ASUS Prime B550M-A vs PRIME A320M-A Motherboard Comparison

ASUS Prime B550M-A and ASUS PRIME A320M-A are both motherboards with the same Socket (AM4), Form factor (Micro ATX) and PCI-Express x16 Slots (1). The main differences are in Chipset, Supported Memory, ECC RAM Support and M.2 Ports.

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ASUS Prime B550M-A

ASUS PRIME A320M-A

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$153.52

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Out of Stock

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$242.76

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Brand

ASUS

Brand

ASUS

Model

PRIME B550M-A
90MB14D0-M0AAY0
90MB14I0-M0EAY0

Model

PRIME A320M-A
90MB0VA0-M0EAY0

Release Date

📅 June 2020

Release Date

* First availability for purchase, it may not correspond to the actual market launch date.

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Compatible PC parts

Processors ► Memory ► Cases ► CPU Coolers ►

Compatible PC parts

Processors ► Memory ► Cases ► CPU Coolers ►

Socket

AM4

Socket

AM4

Form factor

Micro ATX

Form factor

Micro ATX

Chipset

AMD B550

Chipset

AMD A320

Supported Memory

DDR4

2133Mhz 2400Mhz 2666Mhz 2800Mhz 3000Mhz 3200Mhz 3466Mhz 3600Mhz 3866Mhz 4000Mhz 4400Mhz

Supported Memory

DDR4

2133Mhz 2400Mhz 2666Mhz 2933Mhz 3200Mhz

* 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

Yes
* ECC memory support also depends on the CPU memory controller

ECC RAM Support

SLI Support

CrossFire Support

RAID Support

Yes

RAID Support

Yes

Back Connect

Wireless LAN

PCI-Express x16 Slots

PCI-Express x4 Slots

PCI-Express x1 Slots

SATA 6 Gbps Ports

SATA Express Ports

M.2 Ports

M.2 Devices support

2242 / 2260 / 2280 / 22110 - M Key
2242 / 2260 / 2280 - M Key

M.2 Devices support

2242 / 2260 / 2280 - M Key

RAM Slots

Maximum Supported RAM

128 GB

Maximum Supported RAM

64 GB

Onboard USB 2.0

Onboard USB 3.2 Gen 1

Onboard USB 3.2 Gen 2

Onboard USB 3.2 Gen 2x2

Options (2)

	Micro ATX PRIME A320M-C R2.0 $94.26
	Micro ATX PRIME A320M-K $64.99

Comparison and key differences summary

Reasons to buy the ASUS Prime B550M-A:

37% cheaper, you can save $89.24
Supports the following RAM types: DDR4 3466MHz, 3600MHz, 3866MHz, 4000MHz, 4400MHz
+1 Ports M.2
+64 GB maximum RAM supported