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ASRock - B450M PRO4 Micro ATX AM4 Motherboard

( 4.1 Average / 14 Ratings )




Part #

B450M PRO4


Black / Silver

Form Factor

Micro ATX

CPU Socket



AMD B450

Memory Slots

4 x 288-pin DIMM

Memory Type

DDR4-2133 / 2400 / 2666 / 2933 / 3200

Maximum Supported Memory

64 GB

RAID Support


Onboard Video

Depends on CPU

CrossFire Support


SLI Support


SATA 6 Gb/s


Onboard Ethernet

1 x 1000 Mbit/s

Onboard USB 3.0 Header(s)


Completed Builds Using This Part

See All Completed Builds


Merchant Base Promo Shipping Tax Availability Total
Vuugo $109.90 -$20.00 In stock $89.90+
$20.00 mail-in rebate
Newegg Canada $113.55 In stock $113.55+
Amazon Canada $129.99 In stock $129.99+
( 7 new from $129.99. Last updated 5 hours ago. )
Newegg Canada Marketplace $171.58 $171.58+
* Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.ca at the time of purchase will apply to the purchase of this product.

Price History (Excluding Tax) History:


aferr1973 27 points 8 months ago

So I didn't want to deal with the possibility of my CPU not booting with a B350 motherboard due to an outdated bios needing flashing with the 2nd generation Ryzen CPUs. Being that the only extra CPUs that I have laying around are old AMD Athlons I decided to go with a B450 motherboard so that I wouldn't need to worry about any compatibility out of the box with Ryzen 2nd gen CPUs. No I wasn't going to deal with an AMD boot kit as I need to have things instantly! I am very disappointed with this ASRock bios as it is not very feature rich. I am also very disappointed with the memory compatibility which I will get to under the memory review. I hope that future bios releases will up the features of this bios and expand the memory compatibility.

JayFragz 11 points 8 months ago
from completed build Black Eye V2

So far, so good. It's got a bunch of Fan connectors, a solid VRM, and significantly improved software from my old AsRock 970 board.

andy_fu 31 points 7 months ago
from completed build ⚡ ⚡ ⚡

Nothing wrong with this, but the support for this mobo is unbelievable. The issue is that I couldn't set my ram to its advertised speed even with XMP profile on and I couldn't change the ram voltage for some reasons. I emailed Asrock a week ago and haven't heard back and I couldn't find anything online. Another thing to keep in mind, if you are using a m.2 ssd, the bottom m.2 slot is the only slot that supports that, the top slot is for Nvme.

miller.eric79@yahoo.com 7 points 6 months ago

Not the greatest, and I definitely overpaid

midegg 23 points 6 months ago
from completed build Party for 1

Think it looks cool. Not sure about the VRMs and stuff but allowed me to overclock my Ryzen 5 2600 to 4.1 Ghz at 1.3625v. Has all the ports and stuff I need. No RGB, which i appreciated.

RjCascher 14 points 5 months ago
from completed build $500 "Konsole Killer"

Nice AM4 motherboard. Definitely worth it if you can get it on sale for around $65. It's also got some nice features that other micro-ATX B450 boards don't.

FalconEye36 5 points 5 months ago
from completed build Falcon Mk. 1

Great, cheap motherboard. I've had no issues with it and I love the BIOS - everything is logically placed and it is easy to navigate. Having three fan headers is awesome.

zabby23 1 point 3 months ago
from completed build AMD MicroATX Build

Good board. Decent IO, 4 Dimm slots, two m.2 slots (Only the Ultra M.2 supports NVME) Good BIOS Easy to understand. Looks good.

TaylorC2002 7 points 1 month ago
from completed build Core v21 Ryzen Build

Has a fantastic VRM, but the bios could be better.

TaylorC2002 3 points 1 month ago
from completed build Core X2 Ryzen Build

Great motherboard overall, but the bios could use some work.