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.