Fatal1ty Mouse Port (USB 2.0) is included
Onboard USB1 x USB 2.0 Header (Supports 2 USB 2.0 ports) (Supports ESD Protection)
1 x USB 3.1 Gen1 Header (Supports 2 USB 3.1 Gen1 ports) (Supports ESD Protection)
Other Connectors1 x LPC Header
1 x Addressable LED Header
* Supports in total up to 5V/3A, 15W LED Strip.
1 x AMD Fan LED Header
* The AMD Fan LED Header supports LED strips of maximum load of 3A (36W) and length up to 2.5M.
1 x CPU Fan Connector (4-pin)
* The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.
2 x Chassis/Water Pump Fan Connectors (4-pin) (Smart Fan Speed Control)
* The Chassis/Water Pump Fan supports the water cooler fan of maximum 2A (24W) fan power.
* CHA_FAN1/WP and CHA_FAN2/WP can auto detect if 3-pin or 4-pin fan is in use.
1 x Front Panel Audio Connector (1
Form FactorMini ITX
LED LightingRGB
Dimensions (W x L)6.7" x 6.7"
Power Pin1 x 24-pin ATX Power Connector
1 x 8-pin 12V Power Connector (Hi-Density Power Connector)
Windows 11Supported

Questions about this item

Will my existing DDR4-3200 modules run at their rated speed with a Ryzen 3000 processor?

Yes. The board supports DDR4 3200, 2933, 2667, 2400 and 2133 with Matisse CPUs, so 3200 is a native JEDEC speed for that generation.

Can I add a fast M.2 SSD and still use the supplied Wi-Fi module?

Yes. The Ultra M.2 socket (Key M, 2280) handles PCIe Gen3 x4 or SATA drives, while Wi-Fi uses a separate vertical Key E socket on the rear I/O.

Is the onboard 1 GbE LAN port sufficient for gigabit internet plans?

The Intel i211AT controller provides a dedicated PCIe 1 Gbps link, matching typical gigabit fibre or cable subscriptions.

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