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Brand
ASRock
Brand
ASRock
Model
A320M Pro4
Model
B550M PRO4
Release Date
📅 August 2018
Release Date
📅 June 2020
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
User reviews
★★★★☆
(20 reviews)
Price history
View Details ►
Price history
View Details ►
Compatible PC parts
Compatible PC parts
Series
Series
-
Socket
AM4
Socket
AM4
Form factor
Micro ATX
Form factor
Micro ATX
Chipset
AMD A320
Chipset
AMD B550
Supported Memory
DDR4
2133Mhz
2400Mhz
2666Mhz
2933Mhz
3200Mhz
Supported Memory
DDR4
2133Mhz
2400Mhz
2666Mhz
2933Mhz
3200Mhz
3466Mhz
3600Mhz
3733Mhz
3800Mhz
3866Mhz
4000Mhz
4133Mhz
4200Mhz
4266Mhz
4333Mhz
4400Mhz
4533Mhz
* 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
No
ECC RAM Support
Yes
* ECC memory support also depends on the CPU memory controller
Audio Chipset
Realtek ALC892
Audio Chipset
Realtek ALC1200
Audio Channels
7.1 Channels
Audio Channels
7.1 Channels
LAN Chipset
Realtek 8111GR
LAN Chipset
Realtek RTL8111H
Max LAN Speed
10/100/1000Mbps
Max LAN Speed
10/100/1000Mbps
SLI Support
No
SLI Support
No
CrossFire Support
No
CrossFire Support
Yes
RAID Support
Yes
RAID Support
Yes
Back Connect
No
Back Connect
No
Back I/O Ports
-
Back I/O Ports
Antenna Bracket
1 x PS/2 Mouse/Keyboard Port
1 x D-Sub Port
1 x HDMI Port
1 x DisplayPort 1.4
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)
HD Audio Jacks: Line in / Front Speaker / Microphone
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
4
SATA 6 Gbps Ports
6
SATA Express Ports
0
SATA Express Ports
0
M.2 Ports
2
M.2 Ports
3
M.2 Devices support
2242 / 2260 / 2280 - M Key
2230 / 2242 / 2260 / 2280 - M Key
M.2 Devices support
2280 - M Key
2280 - M Key
2230 - E Key
RAM Slots
4
RAM Slots
4
Maximum Supported RAM
64 GB
Maximum Supported RAM
128 GB
Onboard USB 2.0
2
Onboard USB 2.0
2
Onboard USB 3.2 Gen 1
1
Onboard USB 3.2 Gen 1
2
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
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