1) As long as they are the same memory type, rgb doesn't matter.
2) I've not seen a "white" rating. Depending on usage, I would recommend a tier I (gaming/heavy use) or tier II model> https://www.gamingscan.com/psu-hierarchy/
2) I've not seen a "white" rating. Depending on usage, I would recommend a tier I (gaming/heavy use) or tier II model> https://www.gamingscan.com/psu-hierarchy/