Hi guy's I've recently purchased a brand new 6900xt and it's arrived today, problem is it has 3 8 pin connectors and my old gpu was using 1 6 pins one was a 8 pin split with a 2 pin to make it 8 pin, I have one more 8 pin tucked away inside all of the wires and cable management, I had my pc built so it's hard to work out where everything is, would using the two 8 pins I was using plus the other 6 pin get the card working or will I need a new psu and what is the cheapest one I could get? Thanks