Asus PRIME B840M-A WIFI vs Prime B840M-A WiFi-CSM Motherboard Comparison

Asus PRIME B840M-A WIFI and ASUS Prime B840M-A WiFi-CSM are both motherboards with the same Socket (AM5), Form factor (Micro ATX) and Chipset (AMD B840). The main differences are in Supported Memory.

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Asus PRIME B840M-A WIFI	ASUS Prime B840M-A WiFi-CSM
Prices (Change region) In Stock Free shipping $238.99	Prices (Change region) In Stock $179.99 In Stock Free shipping $179.99 In Stock + $2.99 Shipping $183.99 Out of Stock Free shipping $200.80 In Stock $201.99 Show 2 more offers
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Brand Asus	Brand ASUS
Model PRIME B840M-A WIFI 90MB1J20-M0EAY0	Model PRIME B840M-A WIFI-CSM 90MB1J20-MVAAYC
Release Date 📅 January 2025	Release Date 📅 January 2025
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User 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 AM5	Socket AM5
Form factor Micro ATX	Form factor Micro ATX
Chipset AMD B840	Chipset AMD B840
Supported Memory DDR5 6400Mhz 6600Mhz 6800Mhz 7200Mhz 7600Mhz	Supported Memory DDR5 4400Mhz 7600Mhz
* 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 Channels -	Audio Channels Realtek 7.1 Surround Sound High Definition Audio CODEC
Max LAN Speed -	Max LAN Speed 2.5Gbps
SLI Support No	SLI Support No
CrossFire Support No	CrossFire Support No
RAID Support Yes	RAID Support Yes
Back Connect No	Back Connect No
Back I/O Ports -	Back I/O Ports 2 x USB 10Gbps ports (2 x Type-A) 1 x USB 5Gbps port (1 x USB Type-C) 4 x USB 2.0 ports (4 x Type-A) 2 x DisplayPort 1 x HDMI port 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack button
Wireless LAN Yes	Wireless LAN Yes
Wi-Fi Generation 6E	Wi-Fi Generation 6E
PCI-Express x16 Slots 3	PCI-Express x16 Slots 3
PCI-Express x4 Slots 0	PCI-Express x4 Slots 0
PCI-Express x1 Slots 0	PCI-Express x1 Slots 0
SATA 6 Gbps Ports 4	SATA 6 Gbps Ports 4
SATA Express Ports 0	SATA Express Ports 0
M.2 Ports 3	M.2 Ports 3
M.2 Devices support 2280 - M Key 2242 / 2260 / 2280 - M Key 2280 - M Key	M.2 Devices support 2280 - M Key 2242 / 2260 / 2280 - M Key 2280 - M Key
RAM Slots 4	RAM Slots 4
Maximum Supported RAM 192 GB	Maximum Supported RAM 192 GB
Onboard USB 2.0 2	Onboard USB 2.0 2
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