“dynamic ram max MB to 1000, with a maximum of 7128 available ” – Reduce this back to the default setting of 200. If you are using RAM preview during editing, then enable the 1024 (8-bit memory format) only during editing. Windows uses extra ram for caching operations, and dynamic preview frames are not used during render. You can slow your machine down by disabling D-Ram preview altogether setting it to 0, so use the default. Vegas uses some aspect of the default settings for frame buffering or something.
16GB is a good recommendation. The rule of thumb is 4-8GB per CPU core, and the more the better.
Your media does look suspect with the odd frame rate. You might try changing your project settings to 29.97 FPS. You can also try not rendeing in BEST FULL, and change your render profile to render in GOOD. If you are capturing game footage, use XSplit over OBS, as xsplit records constant frame rate video. If not, the suggestion of running it through handbrake is a good one.
Here is a way to get media info on your media details:
https://www.vegascreativesoftware.info/us/proxy/3aa8d068d6ee911c0a37/?link=https%253A%252F%252Fwww.vegascreativesoftware.info%252Fus%252Fforum%252Ffaq-how-to-post-mediainfo-and-file-properties–104561%252F
Your GPU is not a terrible one, but AMD would be better suited for Vegas. You might try turning off all the CUDA settings in preferences, and render formats. Then enable the GPU under preferences Video Tab, then choose encode mode: AUTO in the render profile. Try a Sony AVC profile with bit rate set at 25Mbs, and audio at AAC 384, and enable progressive download.
An alternative would be to get a Blackmagic intensity shuttle, then record your game footage on that device. You basically use another HDMI cable from your PC and clone your display. Recording the 2nd display. Then take that footage and edit it on the timeline. This will look better and be recorded in a video standard format.
Knowing more about your actual system specs would be helpful too. Download a copy of “SPECCY,” then Save As .TEXT file, and post the resulting Summary section at the top to the forum.