Used - Very Good: PNY GeForce GTX 660 Video Card VCGGTX660XPB - Newegg.com
Used - Very Good: EVGA GeForce GTX 600 SuperClocked GeForce GTX 660 Video Card 02G-P4-2662-KR - Newegg.com
Nvidia GeForce GTX 660 Ti 2GB Review | bit-tech.net
Used - Very Good: ASUS GeForce GTX 660 Video Card GTX660-DC2O-2GD5 - Newegg.com
Your store. ASUS GTX660 TI-DC2O-2GD5 GeForce GTX 660 Ti 2GB 192-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
NVIDIA GeForce GTX 660 Ti Specs | TechPowerUp GPU Database
ASUS GeForce GTX 660 2GB 192-Bit GDDR5 G-SYNC Support PCI Express 3.0 – Computizer
Asus Video Card Gtx 660 2gb 192bit Gddr5 Graphics Cards For Nvidia Geforce Gtx660 Used Vga Cards Stronger Than Gtx 750 Ti - Graphics Cards - AliExpress
ASUS GeForce GTX 660 3GB GDDR5 Graphics Card GTX660-3GD5-2DIS-DP used Tested | eBay