While buying a computer that is fully assembled may have its advantages in the short term, such as a slightly lower price, assembling a computer from after-market components may be more desirable for many reasons. All of the parts that go into a machine you assemble yourself can be hand-picked to ensure they are exactly what you need. Performance-robbing components, such as on-board graphics and sound, can be entirely eliminated from the machine. In addition, because each subsystem can be upgraded independently, older components can be replaced by components with the latest technology, allowing you to keep the machine much longer.
Step 1: Get Organized
Gather all of your components and lay them out in an organized fashion. Make sure you have the tools required--generally, you'll need at least a phillips screwdriver and possiby a torx driver (depending on your case hardware).
Ensure that you take precautions to prevent electrostatic damage to your PC's components. Ground yourself before touching any sensitive equipment. Always handle components by their edges. Avoid touching any contacts or metallic surfaces.
Step 2: Configure Computer Case
Step 3: Install CPU/Processor
Step 4: Install Memory (RAM)
Step 5: Prepare/Install Motherboard
Step 6: Install Hard Drives and CD/DVD Drives
Step 7: Install Video Card
Step 8: Install Accessories
Step 9: Initial Power-up
Step 10: BIOS Settings
Step 11: Install Operating System
