*sigh* as I said, it's a SoC...it's not
exactly the same...the performance is closer to FX8XXX than it is to FX4300
This is an overclock screen showing comparable performance to an extremely OC'ed FX8XXX series:
http://www.hardocp.com/news/2012/10/04/amd_trinity_a105800k_apu_overclocked_to_73ghz
If you blow up the screens, he disabled all but 1 FPU, as per common practice with FX8XXX series to get maximum overclock... (7.3GHz stable OC is impressive, any way you slice it...)
http://www.overclockers.com/amd-trinity-a10-5800k-apu-review
If you look at this and actually READ it, you'll note that it has 4 x86 cores...and if you read it properly...you'll also note that the CPU has access to the GPU units to use for computing muscle...
My example was perhaps poorly illustrated, while the GPU is integrated onto the chip, you lose part of the piledriver processes that would be there...but the equivalent CPU power you can harness with an A10-5800K is dramatically more than a FX4XXX series.
You may not like the explanation given, as it was not technical, but it was to show that the SoC has more muscle than what the detractors were giving it credit for...explaining a SoC to mostly layman, I was trying to make an example they would better understand.
TL;DR A10-5800K > FX4300, A10-5800K +/- FX6300, A10-5800K < FX8320/8350
Makes more sense?