Hi there,
U can use 8GB max. U can have 8GB in one slot, or 2x 4GB RAM sticks in each slot.
But the total is 8GB.
Specs:
Memory
DR3 PC3-10600, DDR3 PC3-8500
Memory Type: DDR3 PC3-10600, DDR3 PC3-8500, DDR3 (non-ECC)
Maximum Memory: 8GB
Slots: 2
Each memory slot can hold DDR3 PC3-10600, DDR3 PC3-8500 with a maximum
of 8GB Kit (4GBx2) per slot.*