This 70mm tx3 dual ball bearing cpu cooler fan is a cost effective replacement fan for standard cpus as well as many different types of 1u or low profile cpu coolers that use a 70mm fan for peace of mind the cpu cooling fan features a tachometer pin on the tx3 motherboard connector that provides the host system with fan operating status while a dual ball bearing design helps provide smooth operation and longer fan lifespan air flow rate 2133 cfm color black connector types molex fan