RTX 3090 not performing well w/ OBS?

Spinelli

New Member
I watched a few videos about recording with OBS at high framerates such as 360 and 480 fps such as the following:

Something strange is going on though. The PC specs of the multiple videos I've watched are much lower than mine (eg. Ryzen 5 3600, RTX 2060 which doesn't come close to my CPU & GPU) yet I cannot even record at 240 fps let alone 360 or 480 fps. My recorded video ends up looking like literally less than 10 fps, huge frame drops. I enabled OBS stats and I'm dropping an incredible 80 - 90+ % of recorded frames.

My game itself is fine as it's an old game from 2005 and only has 25% GPU usage and around 30 - 35 % when OBS recording is activated (and low CPU usage as well). It's running 300 - 500 fps. I also locked it's frames to different amounts (including 240) but it makes no difference because the issue has nothing to do with the game. What I mean is, I changed OBS from the game capture mode to display capture mode and it's the same thing even when I have no game running and am just at the desktop.

At the desktop with no game running, I tried different presets and the issue happens with all presets except Max Performance (I didn't try the low latency ones, no idea what those are). The other 3, including "Performance" results in massive dropped recorded frames, like 80 - 90+ % dropped.

Whenever this happens, the 3090's NV Encoder in the Windows Task Manager shows it pegged at 100% even at 240 fps...How is this happening if people with way slower PCs can record at 360 and 480 fps?

I tried both 1080p and 1440p recording/canvas/output. I also tried CBR @ 60,000 bitrate and CQB @ quality 20 just like in the videos yet the recordings, even with no game running, show over 80% dropped recorded frames and looks almost like a slide show.

I'm so confused...


When it comes to NVENC, does the 3090 come with some sort of gimped NVENC chip compared to the GTX 1080 and RTX 2060? In all other areas, the 3090 obliterates the 2060 and 1080 so I'm very confused...


PC specs:
i9-12900KS @ 5.3 GHz all-core (e-cores disabled)
RTX 3090
2x 16GB Samsung B-die DDR4 @ 4200 MHz, 16-16-16-32 w/ tuned sub-timings, gear 1
System drive: Samsung 980 Pro 1TB
Game drive: Samsung 970 Evo+ 2TB
Recording drive: Samsung 970 Evo+ 2TB (separate one from the game drive)
 
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