We and our partners use cookies to give you the best online experience, including to personalise advertising and content. Data about your interaction with this site and the ads shown to you may be shared with companies involved in the delivery and/or personalisation of ads on this site and elsewhere online.

Compare 3 products

Close
ASRock B450 Steel Legend Motherboard
ASRock B450 Steel Legend
Close
ASRock B450M PRO4 Motherboard
ASRock B450M PRO4
Close
Asus Prime B450M-A Motherboard
Asus Prime B450M-A
Editiorial reviews
5
5 editorial reviews
The Steel Legend series of motherboards according to ASRock represents the philosophical state of rock-solid durability and irresistible aesthetics. It’s built around most demanding specs and features, providing high quality components and materials to ensure ...Read more
The ASRock B450M Steel Legend is quite highly recommended for a budget AM4 board, and we just took it upon ourselves to see how good it truly is.Read more
If you're looking for a feature-rich B450 motherboard under £100, the ASRock B450 Steel Legend may be the option for you. Check out what we thought....Read more
Read editorial reviews
2
2 editorial reviews
We kick off our AMD B450 chipset reviews with the ASRock B450M Pro4 mATX motherboard, a budget option for those wanting an entry into the world of AMD Ryzen CPUs....Read more
Conclusion and Verdict The B450M Pro4 motherboard is a really interesting option for gamers with a lower budget. It supports most new technologies, all AM4 processors, memory up to DDR4-3466, two M.2 SSD and many ...Read more
Read editorial reviews
1
1 editorial reviews
ASUS isn't always known for their bang for buck, but the ASUS PRIME B450M-K is a perfect example of it. Here's our review of this great entry-level board.Read more
Read editorial reviews
User rating
63
3.7 out of 5
63 user ratings
5 stars
23 %
4 stars
39 %
3 stars
25 %
2 stars
9 %
1 stars
1 %
52
3.9 out of 5
52 user ratings
5 stars
34 %
4 stars
30 %
3 stars
25 %
2 stars
9 %
1 stars
0 %
78
3.7 out of 5
78 user ratings
5 stars
24 %
4 stars
32 %
3 stars
30 %
2 stars
11 %
1 stars
1 %

General

Motherboard typeATXMicro-ATXMicro-ATX
Processor socketSocket AM4Socket AM4Socket AM4

Memory

Supported memory bus clock
  • 2400 MHz
  • 2133 MHz
  • 2667 MHz
  • 2933 MHz
  • 3200 MHz
  • 3466 MHz
  • 3533 MHz
  • 2400 MHz
  • 2133 MHz
  • 2667 MHz
  • 2933 MHz
  • 3200 MHz
  • 2400 MHz
  • 2133 MHz
  • 2666 MHz
  • 2800 MHz
  • 3000 MHz
  • 3200 MHz
RAM technologyDDR4DDR4DDR4
Memory slots typeDIMMDIMMDIMM
Maximum RAM size64 GB64 GB64 GB
Number of memory slots444
Unbuffered memoryyes
N/A
yes
Memory channelsDualDualDual
Non-ECCyes
N/A
N/A
ECC
N/A
N/A
yes

Audio properties

Audio codecRealtek ALC892Realtek ALC892Realtek ALC887
Audio output channels7.17.17.1

Technical details

Compatible processor seriesAMD AAMD RyzenAMD Ryzen
Maximum number of processors111
Maximum number of SMP processors1
N/A
1

BIOS

BIOS typeUEFI AMIUEFI AMIUEFI AMI
BIOS features
  • Multilingual BIOS
  • JumperFree
  • SMBIOS 2.3 support
  • UEFI BIOS
  • ACPI 5.1 support
  • Multilingual BIOS
  • JumperFree
  • SMBIOS 2.3 support
  • UEFI BIOS
  • ACPI 5.1 support
  • Multilingual BIOS
  • ASUS Quiet Thermal Solution
  • UEFI BIOS
  • ASUS EZ Flash 3
  • ACPI 6.1 support
  • SMBIOS 3.1 support
BIOS memory size128.0 mB128.0 mB128.0 mB
System Management BIOS (SMBIOS) version2.32.33.1
ACPI version5.15.16.1

Internal I/O ports

Number of COM connectors111
CPU fan connectoryesyesyes
12V power connectoryesyesyes
ATX Power connector (24-pin)YYY
TPM connectoryesyesyes
Number of SATA III connectors646
S/PDIF out connector
N/A
N/A
yes
Number of EATX power connectors
N/A
N/A
1
Number of chassis fan connectors
N/A
N/A
2
Front panel connector
N/A
N/A
yes

Rear panel I/O ports

S/PDIF out portyes
N/A
N/A
HDMI ports quantity111
HDMI version1.4
N/A
2.0b
Ethernet LAN (RJ-45) ports111
PS/2 ports quantity112
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity11
N/A
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity112
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity444
DisplayPorts quantity1
N/A
N/A
DisplayPort version1.2
N/A
N/A
VGA (D-Sub) ports quantity
N/A
11
DVI-D ports quantity
N/A
11

Network

Wi-Fino
N/A
N/A
Ethernet LAN (Network)yesyesyes
LAN controllerRealtek 8111HRealtek RTL8111HRealtek RTL8111H
Ethernet interface typeGigabit EthernetGigabit EthernetGigabit Ethernet

Dimensions

Width12.01 in9.61 in9.61 in
Depth9.61 in9.61 in9.45 in

Often compared with ASRock B450 Steel Legend

Often compared with ASRock B450M PRO4

Often compared with Asus Prime B450M-A