The 9 series FX were a good idea, with bad architecture and timing. They are basically an FX 8350 on steroids. Same architecture, different firmware set voltages. They need one of only a few 990Fx (1 or 2 970 series) mobo rated for 220w+. Most of the FX mobo's are only rated for the 125w cpus at best. Oversized cooling is an absolute must, strongly recommended is a full custom loop. Anything less and even the 280mm or 360mm AIO's can have issues.
For a successful 9 series pc that's stable and worthwhile having, expect to spend $2k or better. Just understand that in most games it'll be beaten for fps, number crunching, gaming, rendering or other production apps by a Ryzen 3 setup costing ¼ of the price.
Is it good for gaming? It's ok. Getting to be very mediocre. It had a hard time keeping up with an i7-3770K in many instances. With what latest Ryzen and Intel cpu's can bring to the table, mediocre is getting worse by the minute.