Disk Drive Controller
The system drive controller is an important part of system performance. In most modern boards your drive controller will run off of the PCI-e bus. The PCI-e bus performance can be affected by poor trace layout as well as many other design choices that show up on different boards.
For testing we use Sisoft's Sandra and Everest.
The H55M-ED55 shows us slower HDD performance by roughly 10MB/s. This could hurt it and also is more than likely the reason for the slower HyperPi performance.
The slower HDD performance is again present in our Everest testing. Hopefully MSI can fix this minor slowdown with a BIOS update and get the HDD read performance back to where it should be.