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Enermax presents the compact budget version of the bestseller Ostrog case series. The Ostrog.Q comes with a large mesh front for best possible air circulation and optimal fresh air supply. On the top, the system is effectively protected with filters from dust.

The midi tower supports ATX and micro-ATX (m-ATX/µATX) mainboards. It comes with one 12cm rear fan ex work and is upgradable with five additional 12cm fans – two in the front, two at the side and one at the top. One 12cm fan is already pre-installed in the back.

Ostrog.Q offers screwless quick release fasteners for ODDs and 3.5” HDDs. It accommodates up to three 5.25” optical disk drives (ODD), three 3.5” hard disks and up to four 2.5” HDDs/SSDs. For high-end graphics cards with up to 390mm length and for an efficient fresh air supply from the front, the side bracket of the upper 2.5” cage can be removed and you can move one 2.5” disk to the bottom of the case. With the extruded side panels, Ostrog.Q provides more space for tower CPU coolers and for a comfortable hidden cable management behind the mainboard tray.


  • Ostrog.Q - Quest for Fortification
    Compact chassis for office workstations and gaming PC supporting ATX and micro-ATX mainboards. Plain and timeless design, refined black front panel with large mesh area. Black coated interior.


  • Upgradable & Performance-Capable Cooling System
    One 12cm rear fan included. Upgradable with five fans optionally: two 12cm front fans, one 12cm top fan and two 12cm side fans.
  • Excellent Passive Cooling
    Wide, air-permeable mesh front for optimal air circulation and an efficient fresh air supply. Integrated filter to protect the system from dust.


  • Multi-GPU Support
    Six extension card slots allow for the installation of two or maximum three graphics cards.
  • Full Gaming Power
    Removable upper 2.5” HDD/SSD cage clears the space for longer high-end graphics cards with up to 390mm length.
  • Supported Mainboard Sizes
    The Ostrog.Q supports ATX and micro-ATX (mATX/µATX) mainboards. Pre-assembled mainboard spacers for easy installation.

Data Storage Management & Interfaces

  • SSD ready!
    Three 2.5” trays inside the upper HDD/SSD cage. One 2.5” HDD/SSD can be installed in the bottom of the case inside the 3.5” HDD cage.
  • Ultra High-speed Data Transfer
    One USB 3.0 interfaces on the front panel for a lightning-fast data transfer with up to 5 Gb/sec.
  • Easy Accessible Front Interfaces
    1x USB 3.0, 1x USB 2.0 and audio I/O

Installation, Cable Routing & Operation

  • Extruded Side Panels
    More space for high tower CPU coolers and for a comfortable hidden cable routing behind the mainboard tray due to extruded side panel.
  • Optimal Dust Protection
    Anti-dust filters behind the mesh front and at the bottom of the case.
  • Quick and User-friendly System Installation
    Screwless quick release fasteners for ODD and HDD, thumb screws for side panels, cut-out for comfortable CPU cooler mounting and pre-assembled mainboard spacers.
  • Bottom-Mounted PSU
    Comfortable cable routing and optimized cooling performance thanks to bottom-mounted power supply. With anti-vibration rubber pads and cleanable dust filter at the bottom of the case.

Technical Details

Model ECA3351B-BT(U3)
Type ATX Midi Tower
Colour Black
Interior Colour
Dimensions (mm) D 453 x W 203 x  H 457
Drive Bays 5,25" 3x
Drive Bays 3,5"
Drive Bays 2,5"
I/O on top 1x USB 3.0, 1x USB 2.0, HD Audio
Cooling - Front optional: 2x 12cm fan
Cooling - Top
optional: 1x 12cm fan120mm radiator
Cooling - Rear
pre-installed: 1x 12cm fan | optional: 1x 120mm radaitor
Cooling - Side
optional: 2x 12cm fan
Max. Length Graphics Cards
280-390mm (depending on position)
Max. CPU Cooler Height
165mm (depending on side panel fans)
Extension card slots

Dealer Information

EAN Code
Carton - Net Weight
Carton - Gross Weight
Carton - Dimensions (mm)
D 490 x W 237 x H 499





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