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Antec 900 full tower chassis with four tempered glass panels and front I/O cluster

Antec

Antec 900 Full Tower PC Case

SKU CH-H9Q3-XWVNQ MPN Antec 900

Full-tower ATX chassis supporting E-ATX and Threadripper boards with six PWM fans pre-installed and 420 mm front radiator clearance

  • TypeATX Full Tower
  • Case MaterialAluminum / Steel / Plastic / Tempered Glass
  • Motherboard CompatibilityATX, E-ATX, SS-CEB,SSI-EEB , Threadripper, (Supports Back-Co
  • Side Panel4 x Sides Tempered Glass Panel
  • Dust FiltersBottom / Front / Top
  • Internal 3.5" Drive Bays4
  • Full-tower space for E-ATX and Threadripper boards with back-connect support
  • Six pre-installed PWM fans create a high-volume airflow path for GPU stability
  • Front radiator support up to 420 mm with 52 mm thickness allowance
  • Nine drive bays for large datasets plus USB Type-C 10 Gbps front port
  • Tool-free 4 mm tempered glass panels and dust filters on front, top and bottom

AI Workstation Chassis

The Antec 900 is a full tower case built for AI workstations and high-end gaming systems. It supports E-ATX, SSI-EEB, SS-CEB and Threadripper motherboards, including back-connect designs. The interior fits dual graphics cards up to 495 mm long and 160 mm thick. Four tempered glass panels give full view of the build.

Upgrade From Mid Tower

Builders moving from a standard mid tower gain the 420 mm front radiator clearance and the 9 drive bays needed for large datasets. The jump is worth it when a 360 mm radiator no longer fits or when a second GPU is required for compute workloads. Six pre-installed PWM fans — three 140 mm front, two 120 mm reverse on the PSU shroud and one 140 mm rear — establish a high-volume airflow path from day one.

Front Panel And Radiator Limits

The front I/O provides two USB 3.0 ports, one Type-C 10 Gbps port and a headset jack. Radiator support tops out at 420 mm in the front with 52 mm thickness and 360 mm at the top with the same thickness. CPU cooler height is limited to 190 mm and power supply length to 230 mm.

Highlights

  • Full-tower space for E-ATX and Threadripper boards with back-connect support
  • Six pre-installed PWM fans create a high-volume airflow path for GPU stability
  • Front radiator support up to 420 mm with 52 mm thickness allowance
  • Nine drive bays for large datasets plus USB Type-C 10 Gbps front port
  • Tool-free 4 mm tempered glass panels and dust filters on front, top and bottom

Specifications

BrandAntec
ModelAntec 900
TypeATX Full Tower
Case MaterialAluminum / Steel / Plastic / Tempered Glass
Motherboard CompatibilityATX, E-ATX, SS-CEB,SSI-EEB , Threadripper, (Supports Back-Connect Motherboards)
Side Panel4 x Sides Tempered Glass Panel
Dust FiltersBottom / Front / Top
Internal 3.5" Drive Bays4
Internal 2.5" Drive Bays5
Expansion Slots8
Front PortsPower, USB 3.0 x 2, Type-C 10Gbps x 1, Headphone/Mic Combo Jack
Fan OptionsFront: 2 x 200mm / 3 x 140mm / 3 x 120mm
Top: 2 x 140mm / 3 x 120mm
Power Supply Shroud: 2 x 120mm
Rear: 1 x 120mm / 1 x 140mm
Included Fan(s): 3 x 140mm at the front + 2 x 120mm reverse fans at the PSU shroud + 1 x 140mm at the rear
Radiator OptionsFront: 120 / 140 / 240 / 280 / 360 / 420mm (52mm thickness)
Top: 120 / 140 / 240 / 280 / 360mm (52mm thickness)
Max GPU Length495 mm
Max CPU Cooler Height190 mm
Max PSU Length230 mm
Dimensions547 x 250 x 622 mm
Shipping weight17.00 kg
Package size630 × 560 × 260 mm

Questions about this item

What clearance does the Antec 900 need for a 420 mm front radiator?

The front supports radiators up to 420 mm long with a maximum thickness of 52 mm, so allow at least that depth behind the three 140 mm front fans.

How are the four tempered glass panels removed, and which step do builders often miss?

All four 4 mm glass panels lift off tool-free; the step many miss is releasing the rear retention clips before pulling the panel away from the frame.

Which dust filters need regular cleaning on the Antec 900?

Clean the bottom, front and top magnetic filters every few months; they slide out without tools and can be rinsed and reused.

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