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.
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
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 software. Auto-tuning mode intelligently configures all parameters witha 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.
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.
Can 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.
USB 3.1 Gen 1 front-panel connector
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.
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.
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.
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.
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.
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.
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.
Combined onboard features deliver elevated audio
Intelligent design and premium hardware create audio quality unlike anything you've ever experienced!
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.
Brighten Up Your Build
LED-illuminated control for trace paths
Built-in LED lighting options illuminate your build in a variety of eye-catching styles.
Intel® Socket 1151 9th / 8th Gen Intel® Core™, Pentium® Gold and Celeron® Processors
Supports Intel® 14 nm CPU
Supports Intel® Turbo Boost Technology 2.0
The Intel® Turbo Boost Technology 2.0 support depends on the CPU types.
Refer to www. asus.com for CPU support list
Intel® B365 Chipset
2 x DIMM, Max. 32GB, DDR4 2666/2400/2133 MHz Non-ECC, Un-buffered Memory
Dual Channel Memory Architecture
Supports Intel® Extreme Memory Profile (XMP)
Refer to www. asus.com for the Memory QVL (Qualified Vendors Lists).
The maximum memory frequency supported varies by processor
DDR4 2666MHz and higher memory modules will run at max. 2666MHz on Intel® 8th Gen. 6-core or higher processors.
Integrated Graphics Processor- Intel® HD Graphics support
Multi-VGA output support : DVI-D/D-Sub ports
- Supports DVI-D with max. resolution 1920 x 1200 @ 60 Hz
- Supports D-sub with max. resolution 1920 x 1200 @ 60 Hz
Maximum shared memory of 1024 MB (for iGPU exclusively)
Supports Intel® InTru™ 3D, Quick Sync Video, Clear Video HD Technology, Insider™
1 x PCIe 3.0/2.0 x16 (x16 mode, gray)
2 x PCIe 3.0/2.0 x1
Intel® B365 Chipset :
1 x M.2 Socket 3, , with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode)*1
6 x SATA 6Gb/s port(s), gray,
Support Raid 0, 1, 5, 10
Intel® Optane™ Memory Ready
Realtek® RTL8111H, 1 x Gigabit LAN
ASUS LAN Guard
Realtek® ALC887 8-Channel High Definition Audio CODEC
- Supports : Jack-detection, Front Panel Jack-retasking Audio Feature :
- LED-illuminated design - Brighten up your build with the gorgeous illuminated audio trace path.
- Audio Shielding: Ensures precision analog/digital separation and greatly reduced multi-lateral interference
- Dedicated audio PCB layers: Separate layers for left and right channels to guard the quality of the sensitive audio signals
- Premium Japanese audio capacitors: Provide warm, natural and immersive sound with exceptional clarity and fidelity
Choose the chassis with HD audio module in front panel to support 8-channel audio output.
Intel® B365 Chipset :
6 x USB 3.1 Gen 1 up to 5Gbps port(s) (4 at back panel, blue, Type-A, 2 at mid-board) Intel® B365 Chipset :
6 x USB 2.0/1.1 port(s) (2 at back panel, black, 4 at mid-board)
ASUS 5X Protection III :
- ASUS SafeSlot Core: Fortified PCIe Slot prevents damage
- ASUS LANGuard: Protects against LAN surges, lightning strikes and static-electricity discharges!
- ASUS Overvoltage Protection: World-class circuit-protecting power design
- ASUS Stainless-Steel Back I/O: 3X corrosion-resistance for greater durability!
- ASUS DIGI+ VRM: Premium components provide better power efficiency ASUS OptiMem:
- Optimem (Improved DDR4 stability) ASUS EPU :
- EPU ASUS Exclusive Features :
- AI Suite 3
- Ai Charger
- PC Cleaner ASUS Quiet Thermal Solution :
- Stylish Fanless Design Heat-sink solution
- ASUS Fan Xpert ASUS EZ DIY :
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode ASUS Q-Design :
- ASUS Q-DIMM M.2 Onboard(The latest transfer technologies with up to 32Gb/s data transfer speeds)
- Auto download driver and software. Friendly for first PC builder.
Back I/O Ports
1 x PS/2 keyboard (purple)
1 x PS/2 mouse (green)
1 x DVI-D
1 x D-Sub
1 x LAN (RJ45) port(s)
4 x USB 3.1 Gen 1 (blue) Type-A up to 5Gbps
2 x USB 2.0
1 x 8-channel Audio I/O
Internal I/O Ports
1 x USB 3.1 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.1 Gen 1 port(s) (19-pin)
2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s)
1 x M.2 Socket 3 with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode)
1 x COM port(s) connector(s)
6 x SATA 6Gb/s connector(s)
1 x CPU Fan connector(s) (1 x 4 -pin)
1 x Chassis Fan connector(s) (1 x 4 -pin)
1 x S/PDIF out header(s)
1 x 24-pin EATX Power connector(s)
1 x 8-pin EATX 12V Power connectors
1 x Front panel audio connector(s) (AAFP)
1 x Clear CMOS jumper(s)
1 x System panel connector
1 x Speaker connector
2 x SATA 6Gb/s cable(s)
1 x M.2 Anchor
1 x SCD
128 Mb Flash ROM, UEFI AMI BIOS, PnP,SM BIOS 3.1, ACPI 6.1, Multi-language BIOS, ASUS EZ Flash 3, CrashFree BIOS 3, F6 Qfan Control, F3 My Favorites, Last Modified log, F12 PrintScreen, and ASUS DRAM SPD (Serial Presence Detect) memory information
WOL by PME, PXE
Windows® 10 64-bit
mATX Form Factor
8.9 inch x 7.3 inch ( 22.6 cm x 18.5 cm )
1 When a device in SATA mode is installed on the M.2 socket, SATA6G_1 port cannot be used.