Well I could give you a "perspective" from another laptop, which is 1200 because it's a "student" laptop (ultra thin and 360 yoga).
http://shop.lenovo.com/ca/en/laptops/lenovo/yoga-laptop-series/yoga-2-pro/
With IE5 and 4GB of RAM
I played:
Monster on tiny with 40 FPS going down to 17-20 FPS...