GIGABYTE X399 AORUS PRO vs B550 AORUS PRO Motherboard Comparison

GIGABYTE X399 AORUS PRO and Gigabyte B550 AORUS PRO are both motherboards with the same Form factor (ATX), Audio Channels (2/4/5.1/7.1-channel, Support for S/PDIF Out) and Maximum Supported RAM (128 GB). The main differences are in Socket, Chipset, Supported Memory and Audio Chipset.

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GIGABYTE X399 AORUS PRO	Gigabyte B550 AORUS PRO
Prices (Change region) - Buy now	Prices (Change region) Out of Stock Free shipping $207.99 Out of Stock Free shipping $249.90 - Buy now
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Brand GIGABYTE	Brand Gigabyte
Model X399 AORUS PRO	Model B550 AORUS PRO
Release Date 📅 November 2018	Release Date 📅 June 2020
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews ★★★★☆ (7 reviews) Add a product review	User reviews ★★★★☆ (49 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 sTR4	Socket AM4
Form factor ATX	Form factor ATX
Chipset AMD X399	Chipset AMD B550
Supported Memory DDR4 2133Mhz 2400Mhz 2666Mhz 2800Mhz 2933Mhz 3200Mhz 3333Mhz 3466Mhz 3600Mhz	Supported Memory DDR4 2133Mhz 2400Mhz 2666Mhz 2933Mhz 3200Mhz 3333Mhz 3600Mhz 4000Mhz 4400Mhz 4600Mhz 4866Mhz 5000Mhz
* 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 Yes * ECC memory support also depends on the CPU memory controller
Audio Chipset Realtek ALC1220	Audio Chipset Realtek ALC1220-VB codec * The back panel line out jack supports DSD audio.
Audio Channels 2/4/5.1/7.1-channel Support for S/PDIF Out	Audio Channels 2/4/5.1/7.1-channel Support for S/PDIF Out
LAN Chipset Intel GbE LAN chip	LAN Chipset Realtek 2.5GbE LAN chip
Max LAN Speed 10/100/1000Mbps	Max LAN Speed 10/100/1000/2500Mbps
SLI Support Yes	SLI Support No
CrossFire Support Yes	CrossFire Support No
RAID Support Yes	RAID Support Yes
Back Connect No	Back Connect No
Back I/O Ports -	Back I/O Ports 1 x HDMI port 3 x USB 3.2 Gen 1 ports 1 x USB Type-C port with USB 3.2 Gen 2 support 2 x USB 3.2 Gen 2 Type-A ports (red) 6 x USB 2.0/1.1 ports 1 x Q-Flash Plus button 1 x RJ-45 port 1 x optical S/PDIF Out connector 5 x audio jacks
Wireless LAN No	Wireless LAN No
PCI-Express x16 Slots 5	PCI-Express x16 Slots 3
PCI-Express x4 Slots 0	PCI-Express x4 Slots 0
PCI-Express x1 Slots 0	PCI-Express x1 Slots 2
SATA 6 Gbps Ports 8	SATA 6 Gbps Ports 6
SATA Express Ports 0	SATA Express Ports 0
M.2 Ports 3	M.2 Ports 2
M.2 Devices support 2260 / 2280 / 22110 - M Key 2260 / 2280 / 22110 - M Key 2242 / 2260 / 2280 - M Key	M.2 Devices support 2242 / 2260 / 2280 / 22110 - M Key 2242 / 2260 / 2280 / 22110 - M Key
RAM Slots 8	RAM Slots 4
Maximum Supported RAM 128 GB	Maximum Supported RAM 128 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 0
Onboard USB 3.2 Gen 2x2 0	Onboard USB 3.2 Gen 2x2 0

Comparison and key differences summary

⛔ You are comparing motherboards with different sockets. They cannot support the same CPUs. Try to compare motherboards within the same platform.

Reasons to buy the GIGABYTE X399 AORUS PRO:

Supports NVIDIA SLI
Supports AMD CrossFire
+2 Slots PCI-E x16
+2 Ports SATA 6Gb/s
+1 Ports M.2
+4 RAM slots
+1 Onboard USB 3.2 Gen 2

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Reasons to buy the Gigabyte B550 AORUS PRO:

Newer Product, it was released around 20 months later
Supports the following RAM types: DDR4 4000MHz, 4400MHz, 4600MHz, 4866MHz, 5000MHz
+2 Slots PCI-E x1

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