Question / Help NVENC limitations 1080ti

[dWbstreet]

The OBS wizard rec'd using 6000 bitrate 720p/60 fps on my EVGA 1080ti FTW3 (NVENC encoder)

I reviewed the log just now, I have 4.7% lagged frames due to rendering lag/stalls (2310 total frames).

Can anyone let me know why the encoder is struggling?
I've tried it at lower resolutions and lower bitrates and lower fps (30).

Please advise.

 

[koala]

The bottleneck seems not the encoding itself but the transfer of the encoded frame from the graphics card memory to the main memory:
12:03:06.394: ┃ ┣download_frame: min=0 ms, median=0.002 ms, max=5431.31 ms, 99th percentile=44.957 ms

Is your GPU running in a pcie x16 slot in x16 mode? gpu-z is able to check this.

 

[dWbstreet]

ATTN: koala

Bus Interface on GPU-Z:
Indicates PCIe x 16 2.0 @ 16 2.0

Thanks for your time koala; do you have any more insights with this new information?
I had never noticed what you saw; I don't know where to go next.

I am very confused now, as my board indicates the slot where I installed the card is PCIe 3.0.
I have the MSI X79A-GD45 Plus

***Bus Interface now indicates PCIe x 16 3.0 @ 3.0
3.0 was disabled in BIOS.

 

[koala]

x16 must be on both sides of the @. On the left is the capability of the hardware and on the right is the actual data rate that is in use. Using pcie 3.0 is a bit faster, but should not matter very much.

 

[dWbstreet]

so here is the log after enabling 3.0
Still lagged frames
Koala, any suggestions my friend?

 

[OG See OH Zee]

You got only 0.5% lagged frames on the recent log compared to 4.7%. Since the game you're trying to stream is PUBG I have a guide on my signature on how to cap the FPS in the game. Check that out.

 

[koala]

Looks good. Although you doubled the fps to 60 for OBS, you got almost negligible stalled frames. Pcie 3.0 instead of 2.0 seems to make more difference than I thought. If you cap the fps of the game according to @OG See OH Zee, it might get even better. If you have a 60 fps monitor, it's best to let the game run at a maximum of 60 fps as well. No need to go higher.

 

[dWbstreet]

You got only 0.5% lagged frames on the recent log compared to 4.7%. Since the game you're trying to stream is PUBG I have a guide on my signature on how to cap the FPS in the game. Check that out.

Thanks so much my friend; I read your guide just a few minutes ago as I was scrolling through the new posts. I learned new things today: I appreciate the guide and the feedback.

 

[dWbstreet]

Looks good. Although you doubled the fps to 60 for OBS, you got almost negligible stalled frames. Pcie 3.0 instead of 2.0 seems to make more difference than I thought. If you cap the fps of the game according to @OG See OH Zee, it might get even better. If you have a 60 fps monitor, it's best to let the game run at a maximum of 60 fps as well. No need to go higher.

I was surprised as well! I would have never known I was on PCIe 2.0 if it wasn't for you: many, many thanks my friend!