what do you mean? no PII and 1156 I5 to be found on this graph, also no Radeon only a 1080, and we don't know much about the testing scene used on both I guess.
also, the results you posted with a C2Q 3ghz, kind of look inline with the PII X4+RX480 on the hardware unboxed test?
Look at the scaling, unboxed showed a 4% loss going from an overclocked 6700k to a stock x4 955. Look at GameGPU with a 1080, you see a loss of almost 40% going down to an FX6100. The 955 should be right about the performance of the 6100, maybe a tad faster.
I'm also seeing twice the performance uplift from Vulkan on the q9300 compared to unboxed results and more than GameGPU as well. The reason is simple, their tests are basically running around an empty room. These are not indicative of actual game performance. Basically, if you look at the frame time graph I posted and look only at the spot where I'm essentially looking at a wall (It's a scripted event of throwing a switch in the game) you see the fps is at it's highest and OpenGL and Vulkan perform basically the same just like you see with unboxed reviews. If you want to see performance during real gaming though, look outside of that area in the graph and you'll see a much different story.
GameGPU's benchmark is basically the same thing as well, they run around an empty room but at least they shoot a barrel and have a nest that adds some load to the scene. This is not indicative of actual in game performance. It's similar to me to looking at max fps and determining a hierarchy. I have some more data too though, I'll see if I can parse through that today and get it posted.