Hmm, you have 2GB available VRAM but you’re running the GPU at 100%. I reiterate my earlier post: the only time I experienced this in the past and occasionally now is when my system is set up to work on the edge of its capabilities, often when I have overclocked it a bit too much.
Just a suggestion: install MSI Afterburner if you don’t already have and run the GPU and/or its VRAM at a lower clock rate. Just go down a lot and see if it still happens. If not, bring the rates back up slowly until the white bar appears again and then back down a bit. Experiment. It might not work, but it’s worth a try, I think… 