ASRock Fatal1ty X399 PROFESSIONAL GAMING vs Fatal1ty Z270 Gaming K4 Motherboard Comparison

ASRock Fatal1ty X399 PROFESSIONAL GAMING and ASRock Fatal1ty Z270 Gaming K4 are both motherboards with the same Form factor (ATX), Audio Chipset (Realtek ALC1220) and Audio Channels (7.1 Channels). The main differences are in Socket, Chipset, Supported Memory and ECC RAM Support.

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ASRock Fatal1ty X399 PROFESSIONAL GAMING	ASRock Fatal1ty Z270 Gaming K4
Prices (Change region) Out of Stock Free shipping $399.99 - Buy now	Prices (Change region) Out of Stock Free shipping $239.99 - Buy now
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Pangoly Score (How do we rate?) -	Pangoly Score (How do we rate?) 87
Brand ASRock	Brand ASRock
Model X399 Professional Gaming Fatal1ty X399 Professional Gaming 90-MXB5Q0-A0UAYZ	Model Fatal1ty Z270 Gaming K4 Z270 Gaming K4
Release Date -	Release Date 📅 January 2017
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews ★★★☆☆ (63 reviews) Add a product review	User reviews ★★★☆☆ (10 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 ►
Series Fatal1ty	Series Fatal1ty
Socket sTR4	Socket LGA1151
Form factor ATX	Form factor ATX
Chipset AMD X399	Chipset Intel Z270
Supported Memory DDR4 2133Mhz 2400Mhz 2666Mhz 2933Mhz 3200Mhz 3600Mhz	Supported Memory DDR4 2133Mhz 2400Mhz 2800Mhz 2933Mhz 3200Mhz 3600Mhz 3733Mhz
* 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 No
Audio Chipset Realtek ALC1220	Audio Chipset Realtek ALC1220
Audio Channels 7.1 Channels	Audio Channels 7.1 Channels
LAN Chipset AQUANTIA AQC107	LAN Chipset Intel I219-V
Max LAN Speed 10Gbps + 2 x 1Gbps	Max LAN Speed 10/100/1000Mbps
SLI Support Yes	SLI Support No
CrossFire Support Yes	CrossFire Support Yes
RAID Support Yes	RAID Support Yes
Back Connect No	Back Connect No
Back I/O Ports 2 x Antenna Ports 1 x PS/2 Mouse/Keyboard Port 1 x Optical SPDIF Out Port 1 x USB 3.1 Gen2 Type-A Port (10Gb/s) (Supports ESD Protection) 1 x USB 3.1 Gen2 Type-C Port (10Gb/s) (Supports ESD Protection) 8 x USB 3.1 Gen1 Ports (Supports ESD Protection) 3 x RJ-45 LAN Ports with LED (ACT/LINK LED and SPEED LED) 1 x BIOS Flashback Switch HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks) * Ultra USB Power is supported on USB3_6 port. * ACPI wake-up function is not supported on USB3_6 port. * 1 x Fatal1ty Mouse Port (USB 3.1 Gen1) is included.	Back I/O Ports -
Wireless LAN Yes	Wireless LAN No
Wi-Fi Generation 5	Wi-Fi Generation -
PCI-Express x16 Slots 4	PCI-Express x16 Slots 2
PCI-Express x4 Slots 0	PCI-Express x4 Slots 0
PCI-Express x1 Slots 1	PCI-Express x1 Slots 4
SATA 6 Gbps Ports 8	SATA 6 Gbps Ports 6
SATA Express Ports 0	SATA Express Ports 0
M.2 Ports 4	M.2 Ports 3
M.2 Devices support 2242 / 2260 / 2280 - M Key 2242 / 2260 / 2280 - M Key 2230 / 2242 / 2260 / 2280 - M Key 2230 - E Key	M.2 Devices support 2242 / 2260 / 2280 - M Key 2242 / 2260 / 2280 - M Key 2230 - E Key
RAM Slots 8	RAM Slots 4
Maximum Supported RAM 128 GB	Maximum Supported RAM 64 GB
Onboard USB 2.0 2	Onboard USB 2.0 3
Onboard USB 3.2 Gen 1 2	Onboard USB 3.2 Gen 1 2
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