MacBook 5,1 Late 2008 Boot Camp Geforce 9400 up to 512 MB VRAM

[NoMessaage]

Hello,

wikipedia says for the MacBook Late 2008, under graphics, that it should be possible to allocate up to 512 MB VRAM for the Geforce 9400 M while using Windows via Boot Camp

Integrated Nvidia GeForce 9400M with 256 MB shared with main memory
(up to 512 MB available in Windows through Boot Camp)

I have installed Windows 7 64 Bit via BootCamp and the 290.53 Nvida Driver but it still just allocates the 256 MB ?

Is there any option to change it?

thanks and best wishes