Multi-core processors look like single core processors.
Pentium D processors were Intel processors at the beginning of the Pentium dual core processor types of CPUs. Pentium D processors ran hot and were limited by heating issues, so Pentium moved on to slower clocked Dual Core processors. Upgrading from a Pentium D is probably a good idea, especially if you are experiencing problems.
Instructions
1. Read your computer or motherboard manual to determine if your motherboard can support a different processor. Most motherboards can only handle certain processors. Purchase a CPU that will fit your motherboard.
2. Open the computer case by unscrewing the access door from the back of the computer. Pull the door out and set it aside. Unplug the computer. Unscrew the fan and heatsink from the motherboard. You may have to use pliers to release the heatsink from the motherboard. Be careful not to break the heatsink or the motherboard. Lift the CPU bar and pull the Pentium D out.
3. Match the new CPU with the CPU opening on the motherboard. A corner of the CPU and a corner of the CPU slot on the motherboard will each have a pin and pinhole missing. Use this to match them up. Close the bar to hold the CPU in place. Put some thermal grease on top of the CPU.
4. Screw the heatsink and fan into place on top of the CPU. Close the computer door and screw it back in place. Plug the computer back in.
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