How to Install a CPU
Safely align, seat, and lock an Intel or AMD processor into a motherboard socket, apply thermal paste, and secure the cooling assembly without damaging delicate pins.
- Read the tools, materials, safety notes, and steps below for free.
- Tap Start Camera Coach when you want hands-free voice help.
- Allow camera and microphone. Point your phone at the work; the coach watches your progress and tells you the next step.
🧰 Required Tools & Equipment
- ✓ Phillips #2 screwdriver
- ✓ Anti-static wrist strap
- ✓ Lint-free microfiber cloth
- ✓ 90%+ Isopropyl alcohol
📦 Materials & Supplies
- ✓ Compatible CPU (Intel LGA or AMD AM4/AM5)
- ✓ Motherboard
- ✓ Thermal paste
- ✓ CPU cooler with mounting hardware
⚠️ Safety Checkpoints & Warnings
- • Ensure power supply is completely unplugged from wall power and motherboard is unpowered.
- • Touch bare metal on an unpainted PC case or wear an anti-static wristband to discharge static electricity before touching the processor.
- • Never touch socket pins or the underside golden contact pads/pins of the CPU directly with bare skin.
📋 Step-by-Step Guide (6 Steps)
Prepare Workspace and Open Socket Retention Arm
Place the motherboard on a non-conductive surface, such as its original cardboard box. Push the metal retention lever down and slightly outward away from the socket to release it from its catch, then swing it upward fully into the vertical position. If working on an Intel socket, lift the hinged metal load plate upward as well.
- • Socket retention arm is standing upright past 90 degrees.
- • Metal load plate is swung back, exposing the socket cavity.
- • Forcing the lever upward without releasing it from the side retention hook first.
- • Placing the motherboard directly onto the conductive anti-static bag exterior.
Orient CPU Alignment Markers
Hold the CPU exclusively by its outer printed circuit board edges without touching gold pins or contact pads. Locate the tiny printed golden triangle on one corner of the CPU and match it directly with the etched triangle marking on the motherboard socket corner. On modern processors, also verify that the side alignment notches match the plastic guide keys in the socket walls.
- • Golden corner triangle on CPU matches the socket corner triangle precisely.
- • CPU alignment notches line up squarely with socket guide tabs.
- • Holding the CPU by the top and bottom metallic faces with bare fingers.
- • Rotating the CPU 90 or 180 degrees out of proper alignment.
Seat the CPU into the Socket
Lower the CPU gently straight down into the socket, perfectly parallel to the motherboard plane. Let gravity drop the CPU into place without applying any downward force or pressing down on the integrated heat spreader. Gently nudge the top edge lightly with a fingertip; the CPU should sit flush inside the socket frame with zero lateral play.
- • CPU substrate sits completely flat and recessed flush inside the socket bevel.
- • No edge of the green or black CPU PCB sticks up higher than the surrounding socket wall.
- • Pressing down hard on the CPU to force it into the socket.
- • Dropping the CPU in tilted, resting on top of alignment tabs.
Close and Lock the Retention Mechanism
Lower the metal load plate over the seated CPU substrate until it rests flat. Press the retention lever down firmly and hook it underneath the metal retention tab. Moderate mechanical resistance is completely normal here; continue pushing until the lever clicks securely under the retention clip.
- • Retention arm is locked flat underneath the socket retention catch.
- • Plastic protective socket cover pops off cleanly (on Intel boards).
- • Load plate bracket holds CPU PCB firmly clamped on both sides.
- • Stopping halfway out of fear when resistance is felt, leaving the CPU unsecured.
- • Failing to tuck the lever under the plastic/metal catch hook.
Apply Thermal Interface Material
If your CPU cooler does not have pre-applied thermal paste on its base, squeeze a small pea-sized dot (approximately 4-5 mm wide) of thermal paste directly into the center of the CPU's metallic integrated heat spreader. Alternatively, for large rectangular modern heat spreaders, apply a small central dot with four tiny dots near the corners.
- • A neat 4-5mm bead of paste rests centered on the top metal lid of the processor.
- • No paste overflowing onto the circuit board or socket frame.
- • Using half the syringe and flooding the motherboard socket with excess paste.
- • Manually spreading paste with bare fingers, leaving air pockets and oils.
Mount Cooler and Connect Fan Header
Align the CPU cooler base directly over the CPU mounting bracket holes and lower it straight down to avoid smearing paste unevenly. Fasten the mounting screws in an alternating diagonal pattern (top-left, bottom-right, top-right, bottom-left) half a turn at a time until hand-tight to ensure equal pressure. Finally, plug the cooler's 4-pin PWM fan cable onto the motherboard header labeled 'CPU_FAN'.
- • Cooler heatsink sits level with no wobble when gently grasped.
- • Fan connector is fully seated into the 4-pin 'CPU_FAN' header matching the plastic guide rail.
- • Leaving the clear plastic peel-off film on the bottom of the cooler copper plate.
- • Tightening one screw completely before starting the others, tilting the heatsink.
- • Plugging the CPU cooler fan into a 'SYS_FAN' or 'PUMP_FAN' header by mistake.
Credit: inspired by an original tutorial by Linus Tech Tips — watch the original on YouTube.
Don’t have everything?
- No Anti-static wrist strap? Grounding by touching an unpainted metal section of a plugged-in (switched off) PC power supply housing
- No Lint-free microfiber cloth? Coffee filter (does not leave lint residue)