There's no doubt that GPU benefits are minimal and perhaps detrimental depending on your configuration. If you are finding it doesn't work for you and you have updated your drivers you best bet is to turn it off.
Good luck with that.
I7-4790k with a 750 Ti and my performance with the GPU feature on is horrible slow. Zooming and moving around images results in the images blurring and taking an age to render clearly. Its also strange that with GPU enabled my CPU usage is about 20% higher when moving the sliders. It would be nice if Adobe would at least acknowledge the issue.
I'm happy with my CC abo and LR6 so far. The GPU support improves the responsiveness and is awesome. But I also noticed that cloning/healing brushes are MUCH SLOWER
Thanks and regards,
Same on my system. After turning GPU on,the spot/healing brush performance decreases noticeable.
AMD 1055 CPU, AMD Radeon HD 5770; 8GB RAM, Win 8.1 64bit.
No problems in Photoshop.
i noticed that even with my 980GTX the image preview needs a second for updating.
first i see a noisy image and then the preview is updated and the noise is gone.
with LR 5.7 i never noticed this.
the really annoying thing is.... it happens for images where the preview is already rendered.
i never had issues with the slider perfromance in past versions.
but the library modul was not the fastest (so to speak)... try photo mechanics and you will notice the difference.
overall... even with having a 980GTX i am not impressed by what is called "the major feature" of this release.
I have noticed that my mentioned problems occurs only then using my Wacom pen (current Intious Pen&Touch) with current drivers. If I use my mouse the performance is good.
i've the same problem, latest nvidia driver @ gtx660ti