Uma placa mãe série 5S com memória DDR3, @GB, 1333MHZ suporta duas placas de 4gb 1600MHZ.
This may depend on the motherboard capability. From our side, there are some boards with 5 series chipset that can handle memory at 1333MHz.
You can check for the Intel® motherboards at this link:
For more complete information about compiler optimizations, see our Optimization Notice.