I'm building a budget APU system based on a Ryzen 7 5700G and have ordered everything except the PSU. I thought I'd use a 450W PSU from the budget line of known brands and upgrade it later if I ever get around to installing a power hungry graphics card. I was considering models like the CV450, XPG Pylon 450, Cooler Master MWE 450, Antec VP450P+, DeepCool PF450, etc.
Then I made a deal for a used GTX 970 for a good price and am wondering if 450W is enough. Old reviews indicate that the total wall power draw of a GTX 970 system with contemporary i5/i7 CPUs tops out at around 300W - roughly 250W output from the PSU. Based on those figures, it would seem that a decent 450W PSU (not high-end though) should be good enough. On the other hand, I know that working out PSU requirements is a tricky business that involves factors that are not immediately obvious from simple arithmetic calculations.
FWIW one of my old desktops uses a CX430 to power a Phenom II x4 970 with a GTS 450. Your advice please?
Then I made a deal for a used GTX 970 for a good price and am wondering if 450W is enough. Old reviews indicate that the total wall power draw of a GTX 970 system with contemporary i5/i7 CPUs tops out at around 300W - roughly 250W output from the PSU. Based on those figures, it would seem that a decent 450W PSU (not high-end though) should be good enough. On the other hand, I know that working out PSU requirements is a tricky business that involves factors that are not immediately obvious from simple arithmetic calculations.
FWIW one of my old desktops uses a CX430 to power a Phenom II x4 970 with a GTS 450. Your advice please?