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ASRock AB350 Pro4 AM4 AMD Promontory B350 SATA 6Gb/s USB 3.0 HDMI ATX Motherboard

MPN: AB350 Pro4 | SKU: UP9902
Regular Price: $135.56
Price: $129.89
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  • Chipset: AMD Promontory B350 PRO4;Supports Triple Monitor
  • Memory: 4x DDR4-2667/2400/2133 DIMM Slots, Dual Channel, ECC, Non-ECC, Unbuffered, Max Capacity of 64GB
  • Slots: 2x PCI-Express 3.0 x16 Slots (one runs at x4), 4x PCI-Express 2.0 x1 Slots
  • SATA: 6x SATA3 Ports, Four Support RAID 0, 1, 10
  • Audio: Realtek ALC892 7.1-Channel High Definition Audio CODEC
  • NOTE: Refer the User Manual before use.
  • 4.0 Stars based on 41 Review(s)
  • UPC: 4717677333169
  • Condition: New
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  • Description
  • Product Details
  • Customer Reviews
  • Q&A

The ASRock AB350 Pro4 Motherboard is the perfect home for your new AM4-compatible processor.ASRock AB350 PRO4 Socket AM4/AMD B350/DDR4/SATA3&USB3.0/M.2/A&GbE/ATX Motherboard, Supports AMD Socket AM4 A-Series APUs (Bristol Ridge) and Ryzen Series CPUs (Summit Ridge).Prepare yourself well to enjoy the impressive world of Virtual Reality. Before that, you have to make sure everything is qualified, including hardware, software and drivers. Motherboard is the key to connect every critical components and ASRocks VR Ready motherboards are definitely the one youre looking for. The premium qualify is assured by rigorous testing during development. The sturdy components and rock-slid performance makes you completely immersive in the VR scenario. Users can be assured to experience VR enjoyments without any compatibility problems.

The ASRock AB350 Pro4 motherboard supports AM4 processors and will fit in a standard ATX case. This board is powered by the AMD B350 chipset and has support for 4 x 288-pin DIMM memory sticks with a max memory of up to 64GB. You can choose memory speeds of up to DDR4-2133 / 2400 / 2666 / 2933 / 3200. This motherboard has 6 SATA ports and 1 x 10/100/1000 Mbps Ethernet built-in. Advanced features of the motherboard include: support for RAID, support for Crossfire, stylish Black / White design.

  • AMD Promontory B350
  • Supports AMD Socket AM4 A-Series APUs (Bristol Ridge) and Ryzen Series CPUs (Summit Ridge and Raven Ridge)
  • DDR4 Support


  • ASRock AB350 Pro4 AM4 Motherboard
  • Quick Installation Guide, Support CD, I/O Shield
  • 2 x SATA Data Cables
  • 2 x Screws for M.2 Sockets

Item#: UP9902

Brand: ASRock

MPN: AB350 Pro4

UPC: 4717677333169

Compatibility: AM4, ATX

Rating: 4.0 Stars based on 41 Review(s)

Packaging: Retail

Availability: Out of Stock

Condition: New

Rebate From MIR | Valid Through 12/31/2019| Download Rebate Form

AB350 Pro4
CPU Socket Type
Processor Type
Supports AMD Socket AM4 A-Series APUs (Bristol Ridge) and Ryzen Series CPUs (Summit Ridge and Raven Ridge)
AMD Promontory B350
Number of Memory Slots
Memory Standard
AMD Ryzen series CPUs (Summit Ridge) support DDR4 3200+(OC)/ 2933(OC)/ 2667/ 2400/ 2133*
AMD Ryzen series CPUs (Raven Ridge) support DDR4 3200+(OC)/ 2933(OC)/ 2667/ 2400/ 2133*
AMD 7th Gen A-Series APUs support DDR4 2400/ 2133*
*Please refer to Memory Support List on ASRock's website for more information.
Maximum Memory Supported
*Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation.
Channel Supported
Dual Channel
PCI Express 3.0 x16
AMD Ryzen series CPUs
- 2 x PCI Express 3.0 x16 Slots (single at x16 (PCIE2); dual at x16 (PCIE2) / x4 (PCIE4))
AMD 7th A-Series APUs/ Raven Ridge CPUs
- 2 x PCI Express 3.0 x16 Slots (single at x8 (PCIE2); dual at x8 (PCIE2) / x2 (PCIE4))
PCI Express x1
4 x PCI Express 2.0 x1 Slots
SATA 6Gb/s
4 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug*
2 x SATA3 6.0Gb/s Connectors by ASMedia ASM1061, support NCQ, AHCI and Hot Plug
* M2_2 and SATA3_3 share lanes. If either one of them is in use, the other one will be disabled.
M.2 (Key M)
1 x Ultra M.2 Socket (M2_1), type 2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32Gb/s) (with Ryzen Series CPU) or Gen3 x2 (16Gb/s) (with A-Series APU)**
1 x M.2 Socket (M2_2), type 2230/2242/2260/2280/22110 M.2 SATA3 6.0Gb/s module**

** If M2_1 is occupied, PCIE4 will be disabled.
** Supports NVMe SSD as boot disks.
** Supports ASRock U.2 Kit.
Onboard Video Chipset
Integrated 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
Max. shared memory 2GB
Three graphics output options: D-Sub, DVI-D and HDMI
Supports Triple Monitor
Supports HDMI max.: 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz
Supports DVI-D max.: 1920x1200 @ 60Hz
Supports D-Sub max.: 1920x1200 @ 60Hz
Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and HBR (High Bit Rate Audio) with HDMI Port (Compliant HDMI monitor is required)
Supports HDCP with DVI-D and HDMI Ports
Supports Full HD 1080p Blu-ray (BD) playback with DVI-D and HDMI Ports

*Actual support may vary by CPU
Audio Chipset
Realtek ALC892
Audio Channels
7.1 CH
*To configure 7.1 CH HD Audio, it is required to use an HD front panel audio module and enable the multi-channel audio feature through the audio driver.
LAN Chipset
Realtek RTL8111GR
Max LAN Speed
1 x PS/2 keyboard/mouse port
Video Ports
1 x D-Sub Port
1 x DVI-D Port
1 x HDMI
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
USB 3.1
1 x USB 3.1 Gen1 Type-C Port
5 x USB 3.1 Gen1 Ports
USB 1.1/2.0
2 x USB 2.0 Ports
Audio Ports
HD Audio Jacks: Line in / Front Speaker / Microphone
Onboard USB
2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
1 x USB 3.1 Gen1 Header (Supports 2 USB 3.1 Gen1 ports)
Other Connectors
1 x COM Port Header
1 x TPM Header
1 x Power LED and Speaker Header
1 x RGB LED Header*
1 x AMD Fan LED Header*
1 x CPU Fan Connector (4-pin)**
3 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control)***
1 x Front Panel Audio Connector

*Supports in total up to 12V/3A, 36W LED Strip.
*The AMD Fan LED Header supports LED strips of maximum load of 3A (36W) and length up to 2.5M.
**The CPU Fan Connector supports the CPU fan of maximum 1A (12W) fan power.
***CHA_FAN2 and CHA_FAN3 can auto detect if 3-pin or 4-pin fan is in use.
Form Factor
Dimensions (W x L)
12.0" x 8.8"
Power Pin
1 x 24-pin ATX Power Connector
1 x 8-pin 12V Power Connector
Unique Feature:
ASRock Super Alloy
- Premium Power Choke
- Sapphire Black PCB
- High Density Glass Fabric PCB
- 2oz Copper PCB
ASRock Ultra M.2 (PCIe Gen3 x4)
ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
ASRock Live Update & APP Shop

- 128MB AMI UEFI Legal BIOS with multilingual GUI support
- Supports "Plug and Play"
- ACPI 5.1 compliance wake up events
- Supports jumperfree
- SMBIOS 2.3 support
- DRAM Voltage multi-adjustment

Software and UEFI:
- ASRock A-Tuning
- ASRock APP Charger
- ASRock XFast LAN
- ASRock Full HD UEFI
- ASRock Instant Flash
- ASRock Internet Flash
- ASRock Easy RAID Installer
*These utilities can be downloaded from ASRock Live Update & APP Shop.

Support CD:
- Drivers, Utilities, AntiVirus Software (Trial Version), Google Chrome Browser and Toolbar

Hardware Monitor:
- CPU/Chassis temperature sensing
- CPU/Chassis Fan Tachometer
- CPU/Chassis Quiet Fan
- CPU/Chassis Fan multi-speed control
- Voltage monitoring: +12V, +5V, +3.3V, Vcore

- Microsoft Windows 10 64-bit

- ErP/EuP ready (ErP/EuP ready power supply is required)
Review Summary
46.34% (19)
17.07% (7)
7.32% (3)
9.76% (4)
19.51% (8)
By Aubree Williams
Just built my new computer. I essentially copied the ...
Just built my new computer. I essentially copied the same built as my boyfriend (except i got a samsung ssd instead of pny). After a couple mishaps, everything seems to be working smoothly.
Excellent bang for the buck.
Used on a ryzen 1700 build. A solid motherboard for the price - as with all asrock products. Haven't used another brand for 5 or 6 builds.
By Sidney Boersema
Four stars
Good stuff :)
Great motherboard. Love the design
Great motherboard. Love the design, simply black and white is going to work perfectly for my build when it is complete. The rgb is subtle to not take away from the rest of the board. Functions perfectly. Allows easy overclocking on my ryzen 7 1700. I only have 2 8gb sticks for the moment but this board will allow for future upgrades.
Decent for basic builds. Can't vouch for gaming or ocs.
For a budget mb, i'm completely satisfied. I bought it for compatibility with the ryzen cpus, but for budget purposes, i installed an a89600 apu in it just to get things up and running. I can worry about upgrading to a more powerful cpu later if i need to, but i have no intentions of messing with overclocks and i'm not a gamer, so i probably won't even need to. After installing this mb in an old (15+ years) atx case, i plugged in the power supply, turned it on, and got excellent results right out of the box. I had no issues with my (crucial 4gb single ddr4 2133 mt/s (pc4-17000) sr x8 unbuffered dimm 288-pin memory - ct4g4dfs8213) ram installed in the second ram slot. I installed win10 on a ssd and am right now running two old laptop hard drives as internal storage drives. Since i'm using an a89600 apu, i'm running onboard graphics through the apu and so far have no issues with running one vga monitor, though i have plans to run it with two monitors.I simply cannot speak to this mb's compatibility with gaming and ocs since i have no intention of doing either, but as a basic 'home' build, i'd say this mb is so far quite solid. I think my only strike against it is with the thermometers on the board. Running openhardwaremonitor to monitor the cpu temp, i have encountered occasions where the asrock a-tuning software will stop reading the mb's temperature properly (staying at 23c no matter how much work the cpu's doing). When this problem occurs, the a-tuning software no longer adjusts the fan speeds because it thinks the cpu's running cool even when it's running much hotter. If i allow a-tuning to run without running openhardwaremonitor, this problem does not occur. Take that info as you will. Overall, i'm quite satisfied.
By Hector Howard
Ok board
Loaded windows 10 had an ethernet issue right off the bat. Otherwise a nice board.
Pepe the frog
Great budget board and can handle a bit of flex, i bent this bad boy about .25-.50 of an inch trying to install a usb 3.0 header, and it works to this day. Ryzen 5 1600x represent.
By Franca Dupont
Dead on arrival
Giving this one star because it came in dead on arrival. It wouldn't post after being installed.
By Matilda Walker
Bios was easy to work with
Built 2 budget gaming rigs with these, one with ryzen 1200 and one with 1300x. Was able to stable oc to 3.7 and 3.85 respectively on stock coolers. A few months in and haven't had any issues. Bios was easy to work with. 1st build had gskill aegis 3000 ram that defaulted at 2133, but easily changed voltage to 1.35 and got it to 3000 without any issues. 2nd build had avexir core series 2400 that it posted with the right speed. Check newegg for deals, they sometimes have these for $75 plus up to $30 in mail in rebates which gets you a solid full size atx board for $45. But be ready to wait a couple months for the rebate to come in.
By Annelise Robert
Good ryzen board
I used this motherboard to build a ryzen 5 1600 build in a phanteks eclipse p 300 case. With a gtx 1060 and 8gb of ram. I never built with an asrock before but i must say it was a real joy and i just love how simple the bios is.I would recommend this board to anyone,quite pleased.
Question & Answers
By OutletPC Shopper on 2018-08-24
Im looking to buy a AMD Ryzen 5 2600x cpu with this board and to work it I would need another cpu to update it which I dont have, is there anyway to get around this?

By Customer Service on 2018-08-29

Unfortunately not. All bios updates require a compatible CPU to run on the AMD motherboard architecture.

By OutletPC Shopper on 2017-03-29
Does this board support AMD CrossFire?

By Customer Service on 2017-03-31

Yes, this board supports AMD Quad CrossFireX™.

By OutletPC Shopper on 2018-08-10
What version of bios does this mobo come with ?

By Customer Service on 2018-08-10

The BIOS version this board would come with is Ryzen 2000 Series Ready.

By OutletPC Shopper on 2018-08-11
What should I do to get the $20 discount ?

By Customer Service on 2018-08-13

Please see the attached rebate link below.

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