I think you should cut down on the speed reading and take a closer look at the info provided in the link you supplied, lol. It says 4GB of system memory is recommended for 64-bit operating systems not a 4GB version of the GTX 680 - "MINIMUM SYSTEM REQUIREMENTS Operating System • Microsoft Windows 7 32-bit and 64-bit Motherboard • SLI motherboard is required for all SLI configurations. NVIDIA recommends a PCI-E 2.0 x16 motherboard for the best performance. Please make sure you have updated your motherboard SBIOS to the latest version. • NVIDIA® GeForce® GTX 295 and GeForce GTX 590 cards do not require an SLI motherboard and work on all compatible motherboards. System Memory • 2GB is required (4GB is recommended for 64-bit operating systems"