If an RGB power supply is key to your build, then the ASTRAPE
P1-750G 750W is an option. However, I think GAMDIAS has several points of
refinement to address before I would dive fully into this power supply.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips