Dell offers a number of different system options for its OptiPlex GX280 line of computers, each with a different style of tower casing. Regardless the outward appearance, each computer houses a fan located directly above the CPU called a heat sink. This component is designed to help dissipate the heat generated by the CPU while in operation, and prevent the important chip from overheating. Various factors can cause the heat sink to malfunction, leaving your CPU, and entire computer tower, vulnerable to heat build-up.
Outdated BIOS
The files responsible for controlling the speed and operation of the GX280's internal fan and heat sink are located in the machine's BIOS software. The BIOS is built into the motherboard, and can become outdated over time, causing inefficient operation of other components. Check Dell's support website for any updates associated with the BIOS files on your system. Updating the BIOS can be risky for novice computer users, as any mistakes installing the new files could render your machine useless.
Loose Cooling System
As fans operate, they can vibrate their casing and eventually work their connections loose from the system's tower. A loose fan or heat sink may not work as efficiently as a properly secured one and allow heat to build internally. Check the connections of the heat sink and fan to ensure they are all tight and secure, and verify that the components are seated properly.
Accumulated Dirt
A dirty heat sink will not work as effectively as a clean one, and airborne dirt, dust and lint will accumulate on the cooling component over time. Power down your GX280 and open the tower to inspect the heat sink and fan for collected dirt. Use canned air to blow the debris off the cooling system, or use a soft-bristled brush or clean cloth to wipe away any stubborn dust. You may need to disconnect and remove the heat sink to clean it thoroughly.
Dried Thermal Paste
A thin layer of a substance called thermal paste is sandwiched between the CPU chip and heat sink to help move the heat more efficiently. Over time, this paste can dry out and fail to help with heat dissipation. Most electronics stores sell replacement paste, also known as thermal compound or grease, to allow you to renew this protective layer. Use your owner's manual to remove the heat sink, clean the CPU with some rubbing alcohol to remove the old paste and add a fresh coat of thermal conductor.
Tags: heat sink, BIOS files, heat sink clean, over time, remove heat