For sale is my ASUS PRIME X299-A motherboard. It is in good working condition. BIOS has been updated to the latest available as of January 2026. Comes with pre-installed M.2 screws, and an aftermarket I/O shield. Some bent pins in the CPU socket have been bent back into correct position. Does not come with retail box or any other accessories not pictured.

I may have several of these for sale, so the item you receive may have a slightly different physical condition or different serial numbers or different stickers from the pictured item, and packaging for any pictured accessories may vary. This is a used item, so some scratches or dust are to be expected.

Your purchase comes with everything pictured. You are only buying what is pictured, and nothing else. If a cable or something else is not pictured, it is not included!

SHIPPING AND PURCHASE TERMS

I do combined shipping discounts! Multiple quantity listings already have automatic shipping discounts included, but multiple items from different listings do not. If you want to purchase from multiple listings from me and you need a shipping adjustment, please contact me and an adjustment will be made after purchase. Shipping discounts on additional items beyond the first item vary, but expect modest to significant savings depending on factors like size, weight, and distance for the package(s). Multiple listing combined shipping discounts are not automatic and must be requested.

Due to increasing amounts of fraudulent buyers using freight forwarders, buyers suspected to be using a freight forwarder will be scrutinized for fraudulent activity, and will require an admission in eBay messages that a freight forwarder is being used for that order. I reserve the right to cancel and refund orders using freight forwarders in order to protect myself from potential fraud.

Item serial number will be recorded if present.

Signature confirmation will be required on all sales of $750 or more.

International buyers READ THIS: International shipping for most countries will be handled by eBay international shipping services. Otherwise it will be shipped with an appropriate USPS, UPS, or FedEx service. Keep in mind, I cannot change customs value of the item and I cannot mark it as gift. Import duties, taxes, and charges aren't included in the item price or postage cost for items not shipped with eBay international shipping. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.

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Learn more about the ASUS Prime X299-A

Model
BrandASUS
ModelPrime X299-A
Supported CPU
CPU Socket TypeLGA 2066
CPU TypeCore X series (LGA2066)
Supported CPU TechnologiesThe Intel Turbo Boost Max Technology 3.0 support depends on the CPU types
* Refer to ASUS website for CPU support list
Chipsets
ChipsetIntel X299
Onboard Video
Onboard Video ChipsetNone
Memory
Number of Memory SlotsCore X-series Processors (6-core above): 8 x 288pin
Core X-series Processors (4-core): 4 x 288pin
Memory StandardDDR4 4000(O.C.)/ 3600(O.C.)/ 2666/ 2400/ 2133
* Hyper DIMM support is subject to the physical characteristics of individual CPUs.
** Refer to ASUS website for the Memory QVL (Qualified Vendors Lists).
Maximum Memory SupportedCore X-series Processors (6-core above): 128GB
Core X-series Processors (4-core): 64GB
Expansion Slots
PCI Express 3.0 x1644-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
28-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x16/x8, x16/x8/x1)*
16-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x8/x8, x8/x8/x1)*

* PCIEX16_3 share bandwidth with PCIEX4_1 when using x28 or x16 lane CPU
PCI Express x42 x PCIe 3.0 x4 (max at x4 mode) *
* PCIEX4_1 max. at x1 mode, PCIEX4_2 max. at x4 mode
PCI Express x11 x PCIe 3.0/2.0 x1
PCIEX1_1 shares bandwidth with Front USB 3.1 GEN 2
Storage Devices
Serial ATA (SATA)8 x SATA 6Gb/s
M.21 x M.2 x4 Socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x4 mode)
1 x M.2 x4 Socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x4 mode)
Intel Optane ReadyYes
SATA RAID0/1/5/10
Onboard Audio
Audio ChipsetRealtek ALC S1220A
Audio Channels8 Channels
Onboard LAN
LAN ChipsetIntel I219-V
Max LAN Speed1Gbps
Rear Panel Ports
RJ451 x RJ45
USB 3.11 x USB 3.1 Gen 2

4 x USB 3.1 Gen 1
USB 1.1/2.02 x USB 2.0 (one port can be switched to USB BIOS Flashback)
USB Type-C1 x USB 3.1 Gen 2
S/PDIF Out1 x Optical
Audio Ports5 Ports
Internal I/O Connectors
Onboard USB1 x USB 3.1 Gen 2 front panel connector
2 x USB 3.1 Gen 1 connector(s) support(s) additional 4 USB 3.1 Gen 1 port(s)
1 x USB 2.0 connector(s) support(s) additional 2 USB 2.0 port(s)
Other Connectors1 x AAFP connector
2 x Aura RGB Strip Header
1 x M.2_FAN connector
1 x VROC_HW_Key
1 x CPU Fan connector(s)
1 x CPU OPT Fan connector(s)
2 x Chassis Fan connector(s)
1 x AIO_PUMP connector
1 x W_PUMP+ connector
1 x Thunderbolt header(s)
1 x System panel(s) (Q-Connector)
1 x 5-pin EXT_FAN (Extension Fan) connector
1 x MemOK! button(s)
1 x Thermal sensor connector(s)
1 x Power-on button(s)
1 x Clear CMOS jumper(s)
1 x CPU_OV jumper
Physical Spec
Form FactorATX
LED LightingRGB
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin EATX Power connector(s)
1 x 8-pin ATX 12V Power connector(s)
1 x 4-pin ATX 12V Power connector(s)
Features
FeaturesMulti-GPU Support:
Supports NVIDIA Quad-GPU SLI Technology
Supports NVIDIA 3-Way SLI Technology
Supports NVIDIA 2-Way SLI Technology
Supports AMD Quad-GPU CrossFireX Technology
Supports AMD 3-Way CrossFireX Technology

Special Features:
OC Design - ASUS PRO Clock II Technology
ASUS Dual Intelligent Processors 5-Way Optimization by Dual Intelligent Processors 5:
- 5-Way Optimization tuning key perfectly consolidates TPU, EPU, DIGI+ VRM, Fan Xpert 4, and Turbo Core App
AURA:
- Aura RGB Strip Headers
- Aura Lighting Effects Synchronization with compatible ASUS ROG devices
ASUS Exclusive Features:
- USB BIOS Flashback
- MemOK!
- AI Suite 3
- Ai Charger
- Onboard Button: Power
- ASUS UEFI BIOS EZ Mode featuring friendly graphics user interface
- Turbo LAN
- Crystal Sound 3
File Transfer
- Cloud GO!
- File Transfer
ASUS EZ DIY:
- ASUS EZ Flash 3
- ASUS USB BIOS Flashback
- ASUS UEFI BIOS EZ Mode
- Multi-language BIOS
ASUS Q-Design:
- ASUS Q-Shield
- ASUS Q-Code
- ASUS Q-LED (CPU, DRAM, VGA, Boot Device LED, HDD LED)
- ASUS Q-Slot
- ASUS Q-DIMM
- ASUS Q-Connector
Gaming Aesthetics:
- 3D printing friendly
- AURA-RGB Lighting
M.2 Onboard (The latest transfer technologies with up to 32Gb/s data transfer speeds)

BIOS:
128MB Flash ROM, UEFI AMI BIOS, PnP, DMI3.0, WfM2.0, SM BIOS 3.0, ACPI 6.0, Multi-language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F11 EZ Tuning Wizard, F6 Qfan Control, F3 My Favorites, Last Modified log, F12 PrintScreen and ASUS DRAM SPD (Serial Presence Detect) memory information

Manageability:
WfM 2.0, DMI 3.0, WOL by PME, PXE

Operating System:
Windows 10 64-bit
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