The Deepcool MATREXX 30 SI is a compact mini-tower case in black, designed for those building a streamlined system using Micro ATX or Mini-ITX motherboards. Its structure combines ABS and SPCC steel with a panel thickness of 0.5mm, resulting in a lightweight chassis that weighs 3.62 kg and measures 405.8 by 193 by 378.2mm. Inside, you will find a practical layout with three 3.5" drive bays, two 2.5" bays, and a single 5.25" bay, though the latter is unavailable if you use a motherboard larger than 244mm in width. To keep your components cool, the case comes with a pre-installed 120mm rear fan and offers space for an additional 120mm fan at the front or a 120mm liquid cooling radiator at the back. It accommodates ATX PS2 power supplies up to 170mm long, CPU coolers up to 151mm in height, and graphics cards up to 250mm. For daily convenience, the top-mounted I/O panel provides quick access to a USB 3.0 port, a USB 2.0 port, and dedicated audio and microphone jacks. A 15mm cable management clearance helps you keep the interior tidy, making this a sensible choice for a home office or a small gaming setup where space is limited.