How to stop Windows Sharing System Memory

[neephius]

I have a asus p6td deluxe board with 24GB ddr3 1600Mhz 2 nVidia GTX 295 Cards in SLi not overclocked YET
and i7 975 EE why is the system alocating system memory to the cards when they have 1795Mb available as dedicated GDDR3.?? any one really know the answer. or are we all just shooting blanks

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[Hawkeye22]

Why not share it? It doesn't get used unless needed. With today's high res monitors, large textures, AA, and other eye candy, graphics can use lots of memory... and with 24Gig in your system, you have more than enough memory