Eren_Yaehger :
I was looking at upgrading from an i5 4460 and 970 to an i7 4790k and either a 1070 or a 1070 ti. My PSU is a 550w GS evga 80+ gold. Would I be able to the i7 and 1070 or would I need to upgrade my PSU?
Upgrade to the 4790k makes the most sense when you already have a Z87/97 MB. If not the non-k i7 would be better value. The 4790k with higher TDP will also require aftermarket cooler to keep it from throttling, unless you live in a very cold area.
The i7 will consume close to ~100W under maximum stress load and the GTX1070 ~180-200W; GTX1070Ti should be very similar to the GTX1080 ~220-240W, so you don't need to upgrade your PSU to power these upgrades.
@Judan:
Telling him to upgrade to 7700k is a very bad advice as he'd need to replace MB as well as buying new DDR4 memory. Not only that all those money would be for a Kabylake platform that is already well on the path to become obsolete by latest gen Coffeelake.