It is an additional version of SciMarks Standard for Multiprocessor computers solely. You could run this version under a computer with one CPU, but it is not recommended. You could compare scores you get from Uniprocessor version with this one for a system in order to find the multithread application ability. There is a Professional version with additional VGA I/O and Disk tests at 20 levels, but only a fixed level CPU test at 5000M in this Standard Edition.