Asus PRIME J3355I-C, mini-ITX motherboard

ASUS Prime is the next evolution of the ASUS motherboard, born of a pedigree that stretches back to 1989. Our team of world-class engineers are passionate about empowering everyone to enjoy the benefits of customization and tuning, and the driving force behind the development of Prime is to make advanced enthusiast controls easily accessible — maximizing performance, stability and compatibility for the very best DIY PC experiences. Simply stated: it's time for Prime.

Reliable Stability and Compatibility

Built to Last
ASUS is the world's foremost motherboard manufacturer, renowned for our unique Design Thinking approach. Our exhaustive testing exceeds industry standards, supported by high-quality components for exceptional real-world protection. Our motherboards are proven to be compatible with more than 1,000 components and devices, and each new model undergoes a minimum of 8,000 hours of strict validation. ASUS gives you the peace of mind of knowing that your motherboard is fit for all environments and applications. By choosing ASUS, you also gain the freedom to select outstanding component options, for trouble-free DIY experiences.

5X
Protection II
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.

Advanced Hardware Safeguards
Industry-leading 5X Protection II employs the finest components, excellent circuit design, and exacting standards to guarantee quality and long-term durability of your motherboard with all-round protection. For you, that means exceptional protection and stability for your build — the result of decades of engineering experience from the world's leading motherboard brand.

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, plus electrostatically guarded and surge-protected components for greater tolerance to static electricity and improved protection against surges.

Overvoltage Protection
World-class circuit-protecting power design
An exclusive circuit design with built-in voltage regulators to protect your chipset, connectivity ports, and audio codecs from damage caused by unexpected high-level voltages from unstable or inferior power supplies.

DRAM Overcurrent Protection
Short-circuit damage prevention
Onboard resettable fuses prevent overcurrent and short-circuit damage. This extends beyond I/O ports to DRAM to safeguard the lifespan of your system and connected devices.

Stainless-Steel Back I/O
3x corrosion-resistance for greater durability
Corrosion-resistant stainless-steel back I/O panels bonded with chromium oxide have a lifespan that's three times longer than ordinary panels.

ESD Guards
Electrostatic discharge protection
ASUS ESD Guards prevent damage from electrostatic discharge, up to +/- 10kV for air discharge and +/- 6kV for contact discharge, arranged in an active-protective-circuit design that prolongs the life of components.

Proven Compatibility
Tested to be compatible with 1,000+ CPUs, DDR4 memory modules, graphics cards and more
Having the freedom to pick and choose the parts that go into your machine is at the heart of PC DIY. Our extensive certification program focuses on providing the very best compatibility with the widest range of components and devices, giving you the freedom to build and upgrade without frustration. Compatible today and compatible far into the future – that's the ASUS way.

Extensive List of Supported Devices
View supported devices and Qualified Vendor List for compatible memory
The superior compatibility of Prime series is evidenced by our extensive list of supported devices — which includes thousands of compatible components — and our Qualified Vendor List that identifies memory compatibility. That means more choices for worry-free PC-building experiences.

Great Compatibility
with ASUS Products
ASUS offers a suite of proprietary components — graphics cards, sound cards, optical drives — that perfectly complement the Prime series, so you can complete your custom motherboard build with confidence!

Top-to-bottom Reliability
ASUS motherboards have 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.

8000+ VALIDATION HOURS

Temperature and Humidity Test
Ensures components withstand extreme conditions.

Thermal Measurement Test
Ensures that the system remains cool and stable under the heaviest loads.

Insertion Test
Every port and connector is put through repeated installation cycles.

Aging Test
Up to 48-hour aging test ensures reliability.

Power Consumption Test
Checked for world-class energy efficiency.

Temperature and DC Margin Test
Ensures that the motherboard is capable of coping with Voltage fluctuations caused by varying temperatures.

Thermal Shock Test
Ensures ability to survive temperature changes during transportation.

Non-Operation Shock Test
Built to withstand jolts that may occur during shipping.

Burn-In Test
Every component is checked to ensure flawless operation in any environment.

Installation Test
Connector placement is double-checked to ensure hassle-free installation.

Drop Test
Drop tests from various heights ensure durability.

Salt and Spray Test
Tested for I/O reliability, prolonged lifespan and rust-resistance.

Optimized Cooling

Fan Xpert
Dedicated CPU and case fan controls
Exclusive Fan Xpert ensures every fan achieves the best balance of cooling performance and low noise - and with Prime 200 series boards and their hardware-level 4-pin/3-pin PWM/DC mode for case fans, a simple BIOS adjustment lets you run your case fan in PWM/DC. Fan Xpert even includes Auto-Tuning mode to scan and detect all fan characteristics for single-click customization!

Ultrafast Transfer Speeds

Instant front-panel USB 3.0 Experience
We've put USB 3.0 right where you need it - two super-speed ports on the front panel. Experience data-transfer speeds up to 10X faster than USB 2.0 with instant plug-and-play connectivity, so no more back-breaking contortions in the hunt for hard-to-reach rear ports!

Easy PC DIY

Safe Motherboard Mounting
Component-free areas to minimize damage risk
Fitting your ASUS motherboard is now safer than ever. The comprehensive component-free ‘safe zones' around every case-mounting hole minimizes the risk of damage and short circuits caused by contact — so you'll assemble your PC with total confidence!

Q-DIMM
Easy memory removal
Even if you work with a smaller case, just push down on the one-sided clip and push or pull RAM modules in or out — removing memory is that simple!

One-Stop Controls

Media-acclaimed UEFI BIOS
The smoothest, slickest mouse-controlled graphical BIOS has been improved to make it even more appealing. Whether you're a PC novice or a seasoned overclocker, EZ and Advanced modes help you find your way, quickly and easily.

AI Suite 3
One-stop access to innovative ASUS features
ASUS AI Suite 3 offers a brand-new user experience through a clearer and more attractive interface with support for larger monitors. It consolidates all exclusive ASUS features into one simple-to-use package, allowing you to supervise overclocking, energy consumption, fan speeds, voltages and more. This all-in-one app offers diverse and easy-to-use functionality, with no need to switch back and forth between different utilities.

Intel CPU features

Power efficiency plus high-resolution graphics, thanks to the integrated Intel Celeron® Dual-Core SoC Processor J3355 with HD Graphics support.
This motherboard features an integrated Intel Celeron Dual-Core Processor J3355 and Intel HD Graphics. This revolutionary 14nm ultra low voltage SoC (System On a Chip) combines superb processing power and advanced HD graphics support in one small, energy efficient design. Despite minimal power requirements, it still has the processing power to display the latest DirectX 11.1 HD graphics. It features support for 4K/UHD (ultra-high-definition) resolutions of up to 3840 x 2160, and also has integrated USB 3.0 support.