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I was recommended either -K (for more options) or standard Haswell 84w processors instead of the 65w -S low-wattage processors.

For e.g., comparing i5-4590 vs i5-4590S. You lower the frequency and base clock rate? Or is that one and the same?

Secondly, is there anything that the -S processors do, that the other standard clock/wattage processors cannot?

I read that you lower the cpu base frequency and you can notice the differences here (for e.g.):

http://www.chiploco.com/intel-haswell-24878/2/

http://www.bit-tech.net/blog/2013/10/06/are-low-power-desktop-cpus-worth-buying/

I want noise at a min. and so same with heat. I want to build an itx and after pricing the components, I'll have to use my current gpu which is a gtx 750. It's sufficient for htpc and even light gaming.

So, is there any reason to go with a low watt cpu or just use the standard 84w equivalent. If I go with the latter, what are the options - and what are the limitations The one article mentions something about mobo/brand BIOS settings/options? I suppose Asus, Gigabyte, ASrock etc. will provide settings to undervolt or change the frequency on these Haswell processors?

Thanks for any explanations/advice.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 Asus P5Q EVGA Geforce GTX 750 Kingston HyperX 4 x 2GB DDR2 800MHz 
OSPowerMouse Pad
Windows 7/Linux Corsair HX520W Antec 300 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 Asus P5Q EVGA Geforce GTX 750 Kingston HyperX 4 x 2GB DDR2 800MHz 
OSPowerMouse Pad
Windows 7/Linux Corsair HX520W Antec 300 
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Reply