12x USB 2.0
2DVI-D Port
3D-Sub Port
4HDMI Port
52 x USB 3.1 Gen 1
6Realtek® LAN
72 x USB 3.1 Gen 1
88-ch Audio
9
PCI Express 3.0
- CrossFireX™ Support
- ASUS SafeSlot Core support
10
Audio Features
- Realtek® ALC887 Codec
- Audio Shielding
- Dedicated audio PCB layers
- Premium Japanese audio capacitors
11DIGI+ VRM & EPU
12DDR4 2666/2400/2133 Support
13Supports 9th / 8th GenIntel® Core™ ProcessorsIntel® LGA 1151 Socket
142 x front USB 3.1 Gen1
1516Gb/s M.2 SATA & PCIE x2mode support(2280)Intel® Optane™ Memory Ready
16Intel® B365 Chipset
176 x SATA 3.0 Ports
1832Gb/s M.2 PCIE x4mode support(22110)
Intel® Optane™ Memory Ready
192 x front USB 3.1 Gen1
4 x front USB 2.0
ASUS Prime 300 Series motherboards provide the solid foundation needed for your first build, plus flexibility to grow with your ambitions. We've melded all the good stuff that's packed into the latest processors with essential ASUS design and engineering, so you benefit from industry-leading technologies — including automated system tuning, comprehensive cooling controls, and immersive onboard audio. When you build with an ASUS Prime 300 Series motherboard, you build smart, easy and affordably.
Tune it your way
Improved DDR4 stability
ASUS OptiMem preserves memory signal integrity by routing traces and vias to the optimal PCB layer, and our T-Topology trace layout ensures time-aligned signaling by balancing trace lengths between memory slots. These enhancements allow the Prime 300 Series to support a wide range of dual and quad-DIMM memory kits, while providing your rig with the stability it needs to deal with any type of workload - whether you're gaming or running intensive applications
A larger signal eye results in improved stability, more overclocking headroom, and lower operating voltages
ASUS OptiMem advantage:
ASUS OptiMem
53.12 V*pS
Reference design
72.51 V*pS
26%
Reduction in crosstalk
ASUS OptiMem benefits:
- Improved memory stability and compatibility
- Allows lower memory latencies at equivalent voltages
- Improved memory frequency margin
Tested by using Synopsys HSPICE simulation software
EPU
Fan Xpert 2+
All-round energy efficiency
With the Energy Processing Unit (EPU) you'll enjoy system-wide power savings. The EPU automatically optimizes power consumption and maximizes savings with Away mode — a smart setting that creates an extreme energy-saving scenario by shutting down unused I/O controllers.
Flexible cooling controls
Prime 300 Series motherboards offer comprehensive control over system fans, via the included Fan Expert 2+ software. Auto-Tuning mode intelligently configures all parameters with a single click.
Cooler by design
Prime 300 Series features the most comprehensive cooling controls ever, configurable via ASUS Fan Xpert software or the UEFI BIOS.
Multiple temperature sources
4-pin PWM/DC fan
Each header can monitor and react to dedicated thermal sensors.
Each onboard CHA FAN header supports PWM and DC mode.
* Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.
Media-acclaimed UEFI BIOS
The UEFI BIOS is an early waypoint on any PC-building journey, and Prime 300 Series has one of the best in the business.
Q-Fan ControlCan configure the fan's operating speed manually, or use the easy pre-configured fan profiles to select Standard, Silent, Turbo or Full Speed modes, plus automatic switch to full speed if the temperature hits 75°C.
Learn more
EZ mode
Intuitive graphical fan controlFine-tune individual fans simply by dragging a curve with the mouse.
SATA Information: Display SATA port details that help you easily recognize drives.
Fast Clock Adjustment: Use mouse controls to change the time and date.
Advanced mode
My FavoritesQuickly find tuning options and add preferred tools to the list.
User ProfileSave BIOS settings for migration to new BIOS version or system.
SATA Port Renaming: Rename SATA ports for easy identification.
Ultrafast connectivity
USB 3.1 Gen 1 front-panel connector
Future-proof connectivity
USB 3.1 Gen 1 is right where you need it, with two super-speed headers for the front panel. Experience data-transfer speeds up to 10X faster than USB 2.0 with instant plug-and-play connectivity, and avoid back-breaking contortions in the hunt for hard-to-reach rear ports.
* Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.
M.2
Speed up with onboard M.2
With x4 PCI Express® 3.0/2.0 bandwidth, M.2 supports up to 32Gbps data-transfer speeds. It's the perfect choice for an operating system or application drive, providing fast access to data.
* Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.
Intel Optane memory
Intel Optane memory ready
Intel Optane™ is a revolutionary non-volatile memory technology supported by Prime 300 Series motherboards. Intel Optane memory modules accelerate attached storage to reduce boot and load times, so everything feels faster and more responsive.
Learn more >
Reliable stability and compatibility
Built to Last
ASUS is the world's leading motherboard brand. Our motherboards are extensively tested for compatibility with more than 1,000 components and devices, and each new model undergoes a minimum of 8,000 hours of strict validation — offering the peace of mind of knowing that your ASUS motherboard is fit for all environments and applications. Choosing ASUS is an assurance of trouble-free DIY experiences.
5X
Protection III
Hardware safeguards to ensure long-term durability.
520+
DDR4 compatibility
Industry-leading DDR4 memory compatibility for best flexibility and reassurance.
1000+
compatible devices
Compatibility with a range of CPUs, memory modules, graphics cards and more.
8000+
validation hours
Extensive testing with latest components for enhanced reliability, compatibility and safety.
Prime 300 Series motherboards are engineered with industry-leading 5X Protection III, employing the finest components, excellent circuit design and exacting standards to guarantee the quality and long-term durability of your investment. That means exceptional protection and stability for your build — thanks to decades of engineering experience from the world's leading motherboard brand.
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SafeSlot Core
Fortified PCIe slot prevents damage
SafeSlot Core is the ASUS-exclusive PCIe® slot. Featuring a fortified design that's anchored to the motherboard by a special hook, Safeslot Core provides 1.6X-stronger retention and 1.3X-greater shearing resistance than standard expansion slots.
Our Prime 300 Series motherboards also have strengthened solder points around both the PCIe and DIMM pins.
LANGuard
Pumped-up throughput, 2.5X-higher surge tolerance
ASUS LANGuard is hardware-level networking protection that employs signal-coupling technology and premium anti-EMI surface-mounted capacitors to ensure a more reliable connection and better throughput.
Overvoltage Protection
World-class circuit-protecting power design
An exclusive circuit design with built-in voltage regulators protects your motherboard from damage caused by unexpected high-level voltages from unstable or inferior power supplies.
DIGI+ VRM
Precision control for stable power
ASUS-exclusive DIGI+ VRM intelligently delivers power to the processor based on real-time demands, reducing energy waste and improving system stability.
DRAM Overcurrent Protection
Short-circuit damage prevention
Onboard resettable fuses prevent overcurrent and short-circuit damage. This extends beyond I/O ports to DRAM ― so it provides a safeguard to protect the lifespan of your system and connected devices.
Stainless-steel back I/O panel
3X corrosion-resistance for greater durability
Corrosion-resistant stainless-steel back I/O panels bonded with chromium oxide assure a lifespan that's 3X longer than ordinary panels.
ESD Guards
Electrostatic discharge protection
ASUS ESD Guards prolong the life of components while preventing damage from electrostatic discharge, providing protection for up to +/- 10kV of air discharge and +/- 6kV of contact discharge.
1000+
Compatible devices and components
The superior compatibility of Prime 300 Series is evidenced by our extensive list of supported devices — which includes thousands of compatible components — and our Qualified Vendor List (QVL) that identifies memory compatibility. It all adds up to more choices for worry-free PC-building experiences.
8000+
VALIDATION HOURS
ASUS motherboards offer superb endurance. We verify this by subjecting every board to more than 8,000 hours of stringent tests. A barrage of burn-in, environmental, compatibility, software and safety tests confirm that our motherboards are exceptionally robust. It also shows that ASUS reliability surpasses industry standards, ensuring that every component is designed to function flawlessly in any environment.
Learn more
Temperature and humidity tests
Ensures components withstand extreme conditions.
Thermal measurement tests
Ensures that the system remains cool and stable under the heaviest loads.
Insertion tests
Every port and connector is put through repeated installation cycles.
Aging tests
Up to 48-hour aging test ensures reliability.
Power-consumption tests
Delivers world-class energy efficiency.
Temperature and DC margin tests
Ensures that the motherboard is capable of coping with voltages fluctuations caused by varying temperatures.
Thermal-shock tests
Ensures ability to survive temperature changes during transportation.
Non-operation shock tests
Built to withstand jolts that may occur during shipping.
Burn-in tests
Every component is checked to ensure flawless operation.
Installation tests
Connector placement is double-checked to ensure hassle-free installation.
Drop tests
Drop tests from various heights ensure durability.
Salt and spray tests
Tested for I/O reliability, prolonged lifespan and rust-resistance.
Upgrade to unrivalled audio
Outstanding audio
Combined onboard features deliver elevated audio
Intelligent design and premium hardware create audio quality unlike anything you've ever experienced!
Audio shielding
Separates analog/digital signal domains, significantly reducing multi-lateral interference.
Separate layer for left and right tracks
Ensures minimal crosstalk between audio paths.
Premium Japanese audio capacitors
Premium parts provide an immersive sound signature, with exceptional fidelity.
* Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.
Visual beauty, virtual worlds
Aura Sync
Outshine the competition
A well-tuned enthusiast system deserves a matching aesthetic. ASUS Aura Sync offers full lighting connected via the motherboard's RGB header, with a variety of functional presets for external LED strips.* And it can all be synced with an ever-growing portfolio of Aura-capable ASUS hardware.
Learn more >
Static
Breathing
Strobing
Rainbow
Color cycle
Comet
Flash &
dash
Wave
Glowing
Yo Yo
Starry
night
Music
effect
CPU
temperature
* The Aura RGB-strip header supports 5050 RGB LED strips with a max power rating of 3A (12V). For maximum brightness, strip length should not exceed 3m.
LED strips and Aura Sync-compatible devices are sold separately.
* Specifications and features vary by model, and all images are illustrative. Please refer specification pages for full details.
Beyond VR ready
Complete your immersion
Prime 300 series isn't just VR ready — it goes way beyond. The ASUS Beyond VR Ready marque means that Prime 300 series has been tested with loads of class-leading components to ensure that your productivity, gaming and entertainment needs are tuned for maximum performance. ASUS Beyond VR Ready opens up a new way to configure and build your dream system with total confidence.
Intel B365 chipsetThe Intel® B365 is a single-chipset design that supports Socket 1151 for 9th Gen and 8th Gen Intel® Core™, Pentium® Gold and Celeron® processors. It provides improved performance by utilizing serial point-to-point links, allowing increased bandwidth and stability. Additionally, the B365 chipset provides a maximum of eight USB 3.1 Gen 1 ports, six SATA 6Gbps ports, and 32Gbps M.2 and PCIe 3.0 lane-speed support, for faster data retrieval. Intel B365 also supports integrated-graphics, so you'll enjoy the very latest in graphics performance.
Ready for Socket 1151 for 9th / 8th Gen Intel® Core™, Pentium® Gold and Celeron® processorsThis motherboard supports Socket 1151 for 9th Gen and 8th Gen Intel® Core™, Pentium® Gold and Celeron® processors, with integrated graphics, memory and PCI Express controllers to support onboard graphics output with dedicated chipsets, dual-channel (4-DIMM) DDR4 memory and 16 PCI Express 3.0/2.0 lanes for great performance.
