Newegg via eBay offers the Gigabyte GeForce GTX 1080 Ti 11GB 352-bit GDDR5X PCI Express 3.0 Video Card for an in-cart price of $634.99 with free shipping. That's the lowest price we could find by $65. It features a variable core clock of up to 1.5GHz, 11GHz memory clock, support for DirectX 12 and OpenGL 4.5, and DisplayPort, DVI, and HDMI inputs.