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ASRock - B450M PRO4 Micro ATX AM4 Motherboard

( 4.0 Average / 7 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
Bytes At Work €82.00 +€4.95 s/h €86.95

Price History (Excluding Tax) History:


aferr1973 27 points 5 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So I didn't want to deal with the possibility of my CPU not booting with a B350 motherboard due to an outdated bios needing flashing with the 2nd generation Ryzen CPUs.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 5 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 26 points 4 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 3 months ago

Not the greatest, and I definitely overpaid

midegg 23 points 2 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 13 points 2 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 1 month 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.