I searched my BIOS using the search tool and browsed through all the sub menus but could not find a setting named "IGD Minimum memory" but I found what I was looking for by switching my BIOS to classic mode. There was the exact option I was searching and it was named just like what I expected. It is called "IGD DVMT memory" under the configuration>video>IGD DVMT memory. Though the issue got solved for now as I changed the setting from "maximum DVMT" to "512 MB". But I wonder why it behaves strange when I put the setting as "Maximum DVMT" it shows only 64MB as dedicated minimum memory in the OS and when I change it to 512MB it shows 512MB dedicated memory. I found ASUS and others having an additional choice offering upto 1024MB to use as dedicated minimum memory. Why didn't intel use this ? Anyways the problem is solved for now. Thanks for the reply Kevin.