Multi-core Technology and SQL/EPDM

Has anyone ran benchmark test on processor speed to the amount of cores the processor has to SW and SQL EPDM? Why waste money on a multi-core processor with a slow CPU speed??? A firm can purchase 10 plus cores with over 3 GHz CPU and for what gain? EX: If frequency is low, ie, below 2.5GHz, some applications may favor fewer faster cores than more slower cores?  Does the operating system and/or SQL take advantage or utilize multi-core (more then duel core) HT technology? Bus speed at the CPU remains the same.

SolidworksSolidworks Pdm enterprise Pdm