After recently purchasing a RTX 3070 to upgrade from my AMD RX 580, I quickly found out my old power supply would not be up to the job. What I found was I didn’t have a dual 8pin connector for the graphics cards and my 12V rails were split into two. Many of today’s new PSUs have the 12V rail combined into one in order to provide the amps required.
Below is a table that can help you with picking the best PSU for your new Nvidia GPU. I hope it helps you choose the right PSU for your PC build.
Ampere Series
| Intel i5 AMD Ryzen 5 | Intel i7 AMD Ryzen 7 | Intel i9 AMD Ryzen 9 | Intel HEDT AMD Threadripper | |
| RTX 3090 | 750W | 750W | 850W | 1000W |
| RTX 3080 | 750W | 750W | 850W | 850W |
| RTX 3070 | 650W | 650W | 750W | 850W |
Turing Series
| Intel i5 AMD Ryzen 5 | Intel i7 AMD Ryzen 7 | Intel i9 AMD Ryzen 9 | Intel HEDT AMD Threadripper | |
| RTX 2080 Ti | 650W | 750W | 750W | 850W |
| RTX 2080 Super | 650W | 650W | 750W | 850W |
| RTX 2080 | 650W | 650W | 750W | 850W |
| RTX 2070 Super | 550W | 650W | 650W | 750W |
| RTX 2070 | 550W | 650W | 650W | 750W |
| RTX 2060 Super | 550W | 550W | 650W | 750W |
| RTX 2060 | 550W | 550W | 650W | 750W |
| GTX 1660 Ti | 450W | 450W | 550W | 650W |
| GTX 1660 Super | 450W | 450W | 550W | 650W |
| GTX 1660 | 450W | 450W | 550W | 650W |
| GTX 1650 Super | 450W | 450W | 450W | 550W |
| GTX 1650 | 450W | 450W | 450W | 550W |