Question / Help OBS Studio's preview/output stutters, game does not. (Help!)

[DKRecords]

First! Lets start with my Computer Specs.

Computer Specs:
Processor - AMD Ryzen TR 1950X OC(3.8GHz AllCore) Also Tried 4GHz To No Avail.
Motherboard - PRIME X399-A
Graphics Card - Nvidia GTX 770 4GB OC
Drives - SanDisk Extreme II 240GB, SanDisk Extreme II 120GB
Memory Kit - G.SKILL F4 DDR4 3200 C16 4x8GB (Tried Lower Timings CL15)
Capture Cards - Elgato HD 60, Elgato HD60 Pro, AVerMedia 4K Capture Card (GC573)
Webcam - Logitech C920 HD

I Have Tried The Following
- Limit Capture Frame rate
- Turning Off Psycho Visual Tuning
- Lowering Encoder Preset
- Using X264 Encoder
- Lowering In Game Settings
- Turning V-Sync On & Off
- 60.00Hz 59.94Hz 59.95Hz
- 1080p & 1440p
- Window Capture, Game Capture, Display Capture, (Display Capture seemed to work a little better.)
- Vulken API
- Disabling Overlays (In Game)

Video Showing The Issue.

Any Help At All Would Be Awesome!​