Disclaimer

This manual is intended only as a guide for Antec's Computer Enclosures. For more comprehensive instructions, please refer to the user's manuals which come with your components and drives.

Basics

1.Take the case out of the box.

2.Remove the Styrofoam.

3.Remove the plastic bag.

4.Place the case upright with the power supply fan at the back facing you on a stable flat surface.

5.There are two side panels - one with a lever and one without. You need to take off both panels for motherboard and drive installation. Unscrew the Phillips head screws which fasten the panels. Swing out and remove the side panel without the lever first. Push the lever for

ward, swing out, and remove the other panel.

Note: Please don't try to use your finger nails to pry or lift the panels.

6.Inside the case you should see the power supply, some wiring (LED's etc.), an installed I/O panel, a power cord and a plastic bag containing more hardware (screws, brass standoff, plastic stands, etc.) and 12 pieces of Tension Clips (Drive Rails).

Motherboard Installation

This manual is not designed to cover CPU or RAM or expansion card installation. Please consult your motherboard manual for specific mounting instructions and trouble-shooting.

1.Lay the case down so that the open side is up. You should be able to see the drive cage and power supply.

2.Make sure you have the appropriate I/O panel for your motherboard. If the panel provided is not suitable for your motherboard, you may order different styles from Antec directly. Please visit www.antec-inc.com, under "Service and Support" and then I/O panels, which will show you the available I/O configurations.

3.Line up motherboard with standoff holes, and determine which ones line up and remember where they are. (Note: Not all motherboards will match with all of the provided screw holes, and this is not necessary for proper functionality.)

4.Lift up and remove your motherboard.

5.Screw in the brass standoffs to the threaded holes that line up with your motherboard. Some standoffs may already be installed.

6.Place your motherboard on the brass standoffs.

7.Screw in your motherboard to the standoffs with the provided metallic Phillips head screws.

8.Your motherboard is now installed into the case.

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Power Connections

ATX12V power supplies have a single 20-pin (single large) power connector to a 6- pin AUX Power connector and a 4-pin +12V power connector to the motherboard.

Note: ATX12V is a backwards compatible power supply. If your motherboard does not support the AUX Power Connector or the 12V connector, you can still use this power supply.

1.Connect the 20-pin ATX power connector and other power connectors to your motherboard.

2.Reset (labeled RESET SW) connects to your motherboard at the RST connector. The label should be facing the front of the case, and for all of the following connectors as well.

3.Power LED (labeled POWER LED) connector is located behind the Reset connector.

4.Power Switch (labeled POWER SW) connects to the PWR connector on the motherboard.

5.Speaker (labeled SPEAKER) connector is behind the PWR connector.

6.Hard Drive LED (labeled HDD.LED) connects to the IDE or HDD connector.

3.5" Device Installation

1.On the sides of the front bezel there are two tabs. Press the tabs to remove the top half of the bezel.

Note: You can see the external drive bays now. There are six 5.25" drive bays and one 3.5" drive bay assembly which can hold two 3.5" devices.

2.Unscrew the two silver thumbscrews located on the bottom of the drive bays and slide out the 3.5" drive bay assembly.

3.Install your floppy drive into the bottom drive bay. Mount the other 3.5" device into the top drive bay.

4.Slide the whole assembly back into the case and fasten it with the thumbscrews.

5.Inside the case, there are two internal 3.5" drive cages. It can hold

six 3.5" devices. Pull the quick release lever towards the rear of the case and release the cage. Put he cage on a flat surface.

6.Mount your other 3.5" devices into the drive cage.

7.Slide and lock the drive cage back into the case.

8.Find a small 4-pin white connector on the power supply and connect it into the male 4-pin connector on the floppy drive.

9.Connect a large 4-pin white connector from the power supply to the male 4-pin connector on each of the other devices.

5.25" Device Installation

1.There are six metal plates covering the 5.25 drive bays.

2.Carefully use your hands to twist the metal plate back and forth until

it breaks off.

Note: Don't break off the plates covering the drive bays that you are not using now.

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Antec SX1240 user manual Disclaimer Basics, Motherboard Installation, Power Connections, Device Installation
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SX1240 specifications

The Antec SX1240 is a well-regarded ATX desktop case known for its versatility and robust design. Originally launched as part of Antec's acclaimed SOHO series, the SX1240 has captivated both system builders and PC enthusiasts with its functional layout and impressive cooling options.

One of the main features of the Antec SX1240 is its spacious interior. It supports a standard ATX motherboard and has room for expansion, accommodating multiple hard drives and optical drives. The case offers drive bays specifically designed for 3.5-inch HDDs and 5.25-inch optical drives, ensuring that users can easily install and swap components.

The SX1240 comes with excellent cooling capabilities. It features multiple fan mounting points, including two pre-installed 80mm fans at the rear, providing efficient airflow to keep internal components cool. Users have the flexibility to add additional fans, which is crucial for high-performance systems or setups that generate a lot of heat.

Constructed from a combination of steel and plastic, the SX1240 is built to last. It features a sturdy exterior that can endure the rigors of regular use, while also providing ample protection for sensitive internal components. The case also includes a convenient side panel with a window, allowing users to showcase their builds with stylish lighting or custom cooling solutions.

The Antec SX1240 is designed with user-friendliness in mind. It features tool-less drive installation for both HDDs and optical drives, which significantly speeds up assembly and upgrades. The cable management options are also commendable, helping to keep the internal space organized and tidy, which in turn promotes better airflow and easier accessibility.

Aesthetically, the SX1240 has a classic yet modern appeal, with a clean front panel design and a sleek finish. The ports located at the front, including USB and audio connections, allow for easy access, catering to the needs of modern users who regularly connect external devices.

In summary, the Antec SX1240 is a reliable choice for anyone looking to build a high-performance PC. Its thoughtful design, excellent cooling options, and robust construction make it a standout case in its class, ideal for both gamers and professionals alike. Whether you are a seasoned builder or a newcomer, the SX1240 offers the features and flexibility needed to create a powerful and efficient system.
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