RTFM, lol
Everything motherboard is different. Some motherboards have an 8pin, but only require an 8pin plug for higher TDP CPUs, whereas lower TDP CPUs on the same socket can pass by with only a 4pin connector.
General, if a power supply supports 8pin CPU power, it will have a CPU labeled 8PIN plug that splits into two 4pins.
Now, I doubt that your Celeron really draws enough power to require an 8PIN, but it could be required by your motherboard depending on how it distributes power.