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OBS (Full screen projector FPS drops)

Deactrals
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When full screen projecting my gaming monitor to a virtual display (capture card) my game has fps drops. Not spiking necessarily, but when playing it's mostly fine, for about 1-2 minutes and eventually it spikes down from my usual 100 + fps down to 80. This combined with a 144hz monitor ensures I have a horrible experience. 
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Just now, Deactrals said:
When full screen projecting my gaming monitor to a virtual display (capture card) my game has fps drops. Not spiking necessarily, but when playing it's mostly fine, for about 1-2 minutes and eventually it spikes down from my usual 100 + fps down to 80. This combined with a 144hz monitor ensures I have a horrible experience. 

what encoding are you using software or NVEC?

Sorry I probably edited my post. Refresh plz. Build Specs Below.

System

  • CPU
    Ryzen 9 5900x
  • Motherboard
    ASUS ROG STRIX X570-F
  • RAM
    16 GB (2X8) Trident Z Neo 3600MHz CAS 16
  • GPU
    ASUS ROG STRIX RTX 3070
  • Case
    Corsair 4000D Airflow
  • Storage
    Sabrent 1 TB TLC PCI 4.0 NVMe M.2
  • PSU
    NZXT C850 Gold PSU
  • Display(s)
    MSI Optix MAG342CQR 34" UWQHD
  • Cooling
    Corsair H100i RGB Pro XT 240mm
  • Operating System
    Windows 11
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5 minutes ago, mr fobs said:

what encoding are you using software or NVEC?

I am sorry and probably should've mentioned this earlier, but I am not actually using OBS to encode at all. The reason I am using this "Full screen projector" is to project my main monitor onto the virtual capture card. This means that I am not at all encoding, which makes this dillema further confusing since why would there be a performance impact on my game if I'm not encoding anything. This makes me believe that my games simply don't like being cloned, and I can use windows as a cloning source since it downscales my refresh rate

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