"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.

If you take a look on YouTube VEGAS Pro tutorials on fixing/minimize vegas crash problem (Coming from influencers & random youtube channel), they will suggest to turn off the GPU acceleration. And it works & reduce the amount of crashes with VEGAS. And I'm pretty sure most of vegas user experience this problem regardless genuine or cracked version of VEGAS.

I don't see such problem on Adobe Premiere even its a crack version of it.

try running your system / vp on gpu1060. disable igpu in bios. works for me

As pierre-k suggested, I changed number of rendering threads to 1, and that solved the problem of crashes (thread lock-ups) during playback when GPU acceleration is on. However, it is still better for me if I turn off GPU acceleration and use 4 rendering threads. Even 1 rendering thread with GPU off is better than 1 thread with GPU on. I've been able to keep from crashing with up to 3 rendering threads and GPU on, but usually after closing Vegas, Vegas is still using at 25 percent of CPU, and I need to kill Vegas with Task Manager. During playback, Vegas eventually crashes with 4 or more rendering threads and GPU on.

GPU acceleration of video processing is NOT GPU Acceleration of rendering, nor is it RAM prerender.

Several people are conflating these three actions as if they are one, without establishing a connection that others can verify. If I were a new user, I would call that "confusing."

Several people are conflating these three actions as if they are one, without establishing a connection that others can verify. If I were a new user, I would call that "confusing."

The new user doesn't care why he needs to set DRAM to 0 to render his video. When to enable GPU and when not. And lots of other advice.

He wants a program that behaves logically.

If I was a brand new user and had such problems from the beginning (DRAM, number of threads, GPU On / off, changes to internal settings and more), I would delete Vegas and learn in another program.

I love Vegas for 15 years, so I suffer quietly but I believe.
One day the Team will correct all the mistakes and I will be able to die happily.

😇

In the areas magix has rebuilt components, Vegas shines, but there's a lot of old, buggy code in there still they need to rebuild, especially in regards to memory/thread management. Vegas can play back my 4k VLOG 10 bit files from my S1's and my EVA1, in fact it's the only app on my PC that can play anything more than one frozen frame of video from those files (it plays them full speed), but once I start editing with those files, if I don't make proxies, it crashes every few minutes.

I too have faith, though, as I've seen plenty of great progress made. Vegas is still stable enough for me to run my entire production company off of it, as I have been for years, and now that I have Vegas Effects and Vegas Image, once I finish testing them out I may be able to uninstall almost every Adobe app from my system.

The new user doesn't care why he needs to set DRAM to 0 to render his video. When to enable GPU and when not.

A new user has only to do with the automatic installed default options for those things, and those default settings are for DRAMP 200 and the program looks itself for the best GPU to use for previewing OFX options.
When someone encounters there (as he thinks) problems before switching to other settings he has to learn what those options really do. Most users than go to YT, in my opinion not the best place to get real solutions. Go to the program "How to's", Help files, manual or Vegas own video-instructions for the best solution. And when this all does not help ask the developers. This is what I have learned as a longtime moderator of the ( next year former) Dutch Vegas Videoforum.

s. Go to the program "How to's", Help files, manual or Vegas own video-instructions for the best solution. And when this all does not help ask the developers. This is what I have learned as a longtime moderator of the ( next year former) Dutch Vegas Videoforum.

I understand you. But Vegas is not logical.

Examples of illogical behavior:
I have an Intel Xeon 3.40Ghz. 4 cores. number of threads 8.
Rendering in Vegas is stable with only one thread.

DRAM should be for dynamic preview (shift + B)
Why does it affect rendering speed?
Why 0 MB allows smoother playback but causes tearing between cuts?
Why is the difference between 0 and 200Mb so crucial for program stability?

Today computers have 16 GB or more and Vegas has 200MB problem ???

Sorry, there are no such answers in the manual.
And they have not been explained by developers in 15 years.

It seems to be specific to certain hardware configs. I currently have my dynamic RAM set to 40,000MB, which oddly is still only enough to preview a small portion of maybe 30GB of video on the timeline, but I digress... it mostly works as it should, or at least as stable as it did with it set to 0 or 200.

AMD Ryzen 7/Radeon7 System 64GB with 16GB VRAM

However, my secondary system with a GTX 970 and an i5 CPU did have issues with low memory errors, render crashes unless dynamic RAM was at 0, etc.

That said, we're drifting way off topic here, let's get back around to GPU Processing being useful, which as far as I can tell on my system, it is and works as it should.