Hi Morel,
Please bear in mind that the RAID controller on your system is a software/hardware RAID solution, which means that the data stripping is calculated by the processor and using the system resources, in addition the performance may be affected by the rest of the software running on the background, the performance test application being used, the type of memory and processor installed and also the settings of the performance tester which may have a big impact on the results.
I regret to inform you that Intel does not evaluate the performance of the specific RAID configurations used.
For more information about Intel components and performance try the link below:
https://www-ssl.intel.com/content/www/us/en/library/benchmarks.html
Allan.