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Extended ATX motherboard in dark finish with RGB lighting and TR4 socket area visible

ASUS

ASUS ROG STRIX X399-E GAMING AMD Motherboard B

SKU CH-6MRQ-S31D7

Extended ATX board with TR4 socket for Threadripper CPUs, supporting 128 GB DDR4 up to 3600 MHz and three PCIe x16 slots

  • ProcessorRyzen Series
  • ChipsetAMD X399
  • Form factorExtended ATX
  • CPU socketsTR4
  • Max supported RAM128 GB
  • PCIe x16 slots3 x PCI Express x16
  • Supports up to 128GB DDR4 memory for heavy multitasking
  • Three PCI Express x16 slots enable multi-GPU configurations
  • Extended ATX form factor provides extra expansion room
  • AMD X399 chipset unlocks Threadripper processor capabilities
  • RGB LED lighting adds customisable system aesthetics

Socket TR4 Extended ATX board for Threadripper

The ASUS ROG STRIX X399-E GAMING is an Extended ATX motherboard built on the AMD X399 chipset with an sTR4 socket for Ryzen Threadripper processors. It provides eight DDR4 DIMM slots supporting up to 128 GB of memory and three PCI Express x16 slots for multi-GPU or add-in cards. RGB lighting is integrated for system aesthetics.

Suits high-core-count workstations.

This board targets users building high-core-count workstations or enthusiast desktops that need quad-channel memory and extensive PCIe connectivity. The Extended ATX form factor requires a compatible chassis, so builders with smaller cases should look elsewhere. The package includes only the motherboard itself, so anyone needing an I/O shield, SATA cables or other accessories must source them separately.

128 GB maximum memory capacity

The single specification that decides fit is the 128 GB maximum memory supported across eight DDR4 slots at speeds up to 3600 MHz overclocked. If your workload demands more memory than this limit, this motherboard will not meet the requirement.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $244.99
Typical for this category: the median of 1,906 items is $224.49.

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Specifications

Product
Brand nameASUS
Product lineROG
Model nameROG STRIX X399-E GAMING
Processor
ProcessorRyzen Series
CPU socketsTR4
ChipsetAMD X399
Memory
Max supported RAM128 GB
Ports & slots
PCIe x16 slots3 x PCI Express x16
PCI slots3 x PCI Slots
Size & build
Form factorExtended ATX
More details
LightingRGB

Questions about this item

Will the TR4 socket on this board accept the Threadripper CPU I already own?

The board uses the sTR4 socket for 1st and 2nd Gen AMD Ryzen Threadripper processors; check the ASUS CPU support list for your exact model.

How can I verify the RGB lighting is functioning once the system posts?

The board includes on-board RGB LED lighting; use the ASUS Aura software in Windows to confirm the LEDs respond to colour and effect changes.

Does the box include an I/O shield, SATA cables or a driver disc?

This is a motherboard-only sale in an anti-static bag and plain box; I/O shield, SATA cables, Wi-Fi antenna, driver disc and manual are not included.

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