Thanks a lot for your info,I was thinking to upgrade my PC,equipped now with an 5800k,with that 6800k,but I realized that's would be a foolish thing to do,that would be only a very small improvement,I have to wait till the end of this year,or the beginning of the next one.Anyhow,I'm not interested in the integrated graphic card,when I decided to build my new PC,based on that 5800k,I had the illusion that combined with a R6670,it will have a decent Graphic performance.Now I have way over the average Graphic-Performance,after I have renounced at the integrated graphics,installing a msi R7870 HAWK,since then my RAM can operate way better at 1996,even if at not theirs full potential of 2133.In windows,my 5800k has a grade of 7.3 bottle-necking my Graphics that have 7.9 (previously the integrated APU Graphics and the R6670 combined,had onlt 6.3 in Windows).
From the wiki I linked about the 4100:
'Two Integers-Clusters (seen like logical cores from OS) in each Bulldozer "Core".'
The 4100 has two physical cores, the O/S sees two logical cores per physical.