Amazon.com: ASUS GTX 660 Ti Series Graphics Card Overclocked Edition Graphics Cards GTX660 TI-DC2O-2GD5 : Electronics
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
MSI GEFORCE GTX 660 Ti 2GB Power Edition Video Card Overclocked
EVGA SuperClocked 02G-P4-3662-KR 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