Diablo3dfx

Everywhere I've ever worked, and when I was taught this in school, they say to use T-568B, as well as every premade ethernet cable I've purchased being B. Why are you using A?

2 or 3 magnetic RGB strips would be nice to light up the big window on my Corsair Air 540
 
http://pcpartpicker.com/p/cPqRZL

 
I'm replacing the white USB with a black one as soon as it shows up from Newegg market