If the ASUS Z87-K has such frequency drops while running one randomly selected application, there may be other such applications, so we were not surprised at the results in the default mode. This test is important since most users do not do any fine-tuning of their computer but just load optimal BIOS parameters and don’t change anything else. In our test we only tried to prevent the frequency drop on the ASUS mainboard by manually specifying the standard frequency multipliers for each CPU core in the BIOS.
Unfortunately, our intervention didn’t do any good. The ASUS Z87-K is still slower in the WinRAR test due to the CPU frequency drop but now it also shows the same behavior in Hitman: Absolution. The 4% difference means that we could install a CPU model with a 200MHz lower clock rate on the Gigabyte GA-Z87X-D3H and get the same performance as on the ASUS Z87-K with the faster and more expensive CPU model.