MSI GeForce GTX 660 Ti Power Edition 2 GB Review | TechPowerUp
GeForce GTX 660 Ti 2 and 3-way SLI
ASUS GTX660 TI-DC2O-2GD5 G-SYNC Support GeForce GTX 660 Ti 2GB 192-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card GPUs / Video Graphics Cards - Newegg.com
Review: EVGA GeForce GTX 660 Ti Superclocked & 2-Way SLI