ASUS GeForce GTX 550 Ti (Fermi) 1GB GDDR5 PCI Express 2.0 x16 SLI Support Video Card ENGTX550 TI DC TOP/DI/1GD5 GPUs / Video Graphics Cards - Newegg.com
Amazon.com: ASUS NVIDIA GeForce GTX 550 Ti 1 GB DDR5 PCI-Express Video Card with VGA/DVI/HDMI, ENGTX550 TI DC/DI/1GD5 : Electronics