ASRock B450M PRO4 R2.0 vs ASUS M5A99X EVO R2.0 Motherboard Comparison

ASRock B450M PRO4 R2.0 and ASUS M5A99X EVO R2.0 are both motherboards with the same 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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ASRock B450M PRO4 R2.0	ASUS M5A99X EVO R2.0
Prices (Change region) In Stock Free shipping $125.88 - Buy now	Prices (Change region) Out of Stock Free shipping $149.99 - Buy now
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Pangoly Score (How do we rate?) -	Pangoly Score (How do we rate?) 83
Brand ASRock	Brand ASUS
Model B450M PRO4 R2.0	Model M5A99X EVO R2.0 M5A99X-EVO-R2
Release Date 📅 April 2022	Release Date 📅 May 2012
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews ★★★★★ (100 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 ►
Pros -	Pros Nvidia SLI and AMD CrossFire support Easy to overclock
Cons -	Cons PCI-e slots limited to x8/x8 when running dual graphics cards
Socket AM4	Socket AM3+
Form factor Micro ATX	Form factor ATX
Chipset AMD B450	Chipset AMD 990X
Supported Memory DDR4 2133Mhz 2400Mhz 2666Mhz 2933Mhz 3200Mhz	Supported Memory DDR3 1066Mhz 1333Mhz 1600Mhz 1866Mhz 2133Mhz
* 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 ALC892/897	Audio Chipset -
Audio Channels 7.1 CH HD Audio with Content Protection Supports Surge Protection	Audio Channels -
LAN Chipset Realtek RTL8111H	LAN Chipset -
Max LAN Speed 1Gbps	Max LAN Speed -
SLI Support No	SLI Support Yes
CrossFire Support Yes	CrossFire Support Yes
RAID Support Yes	RAID Support Yes
Back Connect No	Back Connect No
Back I/O Ports 1 x PS/2 Mouse/Keyboard Port 1 x D-Sub Port 1 x DVI-D Port 1 x HDMI Port 2 x USB 2.0 Ports (Supports ESD Protection) 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 (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	Back I/O Ports -
Wireless LAN No	Wireless LAN No
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 2
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 0
M.2 Devices support 2242 / 2260 / 2280 - M Key 2230 / 2242 / 2260 / 2280 - M Key	M.2 Devices support -
RAM Slots 4	RAM Slots 4
Maximum Supported RAM 128 GB	Maximum Supported RAM 32 GB
Onboard USB 2.0 2	Onboard USB 2.0 3
Onboard USB 3.2 Gen 1 1	Onboard USB 3.2 Gen 1 1
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