Wont start up. I just got the motherboard today and I tried to hook it up but I am not even

Question

I just got the motherboard today and I tried to hook it up but I am not even getting it to come on. using atx 450w p4 power supply

I installed a M870 v2.0 into my cooler master atx case replacing my old M868G but get no response when switched on, the fans run and wireless pci card lights up but no bleeps or boot on cd rom or floppy?