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ASRock X99 Extreme6 ATX motherboard, black PCB with silver heatsinks and blue slots

ASRock

ASRock X99 Extreme6 LGA 2011-v3 Intel motherboard

SKU CH-HGW7-M0T79

ATX board with LGA 2011-v3 socket, eight DDR4 slots for up to 128 GB quad-channel memory, three PCIe 3.0 x16 slots, ten SATA 6Gb/s ports, one Ultra M.2 socket.

  • CPU socketLGA 2011-v3
  • ChipsetIntel X99
  • Form factorATX
  • Memory slot count8 × 288pin (DDR4)
  • Supported memoryDDR4 3000+(OC) / 2933+(OC) / 2800(OC) / 2400(OC) / 2133 / 18
  • Max supported RAM128 GB
  • Supports 128GB DDR4 across eight slots for large workloads
  • Quad-channel memory architecture increases bandwidth for demanding applications
  • Three PCI Express 3.0 x16 slots enable multi-GPU configurations
  • Ultra M.2 socket delivers up to 32Gb/s for fast storage
  • Dual Gigabit LAN with Intel and Qualcomm Atheros controllers provides redundant networking

LGA 2011-v3 workstation foundation

The ASRock X99 Extreme6 is an ATX motherboard built around the Intel X99 chipset for Core i7 processors in the LGA 2011-v3 socket. It targets content creators and engineers who need quad-channel memory bandwidth and multi-GPU expansion in a single board. Eight DDR4 slots and three full-length PCI Express 3.0 x16 slots give the platform room to scale.

128 GB DDR4 capacity with quad-channel headroom

Eight 288-pin slots support up to 128 GB of DDR4 running at speeds from 1066 to 3000+(OC) in quad-channel mode. The board handles large datasets and virtual machines comfortably, but memory bandwidth saturates at the controller limits of the X99 platform. Overclocked modules above 2400 require a CPU with a strong memory controller and careful voltage tuning.

PCI Express 3.0 and SATA 6 Gb/s interface limits

Three PCI Express 3.0 x16 slots operate at x16, x16 and x8 with a 40-lane CPU; a 28-lane CPU drops them to x16, x8, x4 and disables three-way SLI. Two PCI Express 2.0 x1 slots and one mini-PCI Express slot add peripheral connectivity. Ten SATA 6 Gb/s ports and one Ultra M.2 socket (Gen3 x4, 32 Gb/s) provide storage throughput capped by the chipset’s lane allocation and the SATA 6 Gb/s ceiling.

How it compares

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

Price $190.99
Pricier than about 81% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASRock
Model nameX99 Extreme6
Processor
CPU socketLGA 2011-v3
ChipsetIntel X99
Memory
Memory slot count8 × 288pin (DDR4)
Supported memoryDDR4 3000+(OC) / 2933+(OC) / 2800(OC) / 2400(OC) / 2133 / 1866 / 1600 / 1333 / 1066
Max supported RAM128 GB
Memory channelsQuad Channel
Storage
SATA ports10 x SATA 6Gb/s
M.2 slots1 x Ultra M.2 Socket, supports M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen3 x4 (32 Gb/s)
SATA and RAID supportRAID 0, RAID 1, RAID 5, RAID 10 and Intel Rapid Storage 13
Graphics
Onboard video chipNone
Audio & video
Audio chipRealtek ALC1150
Sound channels7.1 Channels
Connectivity
Ethernet controller1 x Intel I218 V (Gigabit LAN PHY 10/100/1000 Mb/s)
Second LAN controller1 x Qualcomm? Atheros AR8171 (PCIE x1 Gigabit LAN 10/100/1000 Mb/s)
Maximum network speed2 × 1 Gbit/s
Ports & slots
PCIe x1 slots2 x PCI Express 2.0 x1 Slots
Mini card slots1 x mini-PCI Express Slot
PS/2 ports1 x PS/2 keyboard/mouse port
Ethernet port2 x RJ-45 LAN Ports with LED (ACT/LINK LED and SPEED LED)
USB 3.0 ports4 x USB 3.0 Ports (ASMedia ASM1074 hub) (Supports ESD Protection (ASRock Full Spike Protection))
2 x USB 3.0 Ports (ASMedia ASM1042) (Supports ESD Protection (ASRock Full Spike Protection))
USB 2.0 ports2 x USB 2.0 Ports (Supports ESD Protection (ASRock Full Spike Protection))
S/PDIF output1 x Optical
Audio jacksHD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone
Onboard USB headers4 x USB 3.0 + 4 x USB 2.0
Power
Power connectors24 Pin
Size & build
Form factorATX
In the box
In the box1 x ASRock SLI_Bridge_2S Card
1 x ASRock 3-Way SLI-2S1S Bridge Card
Quick Installation Guide, Support CD, I/O Shield
4 x SATA Data Cables
1 x HDD Saver Cable
1 x Screw for Ultra M.2 Socket
1 x Screw for mini-PCIe Slot
More details
ESATA1 x eSATA

Questions about this item

Does this board support quad-channel DDR4 memory?

Yes, it has eight DDR4 slots wired for quad-channel operation and supports up to 128 GB total capacity.

Can I run a three-way SLI setup with any LGA 2011-v3 CPU?

Three-way SLI requires a CPU with 40 PCIe lanes; a 28-lane CPU limits the third slot to x4 and disables 3-Way SLI.

What M.2 speeds are possible on the Ultra M.2 socket?

The socket accepts M.2 SATA 6 Gb/s modules and PCIe Gen3 x4 drives up to 32 Gb/s bandwidth.

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