mery pass hp compaq dc7900 desktop pc hai..... us ma intel[R] GAM 4500 chipset ha ......us ka vga 796mb show ho rha ha........??????

mery frnd k pas b same yahe pc ha lakin us ka vga 296mb show ho rha ha.......
ik ur frnd k pas ha us ka vga 1700mb show horha ha ...................
ya kya chakr ha...........???????