MSI PRO Z790-A WIFI vs PRO B850M-A WiFi Motherboard Comparison

MSI PRO Z790-A WIFI and MSI PRO B850M-A WiFi are both motherboards with the same PCI-Express x1 Slots (1), RAM Slots (4) and Onboard USB 3.2 Gen 1 (1). The main differences are in Socket, Form factor, Chipset and Supported Memory.

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MSI PRO Z790-A WIFI	MSI PRO B850M-A WiFi
Prices (Change region) In Stock + $29.99 Shipping $250.01	Prices (Change region) In Stock $139.99 Last updated 39 minutes ago. In Stock Free shipping $139.99 In Stock Free shipping $166.99 In Stock + $5.99 Shipping $166.99 In Stock $183.49 Show 2 more offers
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Brand MSI	Brand MSI
Model PRO Z790-A WIFI	Model PRO B850M-A WIFI
Release Date 📅 October 2022	Release Date 📅 June 2025
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews ★★★★★ (1 reviews) Add a product review
Price history View Details ►	Price history View Details ►
Compatible PC parts Processors ► Memory ► Cases ► CPU Coolers ►	Compatible PC parts Processors ► Memory ► Cases ► CPU Coolers ►
Socket LGA1700	Socket AM5
Form factor ATX	Form factor Micro ATX
Chipset Intel Z790	Chipset AMD B850
Supported Memory DDR5 4800Mhz 5000Mhz 5200Mhz 5400Mhz 5600Mhz 5800Mhz 6000Mhz 6200Mhz 6400Mhz 6600Mhz 6800Mhz 7000Mhz	Supported Memory DDR5 4800Mhz 6000Mhz 6400Mhz 8200Mhz 8600Mhz
* 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 No
Audio Chipset Realtek ALC4080	Audio Chipset ALC897
Audio Channels 7.1 Channels	Audio Channels 8-Channel (7.1) HD Audio with Audio Boost
LAN Chipset 1x Intel 2.5Gbps LAN controller	LAN Chipset Realtek® 8126 5G LAN
Max LAN Speed 2.5Gbps	Max LAN Speed -
SLI Support No	SLI Support No
CrossFire Support No	CrossFire Support No
RAID Support Yes	RAID Support No
Back Connect No	Back Connect No
Back I/O Ports 1x DisplayPort 1x HDMI port 1x Flash BIOS button 2x USB 2.0 Type-A ports (From Hub GL850G) 2x USB 3.2 Gen1 5Gbps Type-A ports (From Z790 chipset) 1x LAN I225V port 3x USB 3.2 Gen 2 10Gbps Type-A ports (From Z790 chipset) 1x USB 3.2 Gen 2x2 20Gbps Type-C port (From Z790 chipset) 2x Wi-Fi Antenna connectors 5x Audio jacks 1x Optical S/PDIF Out connector	Back I/O Ports -
Wireless LAN Yes	Wireless LAN Yes
Wi-Fi Generation 6E	Wi-Fi Generation 7
PCI-Express x16 Slots 3	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 5	M.2 Ports 2
M.2 Devices support 2242 / 2260 / 2280 / 22110 - M Key 2242 / 2260 / 2280 - M Key 2242 / 2260 / 2280 - M Key 2242 / 2260 / 2280 - M Key 2230 - E Key	M.2 Devices support 2260 / 2280 - M Key 2260 / 2280 - M Key
RAM Slots 4	RAM Slots 4
Maximum Supported RAM 192 GB	Maximum Supported RAM 128 GB
Onboard USB 2.0 2	Onboard USB 2.0 0
Onboard USB 3.2 Gen 1 1	Onboard USB 3.2 Gen 1 1
Onboard USB 3.2 Gen 2 1	Onboard USB 3.2 Gen 2 1
Onboard USB 3.2 Gen 2x2 0	Onboard USB 3.2 Gen 2x2 0