The RTX 2080 Super is a power-hungry card. Nvidia recommends using a 650W PSU. Don’t get carried away with upsells recommending 1000w PSU. It can run on 550W PSUs but it’s a bad idea as high loads can severely reduce the lifespan of a PSU. A 650-750W PSU should be considered which can provide ample overhead as well, in addition to satisfying all the power needs of the 2080 Super. Anything under 600W for the RTX 2080 Super is a bad idea due to sudden spikes in power draw that can trip most PSU protections.