Now let’s see what performance can be expected from our configurations with their CPU and memory overclocked. We reached the same overclocking results with all these mainboards: a CPU clock rate of 4.5 GHz (with the voltage fixed at 1.150 volts) and a memory clock rate of 2133 MHz (with timings of 9-11-11-31-2N according to the XMP profile). It must be noted that the Gigabyte GA-Z87-HD3 was rather unstable and the Gigabyte GA-Z87M-HD3 refused to function at all at such settings.
As expected and contrary to the default settings, the mainboards are comparable in performance when their CPU and memory are overclocked. The Gigabyte GA-Z87MX-D3H is the only exception as it fails in both gaming tests, probably due to some BIOS bug. The MSI Z87-G45 GAMING seems to be slower than the other mainboards except in games. However, this is just a visual impression. The actual difference is less than 1%, so everything is okay with the MSI product.