Hi there 
My current rig is:
CPU AMD FX6300
MoBo ASRock N68-VS3-FX
2x4GB Corsair Vengeance LP DDR3 PC3-12800, 1.600 Mhz, C9
SSD 120 GB Kingston SSDNow v300 for OS
SSD 250 GB Samsung 850 EVO for Gaming
HDD 1TB WD Blue for Storage
GPU: RX 480 4GB Sapphire NITRO+ OC
PSU: Antec 650w (quite old)
I have CPU and MoBo since years and the MoBo it have the USB controller burnt (I'm using USB card). Also FX6300 is bottleneck for the RX 480.
So I want to buy a new CPU and new MoBo and leaving everything else.
What I'm looking for:
CPU: i5-6500 - 197€ on Amazon (discounted)
MoBo: Gigabyte Z170-HD3 (because it supports DDR3) - 90€ on Amazon (discounted)
Overcloking is not on the road at the moment so I should be fine with the stock heatsink
What do you think about this? And what for a budget and discrete PSU?
Thank you.

My current rig is:
CPU AMD FX6300
MoBo ASRock N68-VS3-FX
2x4GB Corsair Vengeance LP DDR3 PC3-12800, 1.600 Mhz, C9
SSD 120 GB Kingston SSDNow v300 for OS
SSD 250 GB Samsung 850 EVO for Gaming
HDD 1TB WD Blue for Storage
GPU: RX 480 4GB Sapphire NITRO+ OC
PSU: Antec 650w (quite old)
I have CPU and MoBo since years and the MoBo it have the USB controller burnt (I'm using USB card). Also FX6300 is bottleneck for the RX 480.
So I want to buy a new CPU and new MoBo and leaving everything else.
What I'm looking for:
CPU: i5-6500 - 197€ on Amazon (discounted)
MoBo: Gigabyte Z170-HD3 (because it supports DDR3) - 90€ on Amazon (discounted)
Overcloking is not on the road at the moment so I should be fine with the stock heatsink
What do you think about this? And what for a budget and discrete PSU?
Thank you.