With any system you will want to see a combination of synthetic and real-world testing. Synthetics give you a static, easily repeatable testing method that can be compared across multiple platforms. For our synthetic tests we use Everest Ultimate, Sisoft Sandra, FutureMark's 3DMark Vantage and PCMark Vantage, Cinebench as well as HyperPi. Each of these covers a different aspect of performance or a different angle of a certain type of performance.
Memory is a big part of current system performance. In most systems, slow or flakey memory performance will impact almost every type of application you run. To test memory we use a combination of Sisoft Sandra, Everest and HyperPi 0.99.
The H55N-USB3 seems to lag behind the larger and faster P55 boards. Although we are not overly surprised we are a little disappointed.
Everest Ultimate is a suite of tests and utilities that can be used for system diagnostics and testing. For our purposes here we use their memory bandwidth test and see what the theoretical performance is.
The numbers here are odd; for some reason Everest wanted to run as a single threaded app and pushed the CPU up to its single core max of 3.4GHz. We think we may see the beginnings of an issue here. Perhaps the lack of sufficient power phases is not the only problem.
HyperPi is a front end for SuperPi that allows for multiple concurrent instances of SuperPi to be run on each core recognized by the system. It is very dependent on CPU to memory to HDD speed. The faster these components, the faster it is able to figure out the number Pi to the selected length.
For our testing we use the 32M run. This means that each of the four physical and four logical cores for the i7 and the four physical cores of the i5 are trying to calculate the number Pi out to 32 million decimal places. Each "run" is a comparative to ensure accuracy and any stability or performance issues in the loop mentioned above will cause errors in calculation.
The H55N with the 875K is about in the middle of the 1156 Core i7s. The thing that drags them down is the extra instance per core. Still, the board looks solid in this test.