internal graphics memory size

[nedro]

Hi all ,
i got gigabyte z77-d3h motherboard with intel 4000 graphics card
on the BIOS and in the peripherals section the internal graphics memory size i is set by default to 64 MB
i tried changing it to 1024 MB but after i save and exit i cant boot to the windows as the computer keeps restarting itself before even showing the windows logo..
i just get a blank screen then computer restart itself
the only way i get back working is setting it to to 64 MB

my question is: what i need to do to have the computer working after changing from 64 MB to 1024 MB

do i need to reinstall the windows , and if yes do i have to do that as a clean installation (format) or i can just do it by booting from disc and reinstall and overwrite existing files

waiting for your kind reply

[dmdilks]

That is the graphic size that you will go from 64 mb to 1024 mb. I might be wrong but you can't change it.

It will change it when you need that extra memory on it's own.   

[mikeyb5753]

how much ram do you have?