During processor and memory overclocking, different mainboards accomplished different results, which we summed up in the following table for your convenience:
Gigabyte GA-Z77X-UP7 performance during overclocking is an appropriate match for the obtained results in this mode, however, I would like to draw your attention to the last gaming tests and compare the obtained results against those of ASRock Z77 Extreme9, Asus P8Z77-V Premium and Gigabyte G1.Sniper 3. All these mainboards have one thing in common: the additional PLX PEX 8747 hub. As you can see, they all demonstrate very similar results, which do not depend on overclocking and are a little lower than originally anticipated. In all these cases, it is the hub latencies that cause this. These mainboards are designed as solutions for multi-card graphics configurations, when faster slot speed makes up for these minor latencies. However, when there is only one graphics card installed into a system, the negative effect from the latencies is obvious. However, if we look at the performance of Gigabyte GA-Z77X-UP7 in these games, we will see that it is very similar to that of the regular mainboards and is significantly higher than that of the other three products with the same hub onboard. All this was possible due to a special connector tied directly to the processor, which uses processor PCI Express lanes avoiding the additional hub. This allows maintaining high slot speed when there is only one graphics card in the system.