Powering up the motherboard without a CPU Tags: CPUs Motherboards Last response: August 3, 2011 11:25 PM in CPUs Share d3mizzle August 3, 2011 11:14:56 PM I did this and all the fans that are connected to the mobo arent powering but the lights on the mobo do. Do you need a CPU in order for the fans to work or do I have a defective mobo or powersupply. More about : powering motherboard cpu chillin15 a b V Motherboard August 3, 2011 11:25:14 PM You need a cpu to even boot to bios...so yes, you need a cpu to do anything. I would not turn the mobo on without a cpu installed. Can't find your answer ? Ask ! Publish Related resources: ForumWould motherboard start up without cpu ? ForumCan I power on an Asrock Z77 Extreme4 motherboard without a CPU ? ForumStart a motherboard without cpu ( but power for cpu ) ? ForumMobo only powers up without the 4pin cpu power plugged in ForumMobo boots up without connecting cpu power ForumMotherboard is not powering up ...Need help. ForumNew motherboard not powering up ForumIS IT OK TO POWER MOBO WITHOUT CPU IN IT ForumConfig the CPU Voltage without frying the CPU on start up ForumHow long can I run a CPU without a heatsink and fan? ForumIf motherboard installed without standoffs will it short memory, cpu ForumPowering up but no screen picture ForumNew Motherboard/CPU /RAM - will not power up ForumMotherboard not powering on ForumBest Cpu cooler for ~40 More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !