The fan gets its power from the 3 pin motherboard connector and has a failure warning circuit built in. This is for the Celeron type processor.Replacement Fan for this item is ACC104351, or to replace with a fan that has a 4 pin plug, use ACC104151, PLEASE NOTE: The four pin type doesn't have a failure warning circuit. If you wish to see the other fans that we carry, click here for our CPU fan table.