Im not sure the difference between these besides the qtys.
Corsair Vengeance LPX 64GB (2x32GB) DDR4 3600(PC4-28800) C181.35V Desktop Memory - Black
or
CORSAIR Vengeance LPX 128GB (4 x 32GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Intel XMP 2.0 Desktop Memory Model CMK128GX4M4E3200C16
and which works with the ROG Zenith Extreme Alpha trx 40
thanks