Your model, Asus G73SW-BST6, came in two flavors:
1. Intel® Core™ i7 2630QM and DDR3 1333 MHz SDRAM, 4 x SO-DIMM socket for expansion up to 16 G SDRAM (Quad Core).
Quad Core CPU model can support 4xSO-DIMM, up to 16GB DDR3 1333 MHz DRAM (Total 32G RAM?)
2. Intel® Core™ i5 2410M and DDR3 1333 MHz SDRAM, 2 x SO-DIMM socket for expansion up to 8 G SDRAM (Dual Core).
Dual Core CPU model can support 2xSO-DIMM, up to 8GB DDR3 1333 MHz DRAM (Total 16G RAM?)
Th above information is on this page:
https://www.asus.com/Laptops/ROG-G73SW/specifications/Any other CPU might not be supported within the latest BIOS dated 2011/2/23.
G752VSK, G75VW-3D, G51J, G1S
Homebuilt Windows Server