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ASRock Fatal1ty B450 GAMING-ITX/AC AM4 AMD Promontory B450 SATA 6Gb/s Mini ITX AMD Motherboard

In stock.
Ships from United States.
  • B450 GAMING K4
  • B450 PRO4
  • B450 Steel Legend
  • B450M-HDV
  • B450M-HDV R4.0
  • B450M PRO4
  • B450M PRO4 R2.0
  • B450M PRO4-F
  • B450M Steel Legend
  • AMD Promontory B450
  • AMD 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
white ASRock logo on a black background B450 motherboard next to its product box
ASRock Fatal1ty B450 Gaming-ITX/ac Motherboard

Based on the AMD B450 chipset, the ASRock Fatal1ty B450 Gaming-ITX/ac motherboard flawlessly supports the latest AMD Ryzen processors of up to eight cores in the AM4 socket. Although it comes in a mini ITX form factor, this board offers all the essentials needed to build a compact powerhouse. This board includes dual memory slots, a PCIe 3.0 x16 slot covered with a metal plate, an Ultra M.2 slot and two USB 3.1 Gen 2 ports (rear Type-A + Type-C). Built-in 802.11ac WiFi + Bluetooth 4.2 give users ultra-fast WiFi speeds and easy connecting to Bluetooth-compatible peripherals and mobile devices. The on-board addressable LED header offers you the ability to customize your rig to your liking. Plus, everything on this motherboard is built with Super Alloy components. All together, the Fatal1ty B450 Gaming-ITX/ac motherboard is a truly solid foundation that empowers your new build to thrive and power through in even the most demanding applications.

  • AMD AM4 Socket
  • Supports DDR4 3466+ (OC)
  • 1x PCIe 3.0 x16
  • Graphics Outputs: DisplayPort 1.2 and HDMI 2.0
  • 7.1 CH HD Audio (Realtek ALC1220 Audio Codec), Supports Creative Sound Blaster Cinema 5
  • 4x SATA 3, 1 Ultra M.2 (PCIe Gen3 x4 & SATA 3)
  • 2x USB 3.1 Gen2 (Rear Type-A + Type-C)
  • 4x USB 3.1 Gen1 (2 Front, 2 Rear)
  • Intel Gigabit LAN
  • Intel 802.11ac WiFi + BT 4.2
B450 motherboard facing slightly to the right with 12 graphic-circled numbers on key components
  1. Fatal1ty Mouse Port
  2. DP, HDMI
  3. USB 3.1 Gen2 Type-A+C
  4. Intel 1219V Gigabit LAN
  5. Dual Band 802.11ac WiFi
  6. Nichicon Fine Gold Series Audio Caps
  7. Nichicon 12K Black Caps
  1. Digi Power
    9 Power Phase Design
    Premium Power Choke
    Dual-N MOSFET
  2. Supports AMD AM4 Socket Ryzen Series CPUs
  3. 4 SATA3 6Gb/s
  4. PCI-E Steel Slots
  5. Ultra M.2 Socket
    (PCIe Gen3 x4 & SATA3)
Background HDD graphic icon with red HDD, SATA SSD and NVMe SSD icons and text
AMD StoreMI Technology

AMD StoreMI is a powerful tool that combines the speed of your SSD with the capacity of your hard disk into a single, fast, easy-to-manage drive. SSDs are fast but expensive, while offering minimal capacity. Mechanical hard drives boast large capacities at a low price point, but are much slower than SSDs. AMD StoreMI technology "fuses" these two types of storage into a single drive and automatically moves the data you access the most to work through the SSD, so you get the best of both worlds—quick SSD responsiveness and immense mechanical hard-disk capacity. You can also use up to 2GB of RAM as a last-level cache for ultra-fast data.

Rule Your Own Lighting with Polychrome RGB

In addition to having built-in RGB illumination, this motherboard also features on-board RGB headers* and an addressable RGB header** that allow the motherboard to be connected to compatible LED devices such as light strips, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified line of accessories to create their own unique lighting effects.

* The RGB LED header supports standard 5050 RGB LED strips (12V/G/R/B) with a maximum power rating of 3A (12V) and length within 2 meters.
** The addressable RGB LED header supports WS2812B addressable RGB LED strips (5V/Data/GND) with a maximum power rating of 3A (5V), a max amount of 80 LEDs and length within 2 meters.

ASRock Polychrome Sync and ASRock Polychrome RGB badges Icons and text for the following lighting modes: static, breathing, strobe, music, cycling, wave and random B450 motherboard facing slightly to the right with a hotspot closeup to the adressable RGB LED header and RGB LED header. To the bottom of the motherboard are LED light strips and AMO LED CPU fans. Also below the motherboard is a window of the ASRock Polychrome RGB software RGB lit devices such as: case fans, memory sticks, led strips, power supplies, cases, radiator coolers and CPU coolers
A blonde woman in the background listening to white over-ear headphones. The edge of the motherboard where the audio capacitors is being shown in the forefront with the Sound Blaster Cinema 5 logo
Creative Sound Blaster Cinema 5

By choosing the ASRock Fatal1ty B450 gaming motherboard, users become introduced to Creative Sound Blaster Cinema 5's whole new world of cinematic audio that produces unprecedented levels of audio realism, dynamics and punch to deliver the best gaming sounds. 7.1 CH HD audio along with the Realtek ALC1220 audio codec brings a truly immersive audio experience up to 120dB SNR.

A red graphic showing an m.2 ssd can be installed on the B450 motherboard
Ultra M.2 32Gb/s (PCIe Gen3 x4 & SATA3)

The PCIe Gen3 x4 Ultra M.2 interface pushes data-transfer speeds up to 32Gb/s. It also supports SATA 3 6Gb/s M.2 modules.

Closeup shot showing the Type-A and Type-C USB 3.1 ports on the B450 motherboard
Dual USB 3.1 Gen2 (Type-A + Type-C)

This motherboard has a pair of onboard Type-A and Type-C USB 3.1 Gen2 ports built on the rear I/O for supporting next-generation USB 3.1 Gen2 devices while delivering up to 10Gb/s data-transfer rates.

USB 3.1 Gen2 doubles data-transfer rates!

red and gray Horizontal line graph showing how usb 3.1 gen2 type-a is two times faster than USB 3.1 gen1 type-a

USB 3.1 Gen2 Type-C doubles charging speed!

yellow and gray Horizontal line graph showing how usb 3.1 gen2 type-c is two times faster than USB 3.1 gen1 type-c
The Intel Gigabit Ethernet port shooting light out from the B450 motherboard
Intel LAN

Intel LAN provides the best throughput performance, lower CPU utilization, enhanced stability and is able to deliver an ultimate network experience to users!

Graphic of the side of the B450, showing the 2oz copper inner layer between the pcb panels
2oz Copper

The ASRock Fatal1ty B450 GAMING-ITX/AC motherboard is made with 2-ounce copper inner layers. By using only carefully selected copper materials for the motherboard's PCB layers, users get overall lower temperatures and higher energy efficiency for overclocking.

Closeup of the B450 motherboard PCI-E slot
PCI-E Steel Slots

These ASRock motherboards come with advanced PCI-E steel-made slots that pack solid coverage and prevent any signal interference with graphics cards. It also ensures heavy graphics cards can be safely installed.

F-Stream—Modify Your Weapon
Key Master

The Key Master function consists of two major features: sniper key and macros. Ultimately, Key Master enhances your mouse and keyboard with customizable macros, sniper modes, key-repeat rates and repeat delay.

Key Master logo next to a red crosshair

F-Stream is Fatal1ty's multi-purpose software suite with a new interface, more new features and improved utilities.

F-Stream software window
Fatal1ty Mouse Port

After plugging a USB mouse into the Fatal1ty mouse port and running F-Stream, gamers can choose their own preferred mouse polling rate from 125Hz to 1000Hz.

Closeup of the the Fatal1ty mouse port
graphical text that reads: Super Alloy Motherboard
Premium Power Choke
Closeup on the B450 motherboard's power choke

Compared to traditional chokes, ASRock's premium power chokes effectively make the saturation current up to three times better, providing enhanced Vcore voltage to the motherboard.

B450 motherboard closeup on the Dual-N MOSFET

Combining two silicon dies into one MOSFET, this product's Dual-N MOSFET provides a larger die area and lower Rds(on), so the power supply to the CPU Vcore is more efficient.

Nichicon 12K Black Caps
Closeup of the 12K black caps on the B450 motherboard

The ASRock Fatal1ty B450 motherboard comes equipped with supreme Nichicon 12K black capacitors that boast lifespans of at least 12,000 hours. Compared to other counterparts on high-end motherboards that merely have lifespans of around 10,000 hours, these caps offer 20% longer lifespans and provide more stability and reliability for your system.

Matte-Black PCB
Closeup of the B450 motherboard's edge

A new + mysterious matte-black and copper color-scheme perfectly matches the prestigious components on this ASRock high-end motherboards.

High-Density Glass-Fabric PCB
Image comparing the fibers between a high density design (tighter) and a traditional design (looser) on PCBs

This motherboard's high-density glass-fabric PCB design reduces the gaps between the PCB layers to protect the motherboard against electrical shorts caused by humidity.

2oz Copper PCB
Graphic showing the 2oz copper layer below the motherboard's PCB

Using only carefully selected copper materials for PCB layers, ASRock's 2oz Copper PCB delivers lower temperatures and higher energy efficiency for overclocking.

Gaming Armor Built to Kill

Allow ASRock to be your most trustworthy ally that provides both hardware and software support.

Closeup of the b450 motherboard's power connector

High-Density Power Connector

Closeup of the B450 motherboard's memory slots

15µ Gold Contact

VGA Card
Closeup of the b450's PCI-e slot

15µ Gold Contact

Intel Gigabit Ethernet logo

Intel LAN

Closeup of the gold-plated audio caps on the ASRock b450 motherboard

Creative Sound Blaster Cinema 5

Closeup of the water pump header on the motherboard
Water Pump Header

Adding to this motherboard's great functionality, the CPU fan header also supports water pumps! This header provides a maximum of 2A power for supporting the most popular water pumps. Users can also adjust the voltage of their water pump to get higher cooling performance with lower noise.

Closeup of the Fatal1ty moust port
Fatal1ty Mouse Port

After plugging a USB mouse into the Fatal1ty mouse port and running F-Stream, gamers can choose their own preferred mouse polling rate from 125Hz to 1,000Hz.

Audio jacks on the B450 motherboard
Gold Audio Jacks

Everything will wear off in time, but gold looks better! Gold audio jack provides stable sound transmission!

Full Spike Protection logo and text
Full Spike Protection

Some sensitive digital components on the motherboard are vulnerable to power surges and the excessive current may cause your system to malfunction immediately. ASRock Full Spike Protection includes various technologies to prevent your motherboard's components from being damaged by these unexpected voltage spikes.

ASRock app shop logo along with app logos for games, features, software and browsers
Live Update & APP Shop

ASRock Live Update & APP Shop is designed for your convenience. We provide various apps and support software for users to download. You can also easily optimize your system and keep your motherboard up to date with ASRock Live Update & APP Shop.

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Return Policies

  • Return for refund within: 30 days
  • Return for replacement within: 30 days
  • This item is covered by's Standard Return Policy