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ASRock B550M STEEL LEGEND vs B450M Steel Legend

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Brand
ASRock
Brand
ASRock
Model
  • B550M STEEL LEGEND
  • 90-MXBCU0-A0UAYZ
Model
  • B450M STEEL LEGEND
  • 90-MXB9Y0-A0UAYZ
Release Date
📅 June 2020
Release Date
📅 February 2019
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
★★★★★
(3 reviews)
User reviews
★★★★☆
(40 reviews)
Price history
View Details ►
Price history
View Details ►
Supported PC parts
Supported PC parts
Socket
AM4
Socket
AM4
Form factor
Micro ATX
Form factor
Micro ATX
Chipset
AMD B550
Chipset
AMD B450
Supported Memory
DDR4
2133Mhz 2400Mhz 2666Mhz 2933Mhz 3200Mhz 3466Mhz 3600Mhz 3733Mhz 3800Mhz 3866Mhz 4000Mhz 4133Mhz 4200Mhz 4266Mhz 4333Mhz 4400Mhz 4533Mhz
Supported Memory
DDR4
2133Mhz 2400Mhz 2666Mhz 2933Mhz 3200Mhz
* High clock speeds may require enabling the XMP profile in the motherboard BIOS
** RAM support may also depend on the CPU memory controller
ECC RAM Support

* ECC memory support also depends on the CPU memory controller
ECC RAM Support
Audio Chipset
Realtek ALC1200
Audio Chipset
Realtek ALC892
Audio Channels
7.1 Channels
Audio Channels
7.1 Channels
LAN Chipset
Dragon RTL8125BG
LAN Chipset
Realtek RTL8111H
Max LAN Speed
10/100/1000/2500Mbps
Max LAN Speed
10/100/1000Mbps
SLI Support
No
SLI Support
No
CrossFire Support
Yes
CrossFire Support
Yes
RAID Support
Yes
RAID Support
Yes
Back I/O Ports
  • 2 x Antenna Ports (on I/O Panel Shield)
  • 1 x PS/2 Mouse/Keyboard Port
  • 1 x HDMI Port
  • 1 x DisplayPort 1.4
  • 1 x Optical SPDIF Out Port
  • 1 x USB 3.2 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)
  • 1 x USB 3.2 Gen2 Type-C Port (10Gb/s) (Supports ESD Protection)
  • 4 x USB 3.2 Gen1 Ports (ASMedia ASM1074 hub) (Supports ESD Protection)
  • 2 x USB 2.0 Ports (Supports ESD Protection)
  • 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
  • 1 x Clear CMOS Button
  • HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)
Back I/O Ports
  • 1 x PS/2 Mouse/Keyboard Port
  • 1 x HDMI Port
  • 1 x DisplayPort 1.2
  • 1 x Optical SPDIF Out Port
  • 2 x USB 2.0 Ports (Supports ESD Protection)
  • 1 x USB 3.2 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection)
  • 1 x USB 3.2 Gen2 Type-C Port (10Gb/s) (Supports ESD Protection)
  • 4 x USB 3.2 Gen1 Ports (Supports ESD Protection)
  • 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
  • HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)
Wireless LAN
No
Wireless LAN
No
PCI-Express x16 Slots
2
PCI-Express x16 Slots
2
PCI-Express x4 Slots
0
PCI-Express x4 Slots
0
PCI-Express x1 Slots
1
PCI-Express x1 Slots
1
SATA 6 Gbps Ports
6
SATA 6 Gbps Ports
4
SATA Express Ports
0
SATA Express Ports
0
M.2 Ports
3
M.2 Ports
2
M.2 Devices support
  • 2280 - M Key
  • 2280 - M Key
  • 2230 - E Key
M.2 Devices support
  • 2242 / 2260 / 2280 - M Key
  • 2242 / 2260 / 2280 - M Key
RAM Slots
4
RAM Slots
4
Maximum Supported RAM
128 GB
Maximum Supported RAM
128 GB
Onboard USB 2.0
2
Onboard USB 2.0
2
Onboard USB 3.2 Gen 1
2
Onboard USB 3.2 Gen 1
1
Onboard USB 3.2 Gen 2
0
Onboard USB 3.2 Gen 2
0
Onboard USB 3.2 Gen 2x2
0
Onboard USB 3.2 Gen 2x2
0

What are the differences between ASRock B550M STEEL LEGEND and B450M Steel Legend? Analyze head-to-head all specifications and features to find out the better motherboard.

Comparison and key differences summary

Reasons to pick the ASRock B550M STEEL LEGEND:

  • Newer Product, it was released around 16 months later.
  • Supports the following RAM types: DDR4 3466MHz, 3600MHz, 3733MHz, 3800MHz, 3866MHz, 4000MHz, 4133MHz, 4200MHz, 4266MHz, 4333MHz, 4400MHz, 4533MHz
  • +2 Ports SATA 6Gb/s.
  • +1 Ports M.2.
  • +1 Onboard USB 3.2 Gen 1.

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Reasons to pick the ASRock B450M Steel Legend:

  • 13% cheaper, you can save $15.58.

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