Post a pic of your Dolphins settings, I am running maxed settings without any issues on an i7 4790K and a GTX 1070 so you should definitely have no issues on your end as well.
Windows 10 x64 | Intel Core i7 4790K @ 4.4ghz | NVIDIA GeForce GTX 1070| 16GB DDR3-2400 | Bose Companion 5 | Sennheiser Momentum 2.0| Logitech G502 Proteus Spectrum
MacBook Pro Retina 15in 2014 | OS X El Capitan 10.11 | Core i7 4770HQ| Intel Iris Pro HD Graphics | 16GB-DDR3-1600
