so im looking for a graphics card and wondering what the difference is between a MSI GeForce GTX 980 Graphics Card, and a Gigabyte GTX 970 Extreme addition. i've heard that every 980 will be better than any 970 even the worst 980's and seeing as the msi one i mentioned here is only $100 more i was wondering if it is worth it to spend that extra 100 dollars. I know if i get this i will have to invest in a new PSU as im running a 500w "crappy" power supply by tigerdirect ultra. So i want to ask and get other peoples opinions.