ASUS ROG Strix Helios II Mid-Tower Case - EATX, 450mm GPU
ASUS ROG
ASUS ROG Strix Helios II Mid-Tower Case - EATX, 450mm GPU
The ASUS ROG Strix Helios II Mid-Tower Case is a showcase gaming case designed for builders working with high-end graphics cards and custom water-cooling loops. It combines a premium aluminum and tempered glass design with practical features like tool-free assembly and efficient thermal management through pre-installed fans.
Why this product
Supports cards up to 450mm long
Accommodates flagship GPUs like the GeForce RTX 5090 in both horizontal and vertical mounting orientations.
Four 140mm fans pre-installed
Delivers optimized airflow while keeping noise at 29 dB(A), balancing performance and acoustics without compromise.
Dual tempered glass panels
Full visibility of your build through hinged side panels that swing away for tool-free interior access.
Radiator support up to 420mm front
Handles large water-cooling setups including dual radiators or the ROG Ryuo IV SLC 360 and RTX 5090 AIO simultaneously.
EATX motherboard support
Fits full-size EATX boards down to Mini-ITX, plus 8 expansion slots for maximum connectivity and upgrades.
Carrying straps rated for 50kg
X-shaped woven fabric handles transport of your complete system to LAN events with ergonomic comfort.
- Case TypeMid Tower
- Maximum GPU Length450mm
- Front Radiator SupportUp to 420mm
- Motherboard Sizes SupportedEATX, ATX, Micro-ATX, Mini-ITX
- Pre-installed Fans4 x 140 x 28mm
- Noise Level29 dB(A)
- Warranty2 Years
- SKUASU-3306
- EAN4711636061193
- Motherboards from EATX (12" × 10.9") down to Mini-ITX in a single case.
- Graphics cards up to 450mm long in both horizontal and vertical mounting.
- Radiators up to 420mm in the front and 360mm at the top, plus custom loop setups with pump and reservoir.
- Two USB 3.2 Gen 2×2 Type-C ports and four USB 3.2 Gen 1 Type-A ports on the front I/O panel.
- Maximum GPU width is 105mm; some cards wider than this specification may not fit despite meeting the length requirement.
Best for
- High-end gaming builds with flagship GPUs and custom water cooling
- Showcase and competition builds where aesthetics and visibility matter
- Builders wanting tool-free assembly and hinged glass panels for frequent upgrades
- LAN event attendees needing secure transport with tested 50kg carrying capacity
Trade-offs
- Compact builds. Mid-tower size and 450mm GPU support are designed for large systems, not space-constrained setups.
- Silent-first systems. At 29 dB(A) with four pre-installed fans, it prioritizes performance cooling over minimal noise.
- Budget builds. Premium aluminum construction, tempered glass panels, and precision CNC milling reflect a showcase-oriented price point.
- Workstations with GPUs wider than 105mm. Despite the 450mm length support, the internal width constraints may prevent installation of some professional accelerator cards.
ROG Strix Helios II is a premium mid-tower gaming case featuring dual tempered glass side panels, a refined aluminum frame, and a diamond grille front panel with a 3D-structured front filter.
It comes pre-installed with four 140 x 28 mm performance fans, delivering optimized airflow and enhanced thermal performance for demanding gaming setups. Engineered for expandability and performance, it's ready for motherboards ranging from ITX to EATX and serious water-cooling setups as well - making it the perfect choice for a classic ROG showcase build.
ROG Strix Helios II is made for showcase builds with dual 4mm-thick tempered glass side panels fitted in a refined brushed-aluminum frame. The aluminum front panel, featuring a diamond grille design, is manufactured using high-precision CNC milling technology and an anodizing process. The diagonal slashes on the front are inspired by race car elegance and individuality to make the Helios II unique.
The Helios II is designed to balance performance and acoustics: Four pre-installed 140mm fans with 28mm frames deliver strong airflow while maintaining a low 29 dB(A) noise level.
The ROG Strix Helios II is built to perform and primed for expansion, with ample space for GeForce RTX™ 5090 graphics cards or hardcore water-cooling setups. It can handle a ROG Ryuo IV SLC 360 ARGB AIO cooler and the 360mm radiator of the ROG Astral LC GeForce RTX 5090 at the same time. It features support for radiators up to 420mm in the front and 360mm at the top, with room reserved for installing the pump and reservoir of a custom loop.
ROG Strix Helios II is designed with multiple mechanisms to provide the smoothest building experience, even for DIY novices. Meanwhile, keeping your rig clean is made easy with built-in dust filters and easy access to all areas. Pushing a button at the rear of the case releases one of the side panels for tool-less access to the interior. Its tempered glass is hinged on the bottom to swing away and rest at an angle, or you can remove the panel completely and set it aside while you tinker. Two removable brackets let you easily mount fans and radiators before installing the whole assembly into the case, simplifying your building experience.
A tool-free graphics card slot clamp makes your PC building faster and hassle-free with a simple snap that secures your GPU firmly in place. For easier installation, a rear bracket detaches from the case so that a power supply can slide right in.
Easily carry your prized build to LAN parties with ergonomically X shape woven fabric straps that combine style and comfort, rigorously tested to support up to 50kg for reliable transport.
General
| Brand | ASUS ROG |
|---|---|
| Case Size | Mid Tower |
| Material | Aluminum frame with tempered glass panels |
| Warranty | 2 Years |
Motherboard & Expansion
| Motherboard Support | EATX (12" × 10.9"), ATX, Micro-ATX, Mini-ITX |
|---|---|
| Expansion Slots | 8 (plus 2 additional vertical) |
| Drive Bays | 4 x 2.5" Bay; 2 x 2.5"/3.5" Combo Bay |
GPU & Cooling
| Maximum GPU Length | 450mm (horizontal and vertical) |
|---|---|
| Maximum GPU Width | 105mm |
| Front Radiator Support | Up to 420mm |
| Top Radiator Support | Up to 360mm |
| Front Fan Support | 120mm / 140mm |
| Maximum Fan Capacity | Up to 7 x 120mm fans |
| Pre-installed Front Fans | 3 x 140 x 28mm performance fans |
| Pre-installed Rear Fan | 1 x 140 x 28mm performance fan |
| Noise Level | 29 dB(A) |
Connectivity & Features
| Front I/O Headphone/Microphone | 1 x 3.5mm |
|---|---|
| Front I/O USB Type-C | 2 x USB 3.2 Gen 2×2 |
| Front I/O USB Type-A | 4 x USB 3.2 Gen 1 |
| Tempered Glass Panels | Front, Left Side, Right Side |
| AURA Sync | Yes |
| Carrying Straps | X-shaped woven fabric, rated for up to 50kg |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.