ASUS GeForce GTX 660 2GB 192-Bit GDDR5 G-SYNC Support PCI Express 3.0 – Computizer
Used - Like New: PNY GeForce GTX 660 Video Card VCGGTX660XPB - Newegg.com
Amazon.com: WWWFZS Graphics Card Graphics Card Fit for ASUS Video Card GTX 660 2GB 192Bit GDDR5 Graphics Cards for NVIDIA Geforce GTX660 VGA Cards Stronger Than GTX 750 Ti : Electronics
PNY VCGGTX660TXPB G-SYNC Support GeForce GTX 660 Ti 2GB 192-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card