Photoshop Quick mask virtually non-functional

[nemophoto]

I'm running Photoshop CC (x64) under Windows 8.1. I use a home built computer with an AMD FX9350 chip, 32Gb RAM and an nVidia GTX 660 graphics card.

I find that Photoshop can no longer render the Quick Mask on an image. I wait forever. It renders blocks of red, but never completes the redraw. If I look at the image to fit view, it renders it quickly. However, if I zoom in to do localized work and clean up mask edges, it just never renders the whole mask. (see images)

Anyone else have this issue?

Nemo

[Les Sparks]

Just tried it on my Win 8.1 Intel based computer and I get the same behavior. Quick mask renders immediately when view is 50% or smaller and fails to render at 66.6% or greater.
Computer specs Intel Cor i7-3770 16GM RAM Win 8.1 Pro with media center 64 bit
Nvidia GeForce GT 620

[nemophoto]

Thanks for checking that out Les. Hmm. Some sort of nVidia bug related to Win 8.1? Glad I'm not the only one experiencing that issue. Out of curiosity, do 16-bit TIFFs, or 8-bit LZW TIFFs or layered TIFFs render properly for you in Windows file Explorer? Anything but 8-bit uncompressed TIFFs show up as either weird posterized thumbnails or just a TIF icon on my system as well.

[sniper]

Just tried this on the home pc (I'm away from the studio and most of my computers) and no problems with CS5, and thats on a fairly low spec pc on 32 bit.

[nemophoto]

I didn't have this issue with Win 7 nor with CS6, and definitely not CS5. Nor did I have the thumbnail issues with Win 7.

[Les Sparks]

Don't have the issue with CS6.
Windows explorer shows all tiff files correctly if I select any of icon size view options. If I select list or details as the view option, I get the tiff icon (as expected).
Seems that the problem, at least for me, is related to  Photoshop CC because I don't have the problem with Windows 8.1 and CS6.
Les