ASRock B850M Pro-A Motherboard

ASRock B850M Pro-A AM5 Micro ATX

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ASRock B850M Pro-A AM5 AMD B850 SATA 6Gb/s Micro ATX Motherboard Number of Memory Slots: 4x288pin (DDR5) Memory Standard: Up to 8000+(OC) Audio Chipset: Realtek ALC897 Audio Channels: 7.1 Channels Max LAN Speed: 2.5Gbps Maximum Memory Supported: 256GB Channel Supported: Dual Channel CPU Type: Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series

Model	B850M Pro-A
Release Date	January 2025 * First availability for purchase, it may not correspond to the actual market launch date.
Socket	AM5
Form factor	Micro ATX
Chipset	AMD B850
Supported Memory	DDR5 4400Mhz 4800Mhz 5200Mhz 5600Mhz 6000Mhz 6200Mhz 6400Mhz 6600Mhz 6800Mhz 7000Mhz 7200Mhz 7600Mhz 7800Mhz 8000Mhz View compatible RAM ► * 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
Audio Chipset	Realtek ALC897
Audio Channels	7.1 Channels
LAN Chipset	Dragon RTL8125BG
Max LAN Speed	2.5Gbps
SLI Support	No
CrossFire Support	No
RAID Support	Yes
Back Connect	No
Back I/O Ports	2 x Antenna Mounting Points 1 x HDMI Port 1 x DisplayPort 1.4 1 x USB 3.2 Gen2 Type-A Port (10 Gb/s) 1 x USB 3.2 Gen2 Type-C Port 2 x USB 3.2 Gen1 Ports 4 x USB 2.0 Ports 1 x RJ-45 LAN Port 1 x BIOS Flashback Button HD Audio Jacks: Line in / Front Speaker / Microphone
Wireless LAN	No
PCI-Express x16 Slots	1
PCI-Express x4 Slots	1
PCI-Express x1 Slots	0
SATA 6 Gbps Ports	4
SATA Express Ports	0
M.2 Ports	4
M.2 Devices support	2280 - M Key 2280 - M Key 2280 - M Key 2230 - E Key
RAM Slots	4
Maximum Supported RAM	256 GB
Onboard USB 2.0	2
Onboard USB 3.2 Gen 1	2
Onboard USB 3.2 Gen 2	1
Onboard USB 3.2 Gen 2x2	0

	Old Name	Current Name	Branding	Data Speed	Port
USB 2.0	USB 2.0	USB 2.0	Hi-Speed USB	480 Mbit/s	diverse
USB 3.0	USB 3.1 Gen 1	USB 3.2 Gen 1x1	SuperSpeed USB	5 Gbit/s	diverse
USB 3.1	USB 3.1 Gen 2	USB 3.2 Gen 2x1	SuperSpeed USB 10Gbps	10 Gbit/s	diverse
USB 3.2	USB 3.2 Gen 2x2	USB 4.0 Gen 2x2	USB4 20Gbps	20 Gbit/s	only USB-C
USB4	USB 4.0 Gen 3x2	USB4 1.0	USB4 40Gbps	40 Gbit/s	only USB-C
USB4v2	USB 4.0 Gen 4	USB4 2.0	USB4 80Gbps	80-120 Gbit/s	only USB-C