How to Connect a Fractal Design AM4 Case to Your Computer

Connect the case to your power supply and motherboard first

The Fractal Design AM4 is a computer case, not a standalone device—it houses your motherboard, graphics card, storage drives, and power supply. To "connect" it to your computer, you are really installing your computer components inside the case and then plugging the case's power cables into those components. The case itself does not plug into anything external except the wall outlet through the power supply.

Start by placing the case on a flat, stable surface with the side panel removed. Ground yourself by touching a metal part of the case or wearing an anti-static wrist strap. This prevents static electricity from damaging sensitive parts. Have your motherboard, power supply, and all other components ready before you begin.

Key Takeaways

The Fractal Design AM4 case holds your motherboard and other components; it connects to power through the power supply unit that sits inside it.
Install the I/O shield (the metal plate that comes with the motherboard) into the rectangular opening at the back of the case before mounting the motherboard.
find the motherboard to the case using the brass standoffs and screws that come with the case, aligning the motherboard screw holes with the standoff posts.
Connect the 24-pin ATX power cable and the 8-pin CPU power cable from the power supply to the motherboard, then route cables through the case to keep airflow clear.
Plug the front panel connectors (power button, reset, LED lights) from the case into the small pins on the motherboard's front panel header.

Install the I/O shield and mount the motherboard

The I/O shield is a thin metal rectangle that comes with your motherboard. It fits into the rectangular cutout at the back of the case and protects the ports on your motherboard from dust and physical damage. Press it firmly into place from inside the case until it clicks and sits flush with the case opening.

Next, install the brass standoffs into the case. These are small cylindrical posts that screw into the case and hold the motherboard at the correct distance from the metal case (which would short-circuit the board if it touched directly). The Fractal Design AM4 comes with pre-installed standoffs, but check that they line up with the screw holes on your motherboard. If they do not, unscrew the misaligned ones and move them to the correct positions.

Carefully lower the motherboard into the case, aligning the screw holes with the standoffs. The motherboard's rear ports should face the I/O shield opening. Once aligned, screw the motherboard down using the small screws provided with the case. Tighten them firmly but do not over-tighten—you should feel resistance, not force.

Connect the power supply cables to the motherboard

The power supply sits in the bottom rear of the Fractal Design AM4 case. Two main cables run from the power supply to the motherboard: the 24-pin ATX power connector and the 8-pin (or sometimes 4-pin) CPU power connector. These are keyed connectors, meaning they only fit one way—do not force them.

Locate the 24-pin socket on the motherboard (usually near the right edge, below the RAM slots). Align the 24-pin cable connector and push it straight in until it clicks. Then locate the 8-pin CPU power socket, which is almost always near the top of the motherboard, above the CPU socket. Insert the 8-pin connector and push until it clicks.

If your power supply has separate 4-pin and 4-pin connectors instead of a single 8-pin, you can plug both into the 8-pin socket on the motherboard—they will sit side by side. Route these cables behind the motherboard tray (the metal panel behind where the motherboard sits) to keep them out of the airflow path. Use the cable routing holes in the case to guide them.

Connect the front panel connectors

The Fractal Design AM4 case has cables running from the front panel that connect to small pins on the motherboard. These carry signals for the power button, reset button, and LED lights. Locate the front panel header on your motherboard—it is a small block of pins, usually in the bottom right corner of the board, and is labeled in your motherboard manual.

The case cables are labeled: PWR_SW (power switch), RST_SW (reset switch), PWR_LED (power light), and HDD_LED (hard drive activity light). Match each cable to its corresponding pin on the motherboard header. The power and reset switches are not polarized, so they work either way. The LED connectors are polarized—the red or positive wire should align with the positive pin (usually marked with a plus sign or a different color).

Push each connector firmly onto its pins until it sits flat. If the pins are small and difficult to see, use your motherboard manual as a guide—it will show you exactly where each connector goes. Take your time here; loose connections are a common reason why the power button does not work.

Install storage drives and connect their power

The Fractal Design AM4 has bays for 2.5-inch solid-state drives (SSDs) and 3.5-inch hard drives. SSDs typically mount on the back of the motherboard tray or in dedicated 2.5-inch bays. find them with the small screws provided. Hard drives mount in the 3.5-inch bays at the front or bottom of the case and also screw in place.

Once the drives are mounted, connect SATA power cables from the power supply to each drive. SATA power connectors are L-shaped and keyed—they only fit one way. Push the connector straight in until it clicks. Then connect SATA data cables from the motherboard to each drive. These are flat, thin connectors that also only fit one way. Route all cables behind the motherboard tray to maintain airflow.

Install your graphics card and other components

If you are using a dedicated graphics card, locate the PCIe x16 slot on the motherboard (the longest slot, usually below the RAM). Remove the slot cover from the back of the case by unscrewing or unclipping it. Align the graphics card with the slot and push it straight down until it clicks into place. Screw the card's bracket to the case. Then connect the PCIe power cables (6-pin or 8-pin) from the power supply to the card if it requires them.

Install RAM by opening the clips on either end of the RAM slots, aligning the notch on the RAM stick with the key in the slot, and pushing down until the clips snap closed on both ends. Install your CPU according to your motherboard manual—this varies by processor type. Install any additional fans or cooling equipment according to their instructions.

Route cables and close the case

Before closing the case, check that all cables are routed behind the motherboard tray or through the cable management holes in the case. Loose cables block airflow and can hit spinning fans. Make sure no cables are pinched between the case and any components. Verify that all power connectors are fully seated by gently tugging on them—they should not move.

Once everything is find and routed, replace the side panel and screw it in place. Plug the power supply into a wall outlet (make sure the power supply switch on the back is set to ON). Press the power button on the front of the case. Your motherboard should light up, fans should spin, and you should see output on your monitor if a graphics card and monitor are connected.

Frequently Asked Questions

Do I need to install standoffs before putting the motherboard in?

The Fractal Design AM4 comes with standoffs already installed, but you should verify they line up with your motherboard's screw holes. If they do not match, unscrew the misaligned ones and reposition them. Never skip this step—the motherboard must be elevated above the case metal or it will short-circuit.

What if the 24-pin power connector does not fit?

The 24-pin connector is keyed and only fits one way. If it does not slide in smoothly, do not force it. Rotate it 180 degrees and try again. If it still does not fit, check that you have the correct cable from the power supply and that the motherboard socket is not damaged or blocked by another component.

Can I connect the front panel power button cables backwards?

The power and reset button connectors are not polarized, so they work either way. The LED connectors are polarized—if you connect them backwards, the light straightforward will not turn on, but it will not damage anything. Swap the connector around if the LED does not light up after you power on the system.

Where do I plug in the USB headers from the case?

The case has internal USB headers (usually USB 3.0 and USB 2.0) that connect to corresponding headers on the motherboard. Locate these headers in your motherboard manual and push the case connectors onto them. They are keyed, so they only fit one way. These allow the USB ports on the front of the case to work.

What should I do if the computer does not power on after connecting everything?

Check that the power supply switch on the back of the case is turned ON. Verify that the 24-pin and 8-pin power cables are fully seated on the motherboard by gently tugging them. Confirm that the front panel power button connector is properly installed on the motherboard header. If the power supply fan spins but nothing else happens, the motherboard or CPU may not be making contact—reseat both and try again.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.