A basic motherboard will not have a bios that allows such controls.
Do you really need more than 8gb?
For the most part you really should not need it.
If you really do want 16gb, return the ram you bought and buy a supported 16gb kit of 2 x 8gb.
Go to the Kingston web site and access their ram configurator app.
Enter your pc make/model, and you will get a list of supported upgrades.