at the moment i have 8600gt, i want to buy a new card that will match the advance usage of Maya and 3d studio application
preferred a geforce not quadro(under budget)
my hardware :
6G memory (1600MHz)
What is your budget? What you are describing is a professional or workstation class GPU, like the ATI/AMD FirePro/FireGL and Nvidia Quadro series. You can also get by with an ATI/AMD HD48XX/HD58XX/HD68XX or higher. One of the higher end Nvidias will also work. Goes back to your budget.