First, if you were not having any problems, I suggest you may want to leave the bios settings as they were.
Second, your mobo manual explains what DVMT and IGD means. I seem to remember giving you a link to your mobo manual in your other thread. You`ll fine the post
HERE.
DVMT=Dynamic Video Memory Technology.
IGD=Integrated Graphics Device.
The DVMT if enable, which it should be, will allocate extra memory to the graphics processor as and when needed, so really, there shouldn`t be any need to alter it`s settings.
If you read the manual thoroughly, you`ll soon find out what all the settings are for. Just make a note of any setting, before you change them. Then, if the results of a change are undesirable, you`ll know how to set them back.
Regards Howard