i suppose that its because shared ram,i doubt all 3 gb are being in use.
Can shared amount be possibly locked?
Would adding additional 3 gb of ram would increase performance?
i checked on GPUz, it says:
Memory size: 32mb
dedicated 58 (not constant)
dynamic 139 (not constant)
Notice, the bios is quite poor, i cant select there anything apart boot priorities, passwords, thats all.