Canon 7D noise at ISO 100

In the Raw Files I could not see any Noise..

Only when I did push the image a bit.. here in the first image.. used ACR 7 and did most of the

adjustments in ACR 7 .. And then the vertical strip start showing in the clouds.. So I ran it through

Define2 to only remove vertical banding.. And added some unsharpen mask..

The second Image was pushed even  more.. with using Nik color contrast and detail extractor.

then it started to get really noisy but only in the clouds. Rand some amount of noise reduction again and with some unsharpen mask.

Also if these were printed at my kodak shop here. The noise would not even show up in the photo's.