Is Corsair CX650M good for my system?

Solution
Your system (no GPU?) will draw under 100w. Even a 300w power supply is more than enough, if there was a good one. 650w is just wasting money.

550w would allow for a CPU + GPU upgrade, e.g overclocked i7 8700k + GTX 1080ti.

You may even find a better quality 450w PSU than that CXM 650. Quality can bring your problems. Wattage, in your case, won’t.
Your system (no GPU?) will draw under 100w. Even a 300w power supply is more than enough, if there was a good one. 650w is just wasting money.

550w would allow for a CPU + GPU upgrade, e.g overclocked i7 8700k + GTX 1080ti.

You may even find a better quality 450w PSU than that CXM 650. Quality can bring your problems. Wattage, in your case, won’t.
 
Solution