Thanks ThoNohT for chiming in.
It is an audio studio computer that does the job so far. I inserted the simplest fan-less audio card. The rest is i7-920 @ 3.9 gHz, Gigabyte board EX58-UD3R, 16 GB DDR3. Do you think the rest of the system is too dated for OBS or would it suffice to swap the video card? Any recommendations?
Thanks, Hannes