CPU fans connect to the motherboard for power.
Most every desktop computer with an Intel processor requires a CPU fan and a heatsink, because the processors get very hot; without these tools to dissipate the heat the computer would shut down. The fans usually last several years or more but do sometimes go bad sooner. CPU fans are inexpensive and simple to replace. Make sure you buy the right size fan for your CPU.
Instructions
1. Open the computer case by removing the screws on the back of the case door on the left side of the computer.
2. Locate the fan on top of the CPU and heatsink. The fan is usually a square about 2 by 2 inches. Unscrew the fan. There is a screw in each corner, totaling four screws.
3. Pull the power cable that is connected to the fan straight up from the motherboard. Screw the new fan in place and connect the power cable. Close the computer and restart.
Tags: power cable