This is not the same old Vegas problem. The problems the OP is having, even when GPU acceleration is off, are not problems I have heard of before.

I sounds like a background software is accessing the drive(s). I have this with Acronis TrueImage during background backup. Also some AV software can cause such intermittent issues.

I sounds like a background software is accessing the drive(s). I have this with Acronis TrueImage during background backup. Also some AV software can cause such intermittent issues.

Absolutely no, as I said, bug appear when I open Vegas. And never happen for anything else. That little "struttering" I have, it's system wise when Vegas it's open. When I close it, the problem disappear. Now I deactivated the 1050ti and using only the hd630 integrated with the cpu, and all work flawlessy.
 

Sounds like poor display driver support of OpenCL with the 1050ti, or possible a hardware level issue with the way the 1050 GPU is interfacing the motherboard. This is early adopter type of crap you run into. An updated driver, or BIOS upgrade, or BIOS changes might help. There could be a conflict with another high bandwidth device like a USB3, M2, or other video device. Disabling the GPU device stops the conflict. You might try disabling all accessories in Bios that are not needed to run the laptop, then re-enable one at a time until your problem appears. Then you can at least determine your problem child.

Can you disable the onboard GPU entirely?

Have you checked the DPC latency on the system with the 1050 enabled?

Use GPU-Z to verify the 1050 is interfacing at 16X and not 8X, this can be an indicator of bandwidth sharing.

Laptops are the best in Snake Oil sales. The 1050 mobile is like 1700GFLOPs where as your old 7970 was like ~2500-3500 GFLOPs.

Also modern GPUs do work with vegas, there are users on the forum that edit 4K with NV1080s with timeline acceleration. AMD is still your best choice for Vegas stability.

Sounds like poor display driver support of OpenCL with the 1050ti, or possible a hardware level issue with the way the 1050 GPU is interfacing the motherboard. This is early adopter type of crap you run into. An updated driver, or BIOS upgrade, or BIOS changes might help. There could be a conflict with another high bandwidth device like a USB3, M2, or other video device. Disabling the GPU device stops the conflict. You might try disabling all accessories in Bios that are not needed to run the laptop, then re-enable one at a time until your problem appears. Then you can at least determine your problem child.

Can you disable the onboard GPU entirely?

Have you checked the DPC latency on the system with the 1050 enabled?

Use GPU-Z to verify the 1050 is interfacing at 16X and not 8X, this can be an indicator of bandwidth sharing.

Laptops are the best in Snake Oil sales. The 1050 mobile is like 1700GFLOPs where as your old 7970 was like ~2500-3500 GFLOPs.

Also modern GPUs do work with vegas, there are users on the forum that edit 4K with NV1080s with timeline acceleration. AMD is still your best choice for Vegas stability.

I'll try do some tests tomorrow evening when I'll be back home.
Anyway I already upgraded the BIOS and with ANY version of nVidia drivers I have the same problem.
The bios it's very very very semplified, it's a locked one, so I can really do nothing there. For what I remember, DPC latency did show 900/1000us or something like that with the 1050ti active, but absolutely no spikes when the struttering pop up (with vegas open). Tomorrow I'll do further tests. Thanks a lot for help

P.S. I still don't understand why with ultra demandings games (Battlefield 1 for example) this never happen, but with Vegas yes... I really think it's a Vegas related problem.

Vegas is not a game. Games run largely from memory on the the GPU.

Vegas demands the GPU be shared between Windows display, and computation duties. All uncompressed RGB video needs to be sent back and forth to the GPU a couple times before hiting the display screen. Vegas is much more demanding on a system than some game. With Vegas, your GPU is sort of a math-coprocessor that is also painting the display 120-60x a sec. A game is just rendering pre-canned objects in an optimized way mostly directly from the GPU memory. Playing an MP4 file is more like game play to the GPU.

NLE applications ask a lot more from the system, especially when the resolution and colors climb. The various choke points on a laptop motherboard get revealed quickly generally under NLE demands.

Most games use the GPU for everything visual the game does, from figuring out animation inbetweens to applying post processes FX. The only reason a game would run better then Vegas is because the game sells more cards so the drivers are geared to make sure the games work while Vegas isn't considered. Drivers normally use hacks to make the games run better then they would (changing the exe name to other popular games can yield interest results/crashes).

If what astar says is true, running the game in a window should display the same bug you get with vegas.

Odds are it's a driver issue & one that might not be fixed yet. Let the card manufacture know what's going on.

While it's happening have the task manager open. It could be something is conflicting with Vegas & the task manager might show something else spiking in memory/CPU/drive usage when Vegas is running. That's normally where i start.

So, the PCI-E it's 16x, I'm always around 1000us with or without the 1050ti. Same if I deactivate the hd630. I'll try soon with 1050ti, vegas and task manager open.

Edit: Absolutely no spikes on DPC latency, no spikes on task manager on cpu, hd, ram, date usage... absolutely nothing.
Sometimes I have red spikes (2000us) on dpc latency but they're not linked with the struttering... So I absolutely don't know what to think. I'll turn off the 1050ti and continue work with the HD630 lol.

When you turn on the 1050Ti do you have an external monitor connected to it? What are the settings in your Nvidia control panel with regards to PhysX and 3D?

When you turn on the 1050Ti do you have an external monitor connected to it? What are the settings in your Nvidia control panel with regards to PhysX and 3D?

All on default...

Even, when I do 2 renderings at same time, my cpu it's only at 50% but ram goes up even to 99% and then windows send an alert about "insufficient memory" and Vegas crash...

I work on 1080p 25fps mts vids, and render them at 480p 25fps mp4... I know it's stupid to resize 1080p > 480p but the boss want at least a recording at 1080p, even if I then export in a way lower resolution (I need up these vids on facebook).
Also my render time for a 6/7 minutes vid, it's absolutely slow, sometimes it even take 40/50 minutes... :(

When you turn on the 1050Ti do you have an external monitor connected to it? What are the settings in your Nvidia control panel with regards to PhysX and 3D?

All on default...

Even, when I do 2 renderings at same time, my cpu it's only at 50% but ram goes up even to 99% and then windows send an alert about "insufficient memory" and Vegas crash...

I work on 1080p 25fps mts vids, and render them at 480p 25fps mp4... I know it's stupid to resize 1080p > 480p but the boss want at least a recording at 1080p, even if I then export in a way lower resolution (I need up these vids on facebook).
Also my render time for a 6/7 minutes vid, it's absolutely slow, sometimes it even take 40/50 minutes... :(

You didn't quite answer what I asked. Most laptop discrete GPUs only work with an external monitor. That would mean you have to connect an external monitor to get it to work properly. Setting PhysX in the control panel to the 1050Ti could help too but may only be available with an external monitor connected.

Did you disable "Smart Resample" in all events? That can cut render times quite a bit. In general, the 1050Ti is of very little help because only it's OpenCL capabilities will be used and those are rather limited on that GPU. Have you tried the Vegas2Handbrake method? I may speed things up and get you better quality.