Ok so, I just got a build and ive installed everything correctly, even following my motherboards instructions and everything. When I go to plug the power cord into the PSU all my fans flicker and the light on my motherboard flicker as well. The fans twitch. I just bought a new motherboard thinking my old one was dead but obviously not. I even tried having just the cpu ram 24 pin and 8pin connected. Nothing else. And it still is doing this. Ive tried 3 different PSU's. My current one is new. Specs:Asrock extreme4 970. AMD FX 4100. Nvidia gtx 550ti. kingston 8gb ram. 350gb HDD. CoolMax 500watt PSU.