Cap file extension has asus bios update file type, developed by asus, which is associated with the "system files" category. construct is a game development program for creating directx games. projects created in this application are saved in files with the .cap extension.. Hi, i have an asus p8z77-v pro mb and i visited the driver download page and found that there had been an update to my bios, so i downloaded the driver and unzipped. it is in a format that i do. Rog strix geforce