is 2.6 GHz Intel Core i5-3230M is quadcore?

Solution
No it has 2 cores but it has 2 threads
Wrong. It has 2 cores, each of which shows up as two threads, so a total of four threads. A CPU without HT has only one thread per core.

It won't perform significantly better than a HT-less dual core.

diazalon

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May 12, 2013
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No it has 2 cores but it has 2 threads also so windows will se it as a quad core and it will perfrom close to a quad core but with less heat