Cooler Master MasterBox Q300L Installation Guide

Make It Yours.

Package Contents

The package contains the following items:

Case components (various screws, standoffs, etc. labeled A-G)
Manual

Language Support: English (EN), Arabic (AR), Bulgarian (BG), Chinese Simplified (CHS), Chinese Traditional (CHT), Dutch (NL), Farsi (FA), Hungarian (HU), Italian (IT), Japanese (JP), Korean (KR), Polish (PL), Portuguese (PT), Russian (RU), Spanish (ES), Serbian (SR), Turkish (TR), Czech (CS), Greek (EL), French (FR), Indonesian (ID).

Installation Steps

Step 1: Install Motherboard Standoffs

Attach the motherboard standoffs (B) to the case chassis as indicated in the diagram.

Step 2: Install Motherboard

Place the motherboard onto the standoffs and secure it with screws (C).

Step 3: Install PSU

Mount the Power Supply Unit (PSU) into its designated bay and secure it.

Step 4: Install Graphics Card

Remove the expansion slot covers, insert the graphics card into the appropriate PCIe slot, and secure it.

Step 5: Install Storage Drives

Mount SSDs and HDDs in their respective drive bays using the provided screws.

Step 6: Connect Cables

Connect all necessary power and data cables from the PSU and motherboard to the components.

Step 7: Install Fans

Mount fans in the designated locations within the case.

Step 8: Cable Management

Organize and secure all cables for optimal airflow and aesthetics.

Step 9: Install Side Panels

Attach the side panels to the case.

Step 10: Final Check

Ensure all components are securely installed and all cables are connected properly.

Step 11: Connect Peripherals

Connect your monitor, keyboard, mouse, and other peripherals.

Regional Support

Asia Pacific: Cooler Master Technology Inc., 8F., No. 788-1, Zhongzheng Rd., Zhonghe Dist., New Taipei City 23586, Taiwan (R.O.C.). Tel: +886-2-2225-3517
China: Cooler Master China, Room 2062, Floor 6, No. 421, Weiqing Rd., Jinshan District, Shanghai City, China. Tel: +86-21-51872177
Europe: Cooler Master Europe B.V., Lodewijkstraat 1b, 5652AC Eindhoven, The Netherlands. Tel: +31-(0)40-702-0900
North America: Cooler Master NA, 2929 E Imperial Hwy Suite 110, Brea, CA 92821. Tel: +1-888-624-5099
South America: Email: Soporte_Latam@coolermaster.com.tw

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