[kalininalex]

Hyper-threading doesn't mean you magically get extra 4 cores. It's a technology that works well for _some_ workloads, and for those it achieves up to 30% performance boost, per Intel claim (http://en.wikipedia.org/wiki/Hyper-threading). So, at best you could treat it as approximately 5-core. This may not change the original argument, but mac mini is not an 8-core computer. A true dual 4-core CPU server will have significantly more CPU capacity.

[hosay123]

Hyperthreading works by duplicating just enough circuitry to allow use of CPU resources for a thread while another is stalled on a load, nothing more. No "5 cores" about it, it's simply a hardware assisted scheduling trick.