i was thinking myb changing MB to MSI Z170A KRAIT GAMING 3X
is Onboard Video card needed ...i dont think so..or am i wrong..
and why is RAM no good..please explain...kinda new to this thing...
P.S. this PC will be just for gaming....
The memory I linked is faster and does not cost much more. In some games it will give you few more FPS (I've seen up to 10FPS).
There is no onboard video card. But any i3, i5 i7 CPU has integrated video. Motherboards just have the connectors.
About MB, z170 going with K series like i7-6700K, other chipsets going with cpus like i7-6700 (without K). You can mix them, but this will be not optimal since you are not going to use either MB or CPU overclocking feature. The word GAMING is not important - pure marketing.
Another thing, don't buy founders edition. In a week or two, you will be able to buy better cards for lower price.
Keep in mind, that you are going to spend 1700-2000$ (us prices) on this build. So you probably want to take a serious approach. That means we start with what for you are going to use it. Gaming is good, but what games, on what monitor (resolution and refresh rate). After that it would be nice to have the list of parts you have and parts you need/want to buy.