So decided to upgrade my PC for the first time, not knowing id be way over my head. So i get a new GPU have the correct PSU but i get it anyways and find out the hard way i don't have enough. My PSU is only rated at 180w and from what ive read id need at least 500+. So i go back and bring the oldPSu to make sure i get something compatible. He tells me the other ones are not gonna fit and are not gonna work with my pc and i should go to lenovo.com and buy one there that is meant as an upgrade. Im not sure what to do nor do i know what will work. the PSU i have now is about 6in.x4in.x4in, length wise i have a lot more room but idk about the rest but i feel like it can be a bit bigger. There's 1-14pin connector and another 6 pin connector they both go into motherboard. I haven't found anything about that as well in terms of PSU compatibility. Now to answer my question is there a specific PSU i should look into or like the best buy guy said do i not have many options and have to find something LeNovo specific? He said my best bet is just build my own pc from scratch and ill have more freedom on what to do but im not sure i wanna shed out all the money. Im sorry im really a noob and know i probably have no clue what im talking about but any info would be appreciated.