I have a dell studio xps 8100, i3 540 3.06 ghz and windows ultimate 32 bits and 600 watts psu, and have 4 slots in motherboard and my maximum capacity of ram is 16 gb. But my question is what is my maximum ram per slot? Is it 4x4 = 16 gb or 2x8 = 16 gb? I already bought my kingston 1600 mhz 8gb singlestick and my rig can run only 1333mhz i know it fits me but i cant run my pc when i put my ram in my mobo. Does it affects or not and what would you recommend me so i can use my current 8g ram singlestick to change my windows to 64 bit? Can it be thnx for all your help. Kindly review my mother board because i dont know i need urgent answers thnx