Computer case question

Simple measuring will give you the answer. You will also need to figure if the cards cover any slots you will use. Some will block access. For the power supply, I recommend antec, corsair, enermax, or seasonic for high end cards. 850w is about minimum for two cards. My silverstone 750w full modular has 60 amps on a single 12v rail. The owner upgraded to 1000w in the same brand. I don't know who manufactures silverstone, but mine used was only $55. I use onboard graphics; bought it for full modular feature.

I should've specified that i have neither of these parts yet and i don't know if the cards will fit in this case