You'll definitely get over 80 FPS, easy. The i5 alone with Intel HD Graphics and sometimes get that much. Just install Optifine and pretty much any hardware can perform well with Minecraft. Since you have a dedicated GPU, you shouldn't have any problems. In response to Skyrim, I bet you could play on Minimum settings. You might be able to play on Medium, but I don't have much experience with that particular GPU. I can play most modern games at 40 or so FPS on Low and 30 on Medium (Skyrim, etc.) with a 7350 an AMD FX. In Minecraft I get about 100 FPS on normal settings and 50-60 FPS stable at max settings on a 1080p monitor. You should be fine!