I am planning to buy G.Skill RipjawsX DDR3 8 GB (2 x 4 GB) (F3-12800CL9D-8GBXL) and Sapphire AMD/ATI Radeon R9 270X with Boost OC 2 GB DDR5 to replace my previous RAM and graphics card. Will they be compatible with the ASUS M5A78L-M LX motherboard? Also can I use a Corsair SMPS CX500 500 Watts PSU to power these up?