Looking for a little advice before i go any further. Bought the components in my price range to day to build a pc : Gigabyte Z87-HD3 Mobo I5-4670K 3.4 ghz overclocked to 4.2 Arctic freezer 7 pro custom cooling 8 gig of corsair vengeance-LP memory Corsair 430 PSU 2Tb Seagate HDD Im confident to a point in assembly of the components and have managed to get all the compontents into the case and powering. I dont yet have any OS installed and was just trying the basics .. entering BIOS. This is where im struggling , the Gigabyte - ultra durable splash screen appears and has the options to enter bios , boot info etc (and using the HDMI onboard GPU the splash screen seems zoomed in somewhat and cannot quite see all the image etc. When i press any other buttons to enter any of the mobo features it blinks . a mouse pointer momentarily appears then it black screens with the words : please reboot and connect a bootable device (or words to that effect) - i dont have an optical drive connected as yet. I was wondering if i should clear the cmos and try again , but im not sure what this will effect , would it effect the over clocked arrangement i have ? or am i missing something obvious... my first PC build for well over 10 yrs .. so just looking for a little heads up / guidance.