Please as much as your power supply allows you to do so, do NOT daisy chain them on a high end modern GPU.
Use dedicated cables from the power supply for each of the 8 pins where ever possible even if it means a little more cable clutter.
Also not to scare you or whatever but I would personally avoid using a gigabyte power supply if you can at all avoid it.
https://youtu.be/7JmPUr-BeEM?si=Nu2NP-k5LpGcHXWc
Power supplies are the heart of your computer, while I understand it can be a sad thing to have to spend good money on, potentially limiting the amount you have to spend on more fun parts like cpus and gpus. It really is worth it in the long run. A good power supply will usually get me through 3 seperate builds and still be under warranty for the start of the third one.
I’d recommend something from be-quiet or from superflower as good options that are fairly affordable at least in my market tho mileage might vary.
Other good choices are Seasonic, and the upper mid range and higher Corsair (HX and up)