We tested all Z77 motherboards in combination with an Intel Core i7 3770K processor, 4 GB (2x 2GB) Corsair Dominator DDR3-1600 CL8 memory, an OCZ Vertex 4 128GB SSD, a Cooler Master Real Power M850 power supply and Windows 7 x64.
The charts below have the results from our benchmarks. The scores are pretty close together. The variance is no more than a few percent, and that's mainly due to the differences in bClk and the inaccuracy of benchmarks. The Gigabyte BA-Z77X-UP5 TH is in line with how the other boards scored. Performance is therefore not what you should look at when you are deciding which motherboard to buy.