I've checked other threads related to this issue and I see that people with higher and powerful CPUs (multicore) encountered this situation as well. According to some reports, this is influenced by the SiSoftware Sandra Lite not being correct.
Also go to Control Panel > Power management and turn on High Performance mode. After this procedure, reboot the PC and then try again the test.
Alternatively, use another tool to compute the CPU's processing power: http://www.passmark.com/products/pt.htm