Can I use a 150W+ GPU on a 25W PCIe slot + the 4/6pin PCIe PSU cable?
I have a PCIe slot on my motherboard with a 25W power limit and I want to add either an RX 570 4GB (~150W) or a Radeon HD 7950 3GB 3GB (~200W), I’m not yet sure which one, but most likely the RX 570. I won’t be switching my motherboard or PC due to costs so that’s not an option (please don’t suggest this). I want to connect the GPU to the 25W PCIe slot and use the 4/6pin (or whatever) PCIe connector from the PSU. Would the 4/6pin cable provide the extra 50W needed that the PCIe slot isn’t giving and allow it to boot and function normally? Or would the GPU be expecting 75W from the PCIe slot and not work even if the 4/6pin cable is providing enough power to cover the rest of the GPU’s TDP?