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ASRock B450M PRO4 AM4 AMD Promontory B450 SATA 6Gb/s USB 3.1 HDMI Micro ATX AMD Motherboard

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  • 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 3200+(OC)/ 2933(OC)/ 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 3200+(OC)/ 2933(OC)/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory
  • AMD Ryzen series CPUs (Raven Ridge) support DDR4 3200+(OC)/ 2933/ 2667/ 2400/ 2133 non-ECC, un-buffered memory

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews
B450M B450M
B450M Pro4
  • AMD AM4 Socket
  • Supports DDR4 3200+ (OC)
  • 1 PCIe 3.0 x16, 1 PCIe 2.0 x16, 1 PCIe 2.0 x1
  • AMD Quad CrossFireX™
  • Graphics Output:HDMI, DVI-D, D-Sub
  • 7.1 CH HD Audio (Realtek ALC892 Audio Codec), ELNA Audio Caps
  • 4 SATA3, 1 Ultra M.2 (PCIe Gen3 x4), 1 M.2 (SATA3)
  • 2 USB 3.1 Gen2 (Rear Type-A+C)
  • 6 USB 3.1 Gen1 (2 Front, 4 Rear)
  • Realtek Gigabit LAN
B450M
AMD StoreMI Technology

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, and offer minimal capacity. Mechanical hard drives boast large capacity for a low price, but are much slower than an SSD. AMD StoreMI technology "combines" these two types of storage into a single drive and automatically moves the data you access the most to the SSD, so you get the best of both worlds: SSD responsiveness, and mechanical hard disk capacity. You can also use up to 2GB of RAM as a last-level cache for ultra-fast data.

B450M
Dual M.2 For SSD

Equipped with M.2 slot that supports both SATA3 6Gb/s and PCIe Gen3 x4 Ultra M.2 interface that pushes data transfer speeds up to 32Gb/s, and is compatible with ASRock's U.2 Kit for installing some of the world's fastest U.2 PCIe Gen3 x4 SSD.

B450M
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 and to deliver up to 10 Gbps data transfer rates.

USB 3.1 Gen2 doubles the data transfer rate

B450M

USB 3.1 Gen2 Type-C doubles the charge speed!

B450M
B450M
2oz Copper

It comes with 2 ounces copper inner layers, using only carefully selected copper materials for PCB layers, delivering lower temperature and higher energy efficiency for overclocking.

B450M
Premium 42A Power Choke
B450M

Compared to traditional chokes, ASRock's premium 42A power chokes effectively make the saturation current up to three times better, thus providing enhanced and improved Vcore voltage to the motherboard.

Sapphire Black PCB
B450M

Pure black PCB appearance. The new Sapphire Black PCB represents rock-solid quality and gives the motherboard a more mysterious touch.

High Density Glass Fabric PCB
B450M

High Density Glass Fabric PCB design that reduces the gaps between the PCB layers to protect the motherboard against electrical shorts caused by humidity.

2oz Copper PCB
B450M

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

B450M
Digi Power

This motherboard uses a next generation Hybrid Digi Power design to bring precise control and smooth power. With the ensured efficient and clean power delivery to the CPU, the stability and lifespan of motherboard is also greatly enhanced.

B450M
ELNA Audio Caps

Who says high quality audio is only available on high-end motherboards? ASRock applied ELNA audio capacitors on mainstream and entry-level motherboards! Compared with traditional solid caps, the leakage current of ELNA audio caps is merely 3uA. This is the key to reduce noise level significantly and satisfy even the pickiest audiophiles.

B450M
Solid Capacitor Design

ASRock applied solid capacitors on this motherboard. With these solid caps, this motherboard is allowed to perform more stably and ensure longer lifetime.

B450M
3 Graphics Outputs

Complete with all three types of most used connectors! Packed with a D-Sub + DVI-D + HDMI combo. Plus the HDMI port supports 4K resolution.
*Supported with A-Series APUs only.

B450M
Triple Monitor

Graphics, graphics and even more graphics! You've demanded for more eye candy, so this motherboard supports Triple Monitor. You may choose up to three display interfaces from the rear i/o to connect monitors and use them simultaneously without installing another graphics card.
*Supported with processors with integrated graphics only.

B450M
A-Tuning

A-Tuning is ASRock's multi purpose software suite with a new interface, more new features and improved utilities.

B450M
Full Spike Protection

Some sensitive digital components on the motherboard are vulnerable to power surges, 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.

B450M
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.


Learn more about the ASRock B450M PRO4

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details
  • Return Policies
    • Return for refund within: Non-refundable
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Replacement Only Return Policy.
Ownership: 1 month to 1 year
Verified Owner
5/ 5
No problems whatsoever after few months of use. 1/26/2020 1:39:50 PM

Pros: Easy setup. Ready for Ryzen 5 3600 out of the box.

Cons: Non so far.
Have to manually adjust - set the right DDR4 speed in BIOS settings in order to use maximum RAM speed.

Overall Review: Will recommend this product.

Did you find this review helpful?
Anonymous
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Good inexpensive mobo 1/23/2020 8:52:44 AM

Overall Review: Easy setup and ran into zero problems.

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
4/ 5
solid value 1/21/2020 9:16:34 AM

Pros: -functions well
-easily installed
-Bios up to date and set to manage AMD 3000 range.
-TMP function worked well.
-Good value for solid mid-level build

Cons: -Mail-in rebate window is VERY short, and asks for a lot of redundant steps (assume it's to trip you up).
-Plain design
-Hookups under video card slot are difficult to manage with larger cards.
-Plain/unimpressive RGB controller (Polychrome)
-Not sure if better boards set up connectors for better cable management, but this one had a couple that made connections awkward/cables sticking out all over despite best efforts.

Overall Review: I would say its' a solid mid range/value pc build mother board. Better if I actually get the mail in rebate, but it will take up to 16 weeks for me to find out if I missed one of the many steps. I managed to get all the parts and test bench the build with 1 day to spare to send in the codes (10 days from Newegg invoice). Seems a bit sketchy on their part.

It is running AMD 5 2600x with Team Force 3000 16 GB ram. Seems to work well-though I do not think the board could run faster timings/faster ram (think the limit is 2666 anyway).

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Nice Board 1/13/2020 7:36:12 AM

Pros: Plenty of I/O in mATX.
Plenty of PCI-e bandwidth for a single graphics card system, with support for 2.
Dual M.2 is a nice plus, even if one is 2x / SATA3.
Sturdy materials, didn't bend as much when plugging in power.
Came with BIOS 3.6, no need to borrow a chip to use Ryzen 3xxx
Ran G.Skill DDR4 3600 with no issue or tweaking. Just selected the speed and it worked.
Has plenty of thermal tweaks, fan controls and fan headers.

Cons: RGB software lacks the ability to use more than one color at a time on ARGB controller.
RGB software doesn't allow for a fully custom profile.

Overall Review: Overall very happy with this board.
Runs my 3600x and DDR4 3600 nicely.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Already Updated for Ryzen 3 1/12/2020 8:48:16 AM

Pros: +already updated for my Ryzen 5 3600
+Looks great
+Good value for the price
+Decent VRMs for overxlocking
+Good I/O
+Great manual

Cons: -none

Overall Review: I would 100% recommend this if you're looking for a budget board

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
1/ 5
Board Comes with Bios Update 3.6? Trouble for Gen 1 & 2 1/8/2020 5:42:13 AM

Pros: -Easy and quick install

Cons: -Took me almost 4 full days of troubleshooting to get it figured out
-Come with BIOS updated to 3.6 out of the box (No more Ryzen 5 Gen 2 support?)
-Diagram for RAM placement is very difficult to figure out. Should be simplified (i.e. Pinnacle cannot use slot A2)
-Cannot downgrade BIOS and Clearing CMOS appears to do nothing to reset BIOS.

Overall Review: Thought this board was faulty. The system would boot just fine then after about 20 minutes just crash out of nowhere. Spent 3 full days troubleshooting this thing and finally got lucky. Transferred parts to another board to test and all components worked fine. Uninstalled, reinstalled, flashed Bios, cleared CMOS (which did not work) tried another Ryzen set up with different parts with the same results. ASRock says not to update to the most recent BIOS 3.90, however, I have been so far been able to get this board to work with Ryzen 5 2600 and 16GB DDR4 3200 Mhz Ram. Watch the placement of the RAM! Pinnacle bridge likes the placements in A2 and B2. It does not like the A1 slot!

This is what I did (I had already tried flashing BIOS to 3.9 before this)...
1. Took the RAM out of the system
2. Unplugged all power and Press and Hold the power button to discharge system.
3. Took CMOS battery out of the board.
4. Cleared CMOS (doesn't appear to have worked but it was part of the process)
5. Let systems sit uncharged and without power for 1 hour.

The system has been stable for 24 hours currently with no crashing.

3 out of 5 people found this review helpful. Did you?
Manufacturer Response:
Dear Jason,

Thank you for purchase and review.
We will be more than happy to assist you for the BIOS flash back to previous version.
Please contact us at https://event.asrock.com/tsd.asp

Thank you

ASRock Support
Tech Support Email: https://event.asrock.com/tsd.asp
Anonymous
Ownership: 1 week to 1 month
Verified Owner
1/ 5
Motherboard locked my CPU at 0.54 ghz, Can't return it.. 1/7/2020 10:32:07 PM

Overall Review: Each time I start the PC after it was shutdown the CPU runs at 0.54 ghz and I have to restart through the OS just to get it to run at it's stock speeds. I didn't do any overclocking so this shouldn't be happening. This motherboard was working great for a couple of weeks before it started throttling.

1 out of 1 people found this review helpful. Did you?
Manufacturer Response:
Dear Valued ASRock Customer,

We sincerely apologize for any inconvenience this may have caused you.
Please trouble shoot the mainboard following and see if its address the issue.
• Unplug the ATX power.
• Clear the CMOS.
• Reseat the CPU and heatsink fan.
• Load the BIOS setting default.
• If possible, please test with another known good CPU or test this CPU on other system to verify.

If you have any technical support inquiry, please contact us at http://event.asrock.com/tsd.asp
We will assist you shortly.

Thank you

ASRock Support
Tech Support Email: http://event.asrock.com/tsd.asp
Ownership: 1 month to 1 year
Verified Owner
1/ 5
Motherboard incredibly unstable. 1/7/2020 4:46:07 PM

Overall Review: Installed motherboard on a new build and immediately it started crashing. Checked the memory configuration and was using B1 and B2 on 2133 hz on Pinacle Ridge as stated in manual as fine for SR. Crashed every 10 minutes. Switched to A2/B2 and decreased crashes to around three times/ week.

USB controllers immediately crash the PC (Wired/Wireless). Not all USB 2.0 connections work even though the case was used by a previous build just fine. USB 3.0 does not work at all. This may be the connector having issues but it’s too much of a coincidence.

I submitted the paperwork for a rebate that never showed up and that made this motherboard not returnable. I am unhappy to say the least with it. Any advice or return options ASRock?

0 out of 2 people found this review helpful. Did you?
Manufacturer Response:
Dear Jared,

We sincerely apologize for any inconvenience this may have caused you.
Please trouble shoot the mainboard following if is help.
• Unplug the ATX power.
• Clear the CMOS.
• Reseat the CPU and heatsink fan.
• Test with 1 x memory module, test wit another memory module if it same issue.
• Load the BIOS setting default.

For the USB ports, please test with USB keyboard and mouse in UEFI/BIOS to verify all USB ports are working.

If you have any technical support inquiry, please contact us at http://event.asrock.com/tsd.asp
We will assist you shortly.

Thank you

ASRock Support
Tech Support Email: http://event.asrock.com/tsd.asp
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