Linking combobox to combobox

Question

Hello guys,

 

can someone please tell me how to create a connection between two comboBoxes? For example, I have CPU brands in comboBox1, and I need to create a link to filter choices in comboBox2 ( where I have models of CPU) when I pick some brand from combobox1. My program is connected to database in MSSMS where I have all the data I need for my program.

 

Any help would be good, thank you in advance :)