Some video effects benefit greatly from GPU acceleration or can only be used with it. I have always turned it on. As discussed many times, values ​​greater than 0 of Dynamic RAM Preview can cause problems. If there are problems with GPU acceleration enabled, I would first set Dyn RAM Preview to 0 and see if that helps. In addition, the reserved memory for the RAM preview as a working memory may be missing. In the setting from the screenshot, only 5GB remain as working memory. If Selectively Prerender Video (Shift + M) is used for the preview, RAM Preview can be set to the default value of 200, and thus almost the complete memory for Vegas and Windows is available.

I'm using VEGAS Pro 17 build num 321.

I've been turning of my GPU accelaration since VEGAS Pro 16.

If i do turn it on, the video in my preview will starts to show black flicker and eventually turns into black screen & crash.

I've seen the black flicker and only with vp17, did your fps become very low or unrelated?

I can't turn it on for anything, as renders will abort after a few seconds.

VP14 with Qsv.

I tried using it in Vegas 17 (NVidia 2070 Super) and my first render had major artifact problems. Been off ever since.

@Musicvid and @marc-s I dont have the impression OP is talking about rendering

If i do turn it on, the video in my preview will starts to show black flicker and eventually turns into black screen & crash.

I seemed to have more crashing with it on as well so I just turned it off in case that was causing it.

I never saw that crashing or other problems. I think it depends on other Vegas- and Windows settings as pagefile amount, place a.s.o.

I have no issues with it. Check your GPU drivers. Make sure to use Studio drivers.

Ok, I'll play with it in a future project and see if it helps preview mode. Rendering is definitely a no go. Yes on using the studio drivers and also using internal SSD drives for everything with pagefile and video on drives separate from the system drive.

Some users are reporting success using revo to uninstall all nvidia everything, reinstalling the studio drivers, and then resetting Vegas as well.

In my case Dynamic Ram is an issue (regardless of rendering method/program Vegas /ffmpeg, MagiYuv):

Left side with Dynamic Ram 256 MB, right side with Zero Dynamic Ram

Condensation trail of an aircraft with hiccups... maybe version with Dynamic Ram on is more artwork 😄; artefacts are not predictable but randomly

@Musicvid and @marc-s I dont have the impression OP is talking about rendering.

Neither do I. I am describing correctly what happens when I turn on GPU acceleration of video processing. More acceptable now?

In edit mode I switch Dynamic RAM to 256MB, no problem with 4k Video in Preview Window (RTX 2080), only for rendering I opt for Dynamic Ram 0.

For rendering:

If you set DRAM to 0, rendering will be extremely slow.
The solution is to leave the DRAM at any number (eg 2000) and change only the number rendering threads to 1.

Method:
1. Permanently set number rendering threads to 1
2: DRAM for example 2000
3. After completing the project, restart Vegas and then render.

It works for me, without artifacts and errors in the video.
Do not use Magix AVC - it is of poor quality. Much better is the Sony AVC.

For Preview:

Dram to 0 causes tearing playback where there are cuts. Playback always jerks for a while.

VP17 result:

I tested the RTX 2070.
I tried studio and game drivers.
The result is the same as yours.
Black flashing windows. Playback delays. Colorful artifacts.
Freezing Vegas. Fall.

I put my old GTX 970 back and the result is great !

No falling. No issues.
The GTX 970 is not as powerful as the RTX 2070 but is stable!

For 4k I learned to use Proxy and I have peace of mind.

Solution for your card:

Turn off GPU support

and wait for the next update.

I think it would be good you read the Help files what that setting really does and what you have to do to use it.

If you don't use that Option in Tools none of your total available RAM will be used and if a small amount is set in Preferences/Video only that part is reserved, not used.

For rendering:

If you set DRAM to 0, rendering will be extremely slow.
The solution is to leave the DRAM at any number (eg 2000) and change only the number rendering threads to 1.

Method:
1. Permanently set number rendering threads to 1
2: DRAM for example 2000
3. After completing the project, restart Vegas and then render.

It works for me, without artifacts and errors in the video.
Do not use Magix AVC - it is of poor quality. Much better is the Sony AVC.

 

For Preview:

Dram to 0 causes tearing playback where there are cuts. Playback always jerks for a while.

 

VP17 result:

I tested the RTX 2070.
I tried studio and game drivers.
The result is the same as yours.
Black flashing windows. Playback delays. Colorful artifacts.
Freezing Vegas. Fall.

I put my old GTX 970 back and the result is great !

No falling. No issues.
The GTX 970 is not as powerful as the RTX 2070 but is stable!

For 4k I learned to use Proxy and I have peace of mind.

 

Solution for your card:

Turn off GPU support

and wait for the next update.

I often use Magix AVC template to rendering my video. Will try out Sony AVC template.

But its a bit sad most of us cant fully utilized VEGAS GPU acceleration for instant playback.

I've seen Premiere Pro able to use its GPU acceleration and it works like a charm, regardless what PC/Laptop & GPU you're using.

I've seen Premiere Pro able to use its GPU acceleration and it works like a charm, regardless what PC/Laptop & GPU you're using.

There is another way for you but it is experimental:

1. Open internal preferences. (click mouse with Shift key)



2. In the "Internal" tab, type "Enable open" in the search and rewrite Enable Open Cl / GL Interop to "FALSE". Click Apply.

3. In the search box, type "Black" and rewrite "Enable Blacklist ..." to FALSE. Click Apply.

4. On the I / O and Video tab, enable GPU acceleration.

5. Restart Vegas.

6. Change Preview to Preview Half or Good Half. NOT FULL! (This is very important for smooth playback)

Now it will happen the same miracle you experienced in Adobe Premiere.

:-)

This method is emergency and with the next official update you have to undo the changes!

If you don't use that Option in Tools none of your total available RAM will be used and if a small amount is set in Preferences/Video only that part is reserved, not used.

@j-v I notice that all the reserved RAM is used, regardless of whether the RAM preview is used with Shift + B or not. Even with the "normal" playback of the timeline, the reserved memory is used gradually. This can be checked in the task manager. That's probably the case with rendering as well.

Sorry @matthias-krutz, but I see other things.
After loading a project, Dyn Ram Preview set to 2000 I see this

During using the reserved Ram by Ctrl_B of a timeline selection I see this

and after clearing that cached amount following the help files( changed preview) I see this

I didn't get the impression OP is talking about dynamic ram preview

I didn't even know that GPU timeline pprocessing and Dynamic RAM utilization were related. Sounds interesting though. Could someone please elaborate and perhaps get me up to speed?

I didn't get the impression OP is talking about dynamic ram preview

You are right, it has turned into another direction, sorry for that, but I got the impression some members here are not knowing what Dynamick Ram Preview really does and does not. I'm out. 😌

"But its a bit sad most of us cant fully utilized VEGAS GPU acceleration for instant playback."

Except most of us can... Your case is not common, and is likely due to a driver issue.