Ohh, minecraft optimization leaves much to be desired. I've a FX 6300 like you do and a r7 370 4GB and I get higher fps than you, like 90 in avg i'd say, I didnt't really run a benchmark though. Optifine seems to increase performance by a LOT, when I say a lot I'm talking I got like 200 avg with multi-core enabled, though with that it gave me some problems and crashes so I disabled it. Without multi-core I get around 150. I'd suggest to first monitor your hardware's usage, CPU, GPU and RAM allocation. Make sure you have java x64 installed, doesn't really matter which version, but if you feel like it, update it.For CPU and GPU use MSI Afterburner and see if the 380 is running at the core clock it's meant to be and there're no dips below that, check temps in both CPU and GPU. Then try allocating more ram to minecraft, I usually go for at least 3GB since I make a lot of redstone contraptions and machinery, but 2GB should be enough. Try lowering the render distance, at 12-15 chunks it gets below 60 without optifine on my config. More than 16 chunks gets super choppy.