bignastyid :
There is no i3 6230 bit i'm guessing you meant the 6320. The 6320 is a bit faster than the the older i5 2300 even in multi-threaded apps. The I3 has faster cores which makes up for the a hyperthread core being a little slower than a physical a core.
How can a dual core processor beat up quad processor?
i5 2300: 2.8GHZ x 4 = 11.2 GHZ
i3 6320: 3.9GHZ x 2 = 7.8GHZ
also i5 2300 have more cache memory.