What features does the SilverStone GD09 case offer for cooling and dust prevention?

It has a positive air pressure design for excellent cooling and quietness, as well as quick access filters included for dust prevention.

What type of motherboards are supported by the SilverStone Technology GD09 Home Theater PC case?

The case supports SSI-CEB, ATX, and Micro-ATX motherboards.

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SilverStone Technology GD09 Home Theater PC (HTPC) Computer Case with Faux Aluminum Design for ATX/Micro-ATX Motherboards, SST-GD09B

Positive air pressure design for excellent cooling/quietness and dust-prevention
Supports SSI-CEB, ATX, Micro-ATX motherboards
Support SilverStone RA02 rackmount ears
Quick access filters included
Incredible 358mm depth to fit comfortably inside home theater cabinet