I installed a 1050ti on a Dell Optiplex 990 (i7-2600), and it run perfectly DOOM on High Settings, War Frame on Ultra, Elder Scroll Online in High Settings, Skyrim Heavily Moded get me a steady 70fps.
The 1060 is 47% better on the official benchmark. The 1050ti doesn'T require a Power Cord, it's plug and Play. All that on a 265 W Power Supply, which has been changed to a newer one with 400 W