Mikeny
Sadly since I built this computer ive been to busy to really game with it. From the few times I do have time to play I haven't seen any issues with the 980. My system just runs on factory settings with all my games set to max settings with no FPS issues.
There is no need to go over 16GB of ram for gaming, most people would say 8Gb is fine for gaming. My top 5 ram manufactures are Mushkin, G.skill, Kingston, Corsair, and Crucial in order of what I would buy. Corsair would be first if they didn't put a premium price on their ram. Back when I had my i7 950 build I did a test between Mushkin and corsair and the mushkin ram would overclock higher with lower cas# then the corsair ram, from that day on I have always bought Mushkin ram with no failures to date. The sticks I have now have overclocked to 2800Mhz cas 11 with no errors, which is lower cas then any stick you can buy right now.