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Rectangular ATX motherboard with black PCB and silver heatsinks, LGA 2066 socket, eight DDR4 slots, multiple PCIe x16 slots

ASRock

ASRock X299 EXTREME4 LGA 2066 Intel motherboard

SKU CH-BBGF-HRKBW

ATX board for Core X series CPUs with quad-channel DDR4 up to 128 GB, three PCIe 3.0 x16 slots, dual Ultra M.2 sockets, eight SATA3 ports and Intel I219-V LAN

  • CPU Socket TypeLGA 2066
  • CPU TypeCore X series (LGA2066)
  • Supported CPU TechnologiesSupports Intel Turbo Boost Max Technology 3.0 * Please note
  • ChipsetIntel X299
  • Onboard Video ChipsetNone
  • Number of Memory Slots8x288pin (DDR4)
  • Supports Core X series CPUs via LGA 2066 socket
  • Quad-channel DDR4 memory up to 128 GB capacity
  • Three PCI Express 3.0 x16 slots for multi-GPU configurations
  • Two Ultra M.2 sockets with PCI Express 3.0 x4 bandwidth
  • Intel I219-V LAN plus Realtek ALC1220 7.1-channel audio

LGA 2066 workstation motherboard

The ASRock X299 EXTREME4 accepts Intel Core X series processors in an LGA 2066 socket and provides eight DDR4 slots for quad channel memory up to 128 GB. It targets content creators and engineers who need many cores and large memory capacity on an ATX form factor.

Memory and storage configuration

Four Ultra M.2 sockets support modules from 2230 to 2280 length, with the top two slots wired for PCI Express 3.0 x4 speeds up to 32 Gb/s. Eight SATA3 ports add RAID 0, 1, 5 and 10 options, though populating M.2 slots can disable adjacent SATA connectors.

PCI Express lane allocation

The CPU lane count determines how the three PCI Express 3.0 x16 slots divide bandwidth: 44 lane processors run x16/x16/x4, 28 lane processors run x16/x8/x4, and 16 lane processors reduce the arrangement further. Using the PCI Express x1 slot disables the M.2 Key E socket for Wi-Fi modules.

Highlights

  • Supports Core X series CPUs via LGA 2066 socket
  • Quad-channel DDR4 memory up to 128 GB capacity
  • Three PCI Express 3.0 x16 slots for multi-GPU configurations
  • Two Ultra M.2 sockets with PCI Express 3.0 x4 bandwidth
  • Intel I219-V LAN plus Realtek ALC1220 7.1-channel audio

Specifications

BrandASRock
ModelX299 EXTREME4
CPU Socket TypeLGA 2066
CPU TypeCore X series (LGA2066)
Supported CPU TechnologiesSupports Intel Turbo Boost Max Technology 3.0
* Please note that the 4-Core processors only support Intel Turbo Boost Technology 2.0.
ChipsetIntel X299
Onboard Video ChipsetNone
Number of Memory Slots8x288pin (DDR4)
Memory StandardDDR4 4200+(OC)*/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3800(OC)/ 3733(OC)/ 3600(OC)/ 3200(OC)/ 2933(OC)/ 2800(OC)/ 2666/ 2400/ 2133
* The maximum memory frequency supported may vary by processor type.
* Please refer to Memory Support List on ASRock's website for more information.
Maximum Memory Supported128GB
Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows 32-bit OS. For Windows 64-bit OS with 64-bit CPU, there is no such limitation.
Channel SupportedQuad Channel
PCI Express 3.0 x163 x PCI Express 3.0 x16 Slots*
* If you install CPU with 44 lanes, PCIE2/PCIE3/PCIE4 will run at x16/x16/x4.
* If you install CPU with 28 lanes, PCIE2/PCIE3/PCIE4 will run at x16/x8/x4.
* If you install CPU with 16 lanes, PCIE2/PCIE3/PCIE4 will run at x16/x0/x4 or x8/x8/x4.
* Supports NVMe SSD as boot disks
PCI Express x11 x PCI Express 3.0 x1 Slot**
** If PCIE1 slot is occupied, M2_3 slot will be disabled.
Other Slots1 x M.2 Socket (Key E), supports type 2230 Wi-Fi/BT module
15µ Gold Contact in VGA PCIe Slot (PCIE2 and PCIE3)
Serial ATA (SATA)8 x SATA3 6.0Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug*
* If M2_1 is occupied by a SATA-type M.2 device, SATA3_0 will be disabled.
* If M2_2 is occupied by a SATA-type M.2 device, SATA3_1 will be disabled.
M.21 x Ultra M.2 Socket (M2_1), supports M Key type 2230/2242/2260/2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s)**
1 x Ultra M.2 Socket (M2_2), supports M Key type 2230/2242/2260/2280/22110 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen3 x4 (32Gb/s)**
** Supports Intel Optane Technology
** Supports NVMe SSD as boot disks
** Supports ASRock U.2 Kit
SATA RAID0/1/5/10
Audio ChipsetRealtek ALC1220
Audio Channels7.1 Channels
LAN ChipsetIntel I219-V
Max LAN Speed1Gbps
PS/21 x PS/2 Mouse Port
1 x PS/2 Keyboard Port
RJ451 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
USB 3.11 x USB 3.1 Gen2 Type-A Port (10Gb/s) (ASMedia ASM3142) (Supports ESD Protection)
4 x USB 3.1 Gen1 Ports (Supports ESD Protection)
USB 1.1/2.02 x USB 2.0 Ports (Supports ESD Protection)
USB Type-C1 x USB 3.1 Gen2 Type-C Port (10Gb/s) (ASMedia ASM3142) (Supports ESD Protection)
S/PDIF Out1 x Optical
Audio PortsHD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone
Onboard USB2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection)
1 x USB 3.1 Gen1 Header (Supports 2 USB 3.1 Gen1 ports) (Supports ESD Protection)
Other Connectors1 x Virtual RAID On CPU Header
1 x TPM Header
1 x Power LED and Speaker Header
2 x RGB LED Headers*
1 x CPU Fan Connector (4-pin)**
1 x CPU Optional/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)***
2 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control)
1 x Chassis Optional/Water Pump Fan Connector (4-pin) (Smart Fan Speed Control)****
1 x Front Panel Audio Connector (15µ Gold Audio Connector)
1 x Thunderbolt AIC Connector (5-pin)*****
1 x Performance Mode / Easy OC Header
*Supports in total up to 12V/3A, 36W LED Strip.
**The CPU Fan Connector supports the CPU fan o
Form FactorATX
LED LightingRGB
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin ATX Power Connector (Hi-Density Power Connector)
2 x 8-pin 12V Power Connectors (Hi-Density Power Connector)
FeaturesUnique Feature:
ASRock USB 3.1 Gen2
- ASRock USB 3.1 Gen2 Type-A Port (10Gb/s)
- ASRock USB 3.1 Gen2 Type-C Port (10Gb/s)
ASRock Super Alloy
- XXL Aluminum Alloy Heatsink
- Premium 60A Power Choke
- Premium Memory Alloy Choke (Reduces 70% core loss compared to iron powder choke)
- Dual-Stack MOSFET (DSM)
- Nichicon 12K Black Caps (100% Japan made high quality conductive polymer capacitors)
- Matte Black PCB
- High Density Glass Fabric PCB
ASRock Steel Slots
ASRock Ultra M.2 (PCIe Gen3 x4 & SATA3)
ASRock Full Spike Protection (for all USB, Audio, LAN Ports)
ASRock Live Update & APP Sh

Questions about this item

Will the 15µ gold contacts in the PCIe x16 slots need periodic cleaning or replacement?

The 15µ gold contacts are a durable surface finish on the PCIe slots; they do not wear out in normal use and require no scheduled cleaning or replacement.

Which component limits sustained performance first — the 44-lane CPU PCIe topology or the quad-channel DDR4 memory bandwidth?

With a 44-lane Core X processor the three PCIe 3.0 x16 slots run at x16/x16/x4, so multi-GPU or high-speed add-in cards hit the lane budget before the quad-channel DDR4 interface saturates.

How much heat and fan noise should I expect from the X299 chipset and VRM area when the board runs all day with a 128GB DDR4 kit?

The Intel X299 PCH and the board's voltage regulators are passively cooled; with a 128GB quad-channel DDR4 load they run warm but silent, relying on case airflow rather than active fans.

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