This is the 3GB VRAM version of GTX 1060. About the same price as the GTX 970 and performs much better but with less vram. Would this be worth it over the 6gb bigger brother? who knows...
MSI GeForce GTX 1060 3GT OC 3GB GDDR5 overview
The GeForce GTX 1060 is loaded with innovative new gaming technologies, making it the perfect choice for the latest high-definition games. Powered by NVIDIA Pascal - the most advanced GPU architecture ever created - the GeForce GTX 1060 delivers brilliant performance that opens the door to virtual reality and beyond.
The GTX1060 3GB actually has a cut down core over the GTX1060 6GB with 10% less shaders.