Can riser and GPU be on different power supply?

I’ve been looking for an answer on this and can’t find anything, I’m running 2 power supplies and the way it works out I’m having to use 2 molex connections from a different power supply to power the risers and another psu to power the GPU’s.
Is this ok to do?
Thanks.

while its best practice to run one gpu solely from the same psu, it will work powering the riser from one and card from the other. just make sure the riser is powered when booting.

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