Well I had windows 7 ultimate but somehow it didn't let my system using 4 cores and only showed 2 cores..I thought my processor was BROKEN..
So my clean of Windows 7 ultimate was fail? I found out ultimate was not supporting 4 cores at all and I should make some tricks to work all cores..
Well I have now Windows 8.1 PRO with all 4 cores working now and performance boost is dramatical..Well of course it would be if I had only 2 cores strugglin with CS:GO

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Well I played public later with 200fps stable in de_nuke...And in CS:GO the fps must be much higher than 100...Didn't play MM yet..Game is just awesome now with good FPS...
This system well enough for Adobe photoshop and inDesign and now CS:GO..But I need little more memory..But I seeked memory this system 8GB; 2x4GB => 200 EUROS...TROLO...