Record smooth PC gameplay

[rmgdnz]

I'm trying to find a no-compromise solution to record extremely smooth gameplay footage. I want to achieve the following:

1) Up to 4K60 recordings (usually 1440p)

2) Leaving Gsync enabled on my main monitor

3) Consistent frametimes in the recording

4) Minimal to no performance impact on my gaming PC

5) 1440p 240Hz on my monitor (I'm aware capture card passthrough is limited to 144Hz so I wouldn't use that).

 

I tried the following but encountered issues: 

1) GeForce Experience Shadowplay: inconsistent recording frametimes when Gsync is enabled. When I cap my FPS at 60 or disable Gsync, I get smooth recordings.  

2) OBS: inconsistent recording frametimes when Gsync is enabled, large performance hit

3) OBS+NDI: recordings seem smoother, but there's still more of a performance hit than Shadowplay.

 

I've heard mixed results about using a capture card and duplicating displays, can anyone confirm if this actually works well? Do most YouTubers/streamers just not use Gsync? Cause I really can't stand tearing. Thanks!

[LogicalDrm]

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