Today I put in a AMD FX 8 core in my motherboard and tried to open my computer. I can hear the fans inside but the lights on the power button don't turn on and my monitors are amber. I think it's my PSU because it's only 450 watts. My motherboard is a am2+ and the processor is a am3. On the instruction manual it says that am3 CPUs are compatable with am2+ motherboards. I'm new to all this computer stuff so I'm not sure what is wrong. Can someone tell me what to do??