Geforce 7510M

I have HP V3751AU laptop which use Geforce 7150M. On the www.hp.com i shearched specification and result : Geforce 7150M up to share 287mb .
but when i login Bios, i see that the graphic only can up to 128mb.
Why is it? I use Vista ultimate 32 bit.
Everyone, who can help me? please.

Sorry my english. I’m from VietNam.

Wrong forum. Try asking here:
http://forums.nvidia.com/index.php?showforum=24