Unexpected difference between 2cpus @ same system

[Hardtoid]

Hi to all! I own a e5300 dual core & a e4500 core2duo cpu. I benchmarked one after another placing them at the same PC. Perfomance test showed that the e5300 cpu, gives 50% less mark than the results of e4500. Actually, checking what e5300 marks should be like, my benchmark is 60% lower. I think that soimething is wrong here but I can't find out what.
Thank you.

[David (PassMark)]

You need to check out the indivdual scores to see which score was low, pulling down the overall result. e.g. was the it disks core, the memory benchmark, 3D, etc..