E1505 w/ X1400 How to Disable Hypermemory?

[FreshPrinceOfBellAir]

I got a Dell E1505 w/ X1400. It has 128mb on-board and 128 Shared w/ System. How can I disable the shared portion of the memory. I looked in the BIOS and couldn't find a setting for it?
Thanks

 

[xonik]

Try downloading the official drivers from ATi's site, and search through the display settings.