Antec 900 Full Tower Case

The Antec 900 is a professional-grade full-tower chassis meticulously optimised for high-density Edge AI workloads and enterprise-level workstations. Engineered with a cavernous interior, this flagship frame provides native support for massive SSI-EEB, E-ATX, and AMD Threadripper motherboards, ensuring a robust foundation for multi-GPU and accelerator configurations like the Nvidia RTX 6000 Ada series. With a total of eight expansion slots and a spacious 495mm GPU clearance length, the 900 is purpose-built to stabilise the thermal and physical demands of high-bandwidth compute cards and professional-grade rendering hardware. To maintain peak efficiency during sustained simulations, the chassis features an advanced cooling ecosystem equipped with six pre-installed PWM fans (3x 140mm to the the front, 2x 120mm to the base and 1x 140mm to the rear) and dual radiator support of 420mm to the front and 360mm at the top. Its storage versatility is equally impressive, offering nine total drive bays, reimagined for massive AI datasets and RAID arrays, while the iShift 9 degree PSU mount and back-connect motherboard compatibility ensure a clean, high-bandwidth airflow path. Constructed from premium aluminium and steel with a tool-free 4mm tempered glass panel, the Antec 900 serves as a durable and sophisticated command centre for specialists who require uncompromised expansion potential and military-grade reliability in their workstation and 8K gaming set up.

Features

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Antec 900 Full Tower Case

Edge AI Workstation & 8K Gaming Full-Tower Chassis - Heritage - A Modern 900, Built on a Classic Name

The Antec Nine Hundred was one of the most recognisable high-airflow cases of its time-known for its open design, aggressive cooling, and expandability that let builders push hardware harder than ever before.

The new Antec 900 is a modern interpretation of that legacy.

Edge AI & Work Station Ready

Supports ATX, E-ATX, SSI-CEB, SSI-EEB, and AMD Threadripper.

AI-Optimised GPU Support

Built to house multi-GPU / accelerator configurations, including Al-optimised GPUs like NVIDIA RTX 6000 Ada, RTX A6000, and comparable compute cards.

GPU & Accelerator Support

Designed around professional accelerator cards and full-length, triple-slot GPUs used in AI, compute, and 8K-capable gaming.

Supports GPUs Up to 495 mm Long and Up to 160 mm Thick

Spacious interior accommodates multi-accelerator layouts, blower-style compute cards, or mixed GPU + add-in card setups.

Storage & Data Readiness

The "900" isn't just a name-it's built in. The 9 total drive bays nod directly to the original's storage flexibility, now reimagined for AI datasets, scratch discs, project libraries, and RAID.

Up to 9 Total Drive Bays

5 x 2.5" and 4 3.5" (or convertible for more 2.5" ).

Powerful Airflow Path Design

Features ultra case structure design for excellent airflow, delivering enhanced GPU cooling performance.

Included Fans for Enhanced Cooling Performance

Equipped with 6 high-performance pre-installed fans, the 900 further optimises its airflow design to deliver more stable and superior overall cooling efficiency.

• 1x Tranquil 140 - 140mm PWM fan
• 2x P12 Reverse - 120mm PWM fan
• 3x Tranquil 140 - 140mm PWM fans

Pre-Installed 6 x High-Performance PWM Fans

• 3 x TQ140 high-performance 140 mm front intake fans.
• 2 x PI2R reverse-flow 120 mm fans on the PSU shroud to stabilise chamber airflow.
• 1 x TQ140 140 mm rear exhaust fan.

2x P12R PWM Reverse

• Fan Speed | 1500 RPM (max.)
• Airflow | 61.46 CFM
• Noise | 27.6 dB(A)

4x Tranquil 140

• Fan Speed | 1500 RPM (max.)
• Airflow | 85.96 CFM
• Noise | 27.5 dB(A)

Adjustable Fan Bracket Supports Multiple Fan Sizes

Support for 2 x 200 mm front intake fans for high-volume, low-RPM airflow in noise-sensitive environments.

• Cooling Bracket: 200mm Fan Position
• Cooling Bracket: 140mm Fan Position
• Cooling Bracket: 120mm Fan Position

Multi-Directional Vent Design

• Front panel & Lower right side
• Left side panel & Top of PSU chamber
• Bottom
• Top Panel

Serious Cooling Headroom

Radiator Support: Front up to 420 mm (<52 mm thickness). Top up to 360 mm (<52 mm thickness).

Innovative iShift PSU 90° Mount

This installation requires the optional side-mount PSU bracket.

A Side Mount

The PSU connector is on the left side, facing downward, with the fan orientated downward.

B Side Mount

The PSU connector is on the left side, facing upward, with the fan orientated downward.

I/O Panel

Equipped with one high-speed USB Type-C 10Gbps port.

Support Back-Connect Motherboards

Plug in cables from behind to give front a cleaner look and a smoother airflow channel.

*Supported models: ASUS TUF B760M-BTF WIFI D4, ASUS TX GAMING B760-BTF WIFI, ASUS DIY-APE B760 REVOLUTION, MSI B760M PROJECT ZERO, MSI B650M PROJECT ZERO, Colourful CVN B760M FROZEN WIFI V20, and more to come.

Comes with 8 Reusable PCIe Slots

8 expansion slots provide room for accelerators, capture cards, high-speed networking, and storage controllers.

Tool-Free Panel Design

4 mm tempered-glass side panel, tool-free for quick access.

Removable Top Cooling Bracket

Mount the fans/radiators on the cooling bracket first and install the cooling bracket back to the case.

Full Dust Filtration on the Front, Top, and Bottom

• Top | Magnetic dust filter.
• Front | Magnetic dust filter.
• Bottom | Full-sized pull-out dust filter

Optimal Cable Routing Experience

Extensive Interior

• Motherboard support: ATX, E-ATX, SS-CEB, SSI-EEB, Threadripper, (Supports Back-Connect Motherboards)
• CPU cooler max height: ≤ 190 mm
• GPU max length: ≤ 495 mm (465mm with front fans installed)
• Total GPU Thickness + CPU Cooler Height: 190mm
• Max GPU Thickness: 160mm (cable excluded)
• Max PSU Size: ≤230mm (cable excluded) / ≤170mm (side mount)
• Expansion Slots: 8
• 3.5"/2.5": 4/4
• 2.5": 5