VGA Card Ram sharing problem'ane please HELPP MEE

[Altire]

machanla kawuruth dannawane mama gawa thiyenne 8800gs xfx alpha dog edition VGA eka eka 384mb.but in nvidia display properties it shows as 1658mb.its sharing some Ram.i have dual monitors with my onboard vga enabled.

Dual core 2.8
3GB Ram (1gigi+2gig)
vgacard xfx 8800gs ALPHADOG EDITION

How to stop this ram sharing????help

 

[4keven4]

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samahara welawata mathak oka enawa