FX 6300 is a fair Monero (the biggest CryptoNight-based coin) miner, though the FX 8xxx does better (my FX 8370 generates a little higher Monero hashrate than my Ryzen 1700 when I'm doing nothing BUT mining on each machine).
AMD A-series APUs should do OK at Monero mining as well, but fewer cores and lower cache will limit them comparatively.
Ignore the moron that thinks mining with a small rig can't be profitable - it's HARDER but by no means impossible to be profitable with just a CPU or a rig with 1 or 2 recent GPUs in it, and tends to be MORE reliable than riser-based rigs.