Remove the PCI card by pulling it out towards the side of the device.
Be careful about touching the top and bottom of the card! The static electricity in your fingers could short it. If you can, only touch the metal bracket and the sides of the card.
Remove the RAM by pulling it out towards the side of the device
Be careful about touching the top (right) and bottom (left)sides of the RAM! The static electricity in your fingers could short it. If you can, only touch the top and bottom of the RAM.
If replacing RAM, make sure it is the right type, speed, and size for your computer. Otherwise the RAM may not fit or your computer may not start up.
Remove the cpu cooler by pulling out towards the side of the device.
Make sure you do not touch where the cpu cooler makes contact with the processor! You do not want to contaminate the thermal paste that separates these components.
When replacing your cpu cooler, make sure you clean the processor contact area on the cooler and processor with isopropyl rubbing alcohol.