P: Noise reduction effect not displayed in Develop mode

It's the same for me too: None of the 3 options made any difference to me.

None of the 3 options make any difference at all to me.  It still wont render noise reduction or sharpening on fit or fill.

Don't try and justify this change by saying we should be zooming in on every picture. We want the effect (approximation or not) that was enabled in the previous version, what possible reason do they have to remove it?
 

Isn't it better to follow the directions in this thread? Worked for me to resolve the blocked-up shadows issue in the Develop module/Camera Raw.

Hi all, since driver update did not help solve the issue, please follow the step 2 mentioned here https://helpx.adobe.com/lightroom/kb/crash-gpu-directx-enabled.html and let me know if this helps.

Hi all,  please follow the step 2 mentioned here https://helpx.adobe.com/lightroom/kb/crash-gpu-directx-enabled.html and let me know if this helps.

@4271024 Whilst this is true, as in it's advisable to better see the effect of noise reduction and sharpening at 100%, previously, you were still able to see the effect at fit or fill when NR was applied. Now, if you drag the noise reduction slider to the far right, you see absolutely no change at fit or fill. This is an incorrect behaviour of LR

With new lightroom Classic CC there seems to be a problem with GPU acceleration whilst on Images are showing significant grain, almost like no noise reduction has been applied

The two images below the only difference between them is GPU acceleration on vs off. Obviously, it's a bad photo but it demonstrates the problem quite clearly 

Sorry had to upload to dropbox couldn't post a Jpg apparently 

https://www.dropbox.com/s/n4cipdmcroal1d9/Screenshot2017-10-2218.01.09.png?dl=0 https://www.dropbox.com/s/qn4whgz8c7g59xy/Screenshot2017-10-2218.01.28.png?dl=0 

I've updated Adobe CC and my Nvidia Drivers 
My GPU is a "Geforce GTX 980Ti" 

Any help is really appreciated 
-Declan 

FWIW ive since tried 3 different drivers ranging from this months latest release to ones for March.  The issue is present on all on them in LR classic.  The issue is NOT present on old Lightroom CC/6 using any of those drivers.
So im going for a bug in LR Classic itself as opposed to a driver issue as all of them worked perfectly on older versions of lightroom.
"Old" video card is rubbish as well, people are getting this with 1050/60/70/Titan range modern high end cards - there are no newer ones!

What OS are people experiencing this on?  Im using windows 10 (autumn creators update) and it does it.  It is doing it for apple users or win7 users as well?

I think it's probably a driver-lightroom issue... But the thing is: everything was working just fine before the update. I hope Adobe and nVidia to work together to fix this ASAP.