ATI 9250 256mb VGA shows only 64Mb

[tomriddle]

Hey guys
i purchased a 256MB ATI 9250 VGA recently
but my vga shows only 64mb memory

my motherboard is an ASUS p4s-x with the SIS 962L chipset
my AGP is 4x

please help me and tell me how i can get 256

 

[Tha General]

Did you disable the onboard graphic driver first?

 

[tomriddle]

Vga

Well..
my motherboard doesn't hav onboard VGA

also note that i changed a setting on my BIOS
there's an option called "Graphics Aperture Size"
earlier it was 64..i changed it to 256..but still im getting only 64mb VGA

please help me out

 

[kpo6969]

Where exactly are you showing only 64mb video memory? What screen? Do you know what you're changing in the bios? 64x4=?
Post a screenshot showing only 64mb.

 

[tomriddle]

Vga

I hav attached the screenshot