How is a dual-core processor with 8 GBs of RAM for gaming?

Well I'm learning about computer components and how they work but I'm still pretty noobish when it comes to it. I don't plan on playing heavy online games like BF4 or Crysis 3, the most I'll play online would have to be on Leauge of Legends and maybe on some Minecraft servers. Any help and advice about this?

I myself have a quad-core with 3.8 Ghz with 8 gigs of RAM, and I game fine, on Minecraft and LoL. As long as you don't hog the bandwidth with other programs, such as OBS or downloads, you'll be fine.

What is your video card?

your cpu might bottleneck some heavy online games though. But for minecraft or some MOBA games. It will run smoothly i think

It depends on the processing speed of the CPU in question. If it is say has a 2.6 GHZ processing speed you would be fine but only 1.5 GHZ would not be enough. You also need to know the quality of the graphics card. 8 GB of RAM is plenty.