bios settings for installing new gpu after using onboard?

Jaskaran498

Honorable
Dec 31, 2012
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10,690
Hello
I wanted to install a.new gpu in my pc. My mobo is asrock z77 extreme 4 and processor is Intel i7 3770k and my gpu is nvidia gt610 synergy 2gb. I know I inserted it correctly in pci express 3.0. But when I connect my lcd to hdmi port, lcd just goes into sleep mode (like it is.not connected to any gpu or something). So I guess, it has something to do with bios settings before installing gpu. Please tell me what to do in bios. My bios and drivers are latest version.

PS-.no need to tell me that I got a crappy gpu with a great pc. I know that already and I have my own personal reasons. So please stick to topic.
Thanks.