Hello

I have serious problem i bought yesterday new cpu and gpu ( i7-6700k and msi gtx 1660ti). When i changed cpu i tried to power on my pc but nothing hapend just fans were going and Dram led was lightning so i tried to pull out 2/4 memory sticks and put 2 memory sticks to slot 3 and 4 and it work pc started so i turn it off and put that 2 back so i had 4 memory sticks i turn it on and nothing happend but now cpu led is glowing any idea why ? In short with memory sticks in slot 3 and 4 it work and with 4 memory sticks it doesnt and cpu led is glowing. One more thing sometimes when i turn on pc with 2 memory sticks i get error "overclocking failed please enter setup to reconfigure your system"

My PC: Motherboard: asus z170a Cpu: intel i7-6700k Gpu: msi gtx 1660ti Power: corsair 650v Memory: 4x4 gb kingstone hyperx furry 2666mhz