Grant Fritchey - Wednesday, August 30, 2017 8:54 AM
In addition to MAXDOP, it's a good idea to set the Cost Threshold for Parallelism to a higher value than the default of 5. Out of the box. You'll see fewer plans going parallel unnecessarily if you make that adjustment.
+1 to Grant's suggestion. I've heard this same thing for years now and I have set CTFP to 50. It did nothing but good things because almost everything didn't go parallel.