Thank you for your answers. I still have a couple of questions about PSU's. Sorry if I sound dumb, I am very new to this lol

For now, let's say I only have 7x3070. One 3070 card needs a 2x8pin connection, so that means I need two 8pin both end cables to run one card, right? If so, that means I need a PSU with 2*7=14 PCIE slots? I am not including risers because someone suggested me using splitters that go from the cable that plugs in the card.

Also, I saw that there is a Delta electronics DPS-2400ab PSU and I am not sure if I can use it, as it has 6pin slots in it. https://skelbiu-img.dgn.lt/1_18_3067164755/psu-evga-1000w-g2-antec1000w-2600w-platinum.jpg
https://skelbiu-img.dgn.lt/1_18_3067165501/psu-evga-1000w-g2-antec1000w-2600w-platinum.jpg