Something to clean the thermal paste off the current CPU Some new thermal paste to apply to the new processor An anti-static wrist strap or ESD grounding mat
Attach the anti-static strap to yourself and to an earthing point - a radiator works perfectly. Unscrew the CPU cooler/heatsink and detach any cables that might get in the way. Set the screws aside and carefully pull the cooler off. Apply some small drops of thermal paste removal solution to your lint-free cloth. Wipe the worst of the compound off the CPU taking care not to get moisture or mess on your motherboard. Repeat this process with the cooler/heatsink. Apply the purifier to another clean cloth and apply that on both the CPU and cooler/heatsink. Remove the lever holding the CPU in place, lift up the flap and gently remove the old CPU by lifting it by the corners. Ready the new Intel CPU, remembering the gold arrow in the bottom corner should point that way when installed. You’re installing the new CPU in the same way the old one came out. Carefully and gently push the CPU into place. Replace the flap and ease the lever back into place to hold it down. Ready the new thermal paste. Apply a small amount of thermal paste in a pattern that will cover the entire CPU but not come out of the edges. Replace the CPU cooler, reattach and tighten the screws to keep it in place. Remember to plug all necessary cables back in.
