Ohh you meant that NR, I thought NR from 3rd party or from Adobe, I never touch that NR in DPP before, so I wasnt aware about it, and yes the HIGH ISO NR is disabled in my camera. I usually use DPP only for converting and adjusting the wb, colors, contrast etc ( RAW Tab only) then cropping and resizing in CS3. So I have to set both sliders to 0 to make NR disabled? Is that what ur saying?
Yes, "disabled" really just means "really low". If you ever want to see what those 4 settings do at any given ISO, just take a series of shots and go to the tab to see. Each model has different values at each ISO level for each of the 4 settings. I try to keep those sliders below 12 regardless of ISO.
DPP does a good job at noise reduction more around the mid range, but anything higher really starts to smear detail. It is better to always have DPP do low level NR, then finish it up with 3rd party tools to retain your detail.