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I don't know if it would work to parallel them, but you could at least get a bit more power by using one to power the slot and another to power the 8-pin.My understanding is the GPU is supposed isolate the voltage on the x16 slot from the voltage on the external power connectors, and that this is part of the PCI electromechanical specification somewhere. Meaning you can use two separate PSUs to power a gpu (one for x16 slot, one for 6/8pin) but you can never use two different PSUs to power separate 6/8-pin inputs. I have done this to my 3060ti in many various ways and not had an issue yet, but I wouldn't exactly call it safe for sure.
I don't know if it would work to parallel them, but you could at least get a bit more power by using one to power the slot and another to power the 8-pin.
My understanding is the GPU is supposed isolate the voltage on the x16 slot from the voltage on the external power connectors, and that this is part of the PCI electromechanical specification somewhere. Meaning you can use two separate PSUs to power a gpu (one for x16 slot, one for 6/8pin) but you can never use two different PSUs to power separate 6/8-pin inputs. I have done this to my 3060ti in many various ways and not had an issue yet, but I wouldn't exactly call it safe for sure.
