NVIDIA GeForce GTX 480 4-way SLI exemplifies law of diminishing returns | Engadget
The eVGA X58 Classified 4-way SLI motherboard
EVGA ushers in 4-way SLI with X58 Classified motherboard - Mainboard - News - HEXUS.net
Adamant Computers - Custom Computers and Gaming PC. Asus Prime X299-A II Series DDR4/ Quad CrossFireX & Quad SLI/ SATA3&USB3.1/ M.2&SATA Express/ A&GbE/ ATX