Asus PRIME B860M-A-CSM vs Prime B840M-A WiFi-CSM Motherboard Comparison

Asus PRIME B860M-A-CSM and ASUS Prime B840M-A WiFi-CSM are both motherboards with the same Form factor (Micro ATX), SATA 6 Gbps Ports (4) and RAM Slots (4). The main differences are in Socket, Chipset, Supported Memory and Wireless LAN.

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Asus PRIME B860M-A-CSM	ASUS Prime B840M-A WiFi-CSM
Prices (Change region) There are no offers available in your selected region. Other merchants are available in another region. In Stock Free shipping €117.03 In Stock Free shipping €146.35 In Stock Free shipping €146.42 In Stock Free shipping €154.72 In Stock + €4.99 Shipping €156.05 In Stock + €4.99 Shipping €156.08 In Stock Free shipping €164.00 Out of Stock Free shipping €170.87 Out of Stock + €4.99 Shipping €174.60 In Stock + €7.46 Shipping €176.24 Show 7 more offers	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 B860M-A-CSM	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 LGA1851	Socket AM5
Form factor Micro ATX	Form factor Micro ATX
Chipset Intel B860	Chipset AMD B840
Supported Memory DDR5 4800Mhz 8600Mhz	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 No	Wireless LAN Yes
Wi-Fi Generation -	Wi-Fi Generation 6E
PCI-Express x16 Slots 2	PCI-Express x16 Slots 3
PCI-Express x4 Slots 0	PCI-Express x4 Slots 0
PCI-Express x1 Slots 1	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 2	M.2 Ports 3
M.2 Devices support 2242 / 2260 / 2280 - M Key 2242 / 2260 / 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 256 GB	Maximum Supported RAM 192 GB
Onboard USB 2.0 1	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