The free CPU-Z also has a CPU benchmark; otherwise 3DMark has some great ones available for free to troubleshoot both the CPU and GPU. Let's try to see if there are problems even outside VEGAS when the CPU and GPU are under load.
What version of VEGAS was your old computer running? Use that on the new computer, too?
I don't think Braw even uses the GPU so not sure why it's crashing (you're sure it's braw that's the problem)?
Can you revert the NVIDIA driver to the last version your manufacturer (Lenovo) issued? I had some crashing issues with my laptop (RTX 4060) until I went back to an older driver the OEM had put out. This tool can wipe away the current driver letting you install an older one: https://developer.nvidia.com/downloads/cleanup-tool
You could temporarily disable the GPU under preferences/ video.
Beyond that you might try official support for VEGAS.
What version of VEGAS was your old computer running? Use that on the new computer, too?
I don't think Braw even uses the GPU so not sure why it's crashing (you're sure it's braw that's the problem)?
Can you revert the NVIDIA driver to the last version your manufacturer (Lenovo) issued? I had some crashing issues with my laptop (RTX 4060) until I went back to an older driver the OEM had put out. This tool can wipe away the current driver letting you install an older one: https://developer.nvidia.com/downloads/cleanup-tool
You could temporarily disable the GPU under preferences/ video.
Beyond that you might try official support for VEGAS.
I was using the same version, both legit
I disabled the GPU as you said and it seems to have worked for the timeline editing/preview playback
After that if you could share a sample project with me I have similar systems (see my signature) and can try to replicate the crashes and see if we can get the underlying problem fixed.