I've recently ordered an Alienware M18XR2 with the following specs: Intel Core-i7 3940XM Dual NVIDIA GTX 680m SLI Intel 520 120GB SSD (externally purchased) 2X2TB WD Green in RAID-0 (externally purchased) the rest of specs aren't important for my question. As for memory, I decided to go with 32GB Corsair Vengeance. Now I have two options: Corsair 32GB DDR3 1600MHz Vengeance Laptop Memory PC3-12800 10-10-10-27 Corsair 32GB DDR3 1866MHz Vengeance Laptop Memory PC3-14900 10-11-10-30 The 1866Mhz obviously has faster clocks but the 1600Mhz has tighter timings. I am going to overclock the system to the ragged edge (always had!) and the extreme edition processor won't be bottlenecked by the memory. In these circumstances, money no objection, which one of the two would you recommend and why?