shamsul_arefin :
I have chosen Sapphire rx 480,antec true power classic 750w gold, i5 6500. What's your suggestion?. Will this power supply overkill?
- Get at least 16GB of RAM
- Grab a FreeSync 1080p monitor
- A nice SSD for OS would speed up nicely your boot.
And yes, 750W is overkill for you system. As stated above, 550W would be enough.