I am currently building a computer and I had a reliable friend look over my list. He said everything was okay except I should go for a higher PSU watt. I was running with a 600w EVGA PSU. My build consists of a i5-4690K, EVGA GeForce GTX 970, and 8gb of ram (idk if anything else matters much). Will a 600w PSU be suitable for this? Because I am right at my budget limit and I do not know if I can go much higher. I am also open for recommendations. Thank you.