Operating System > Microsoft Windows 7 32-bit and 64-bit > Microsoft Windows 8 32-bit and 64-bit  Motherboard > An 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.  > Dual-GPU graphics cards such as GeForce GTX TITAN Z 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).