I also have a 290 (no chaos, quite happy) and would like to hear about this. FYI, Tom's Hardware GPU hierarchy list shows the two gpu's as close enough NOT to warrant upgrading, but I am not so sure. Opinions?

This kind of chaos. ( V13)

Used to be no problem rendering with GPU on. Now, besides the usual timeline lag ( have to work in preview half mode to get this amount of FX going in more or less real time, and still stuttering ), compositing is totally messed up in the renders with GPU on. Also GPU seems to do some weird stuff on the timeline from time to time, which then again suddenly seems to be gone.

I'm so fond of Vegas I don't want to switch, but tbh, Eduis 8 is such a preview monster that it seems to deal with anything you throw at it and not even flinch. The preview in Vegas is really extremely frustrating. If at least you could use a dedicated GPU for it...

My opinion: Fury X won't solve that. I think that you will always see this kind if preview problem in the low-res modes and also with GPU renders. My solution would be to try a best-full selective pre-render using XAVC-I for preview and render output using CPU only to get the highest quality. Try different formats (i.e. XAVC-I or MagicYUV avi as intermediate and then re-render to final; really it is almost a fast as just doing it once). May work; may not.

also this kind of chaos. I had posted these last year already, but it just seems a good illustration of what's going wrong here. The first pic is obviously what it's supposed to look like, taken from the timeline preview.

The other 3 are the GPU "versions"...thing was, you never knew what would come out, the messups were different in each render.

Kinvermark,

I already work in XAVC-I almost exclusively. The renderings with GPU on are the problem, the preview I could more or less live with. I just can't seem to accept that that's " just the way it is", when there's obviously a major issue here. Also, having to exit and restart Vegas and reload the project each time you change GPU on/off kinda sucks.

Agreed. There is enough evidence on this forum to suggest compositing with GPU can be unpredictable. I love Vegas too, but I think you may need to look at something else for this kind of work. Perhaps Hitfilm? Otherwise do you go to the Adobe After Effects rental scheme?

This kind of chaos. ( V13)

Used to be no problem rendering with GPU on. Now, besides the usual timeline lag ( have to work in preview half mode to get this amount of FX going in more or less real time, and still stuttering ), compositing is totally messed up in the renders with GPU on. Also GPU seems to do some weird stuff on the timeline from time to time, which then again suddenly seems to be gone.

I'm so fond of Vegas I don't want to switch, but tbh, Eduis 8 is such a preview monster that it seems to deal with anything you throw at it and not even flinch. The preview in Vegas is really extremely frustrating. If at least you could use a dedicated GPU for it...

There is a bug in Vegas for quite a while now and no, upgrading to a Fuey X doesn’t solve it. When you do a pan/crop and keep the video at the same as the project height, witch GPU on you will get what you see, flickering. But if you increase the height by the smallest possible amount, the flicker goes away. I believe there is thread I opened regarding this bug, those good with the search in this forum may find it.

"I believe there is thread I opened regarding this bug, those good with the search in this forum may find it."

I'm not going to brag about my search capability, but the bug was last described in this thread.