SVP uses a lot of CPU and/or GPU resources consistently so it could just be either your CPU or GPU getting hot and your fans spinning up to max in response. Anyway, if your temperatures are stable, it's not a huge issue if you don't mind the fan noise.
This is normal for any resource-intensive program, even games like Red Dead Redemption 2 on optimal graphics settings push my GPU to 90-100% with very few drops, so temps go really high and my fans have to spin to max to keep temperatures stable. Get some system monitoring software like HWInfo (or even just the software that comes with Radeon cards, if applicable) and check CPU/GPU usage + CPU/GPU temp + CPU/GPU fan speeds.
If that's the issue then the free solution is:
- adjust SVP settings for lower target FPS
- adjust your fan curves so they run quieter without raising your temps to dangerous levels
- fix the airflow/fan setup in your case, maybe it isn't optimized
The non-free solution is to upgrade your coolers to something besides stock coolers, get a graphics card with a better bundled cooler, or add more case fans if your case isn't taking in enough cold air to keep your PC cool.