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seb666  
#1 Posted : Wednesday, June 24, 2020 6:06:42 AM(UTC)
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Hi,

we've got a new ThreadRipper based system (3970X CPU, RTX2080 Super GPU, 64GB RAM, 2 x M.2 SSD, 2 x BMD Decklink 8K Pro) and I'v got problems with the machine.

Preset looked like this:
Logitech BRIO 4K
7 x vMixCall
NDI signal from another vMix machine
2 x NDI signals to other vMix machines
some PNG backdrops and some frames made in GT Titler to assemble different multiviews for the callers
an MP4 video with a countdown animation (I know how to do that in vMix, but the agency wanted something nicer)
The preset was set to 1080p30.

All in all it were something around 30 inputs, which is laughable in comparison to other setups, where I handled more than 100 different inputs with vMixCall, different camera sources (NDI, NDI|HX, Blackmagic capture cards). But this overkill system we built, couldn't handle the inputs with recording and streaming. Render times switched between something under 10ms to over 30ms and I got multiple GPU Overload messages.

I already reinstalled the machine because I thought, something went wrong with the installation. At the moment the system only has installed Focusrite Control, Blackmagic Drivers, vMix, Skaarhoj vMix Bridge (ok, just a binary without installation) and that's it.

Any idea where I should start looking for possible fails and fixes?

Regards
Seb

DWAM  
#2 Posted : Wednesday, June 24, 2020 6:10:40 AM(UTC)
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vMix diagnostics ?
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seb666 on 6/24/2020(UTC)
stigaard  
#3 Posted : Wednesday, June 24, 2020 6:12:07 AM(UTC)
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Have you enabled High performance input under settings?
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seb666 on 6/24/2020(UTC)
seb666  
#4 Posted : Wednesday, June 24, 2020 6:19:56 AM(UTC)
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Originally Posted by: DWAM Go to Quoted Post
vMix diagnostics ?


Did that and it said, that everything's fine.
seb666  
#5 Posted : Wednesday, June 24, 2020 6:34:05 AM(UTC)
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Originally Posted by: stigaard Go to Quoted Post
Have you enabled High performance input under settings?


Yes, of course. :)

And I already checked the Nvidia settings, Windows Power Plan settings and other usual stuff. Maybe I should have mentioned that. Sorry...
stigaard  
#6 Posted : Wednesday, June 24, 2020 6:49:49 AM(UTC)
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Is the gpu card plugged in a x16 slot?
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seb666 on 6/24/2020(UTC)
seb666  
#7 Posted : Wednesday, June 24, 2020 3:02:44 PM(UTC)
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Originally Posted by: stigaard Go to Quoted Post
Is the gpu card plugged in a x16 slot?


Yes, it is. But even if the card would have been in an x8 slot I would expect better performance.
Peter1000  
#8 Posted : Wednesday, June 24, 2020 5:01:16 PM(UTC)
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try to remove the BM cards. it could be a problem with PCIE lanes, since you have also 2 M2 SSD's, they share the lanes.
when the problem is gone, add one card at a time. if the problem persists, it must be something else :-(
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seb666 on 6/25/2020(UTC)
xaver  
#9 Posted : Wednesday, June 24, 2020 8:40:23 PM(UTC)
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It also could be the order of the cards
so aslo try to place the GPU in an other slot

what's the MB ypu use?
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seb666 on 6/25/2020(UTC)
seb666  
#10 Posted : Thursday, June 25, 2020 2:55:43 AM(UTC)
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Originally Posted by: xaver Go to Quoted Post
It also could be the order of the cards
so aslo try to place the GPU in an other slot

what's the MB ypu use?


I tried different slot positions and ran in the same problems. It's an ASUS ROG Zenith II Extreme.
seb666  
#11 Posted : Thursday, June 25, 2020 2:57:07 AM(UTC)
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Originally Posted by: Peter1000 Go to Quoted Post
try to remove the BM cards. it could be a problem with PCIE lanes, since you have also 2 M2 SSD's, they share the lanes.
when the problem is gone, add one card at a time. if the problem persists, it must be something else :-(


The CPU offers 72 PCIe lanes. My whole setup takes a bit more than half of that. But yes, I'll try without capture cards. Thanks.
seb666  
#12 Posted : Monday, June 29, 2020 1:44:40 AM(UTC)
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I removed the Blackmagic Decklink 8K cards and did a fresh installation of Windows. Besides all mainboard drivers I only installed the Nvidia drivers and vMix.

My test setup was a vMixCall preset in 1080p25: I had 8 incoming calls, did an MP4 recording in 75 MBit/s, a stream in 2,5 MBit/s 720p, recorded all vMixCalls in MultiCorder and used a playlist to switch between inputs. When starting the MultiCorder render times went over 90 ms for a moment and then they went back and forth from around 9 ms to around 30 ms all the time and I got a "GPU Overload" message. CPU usage at that moment was around 5 to 7 %...

Also without the MultiCorder I never got stable render times. My test today was relatively short. So I can't say, if I run into "GPU Overload" without the MultiCorder, bun anyway something seems to be wrong. I used vMixCall with much, much lower specs and it went perfectly well. This machine should do the work easily without any errors or problems.
Vince Beck  
#13 Posted : Monday, June 29, 2020 4:47:42 AM(UTC)
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A couple more things. Make sure you have no browser running, Google Sheets, Vimeo are both notorious for sucking the performance our of a computer.

Go to your Nvidia settings and be sure to add Vmix64 under the program performance tab and set it to high performance.

Double check your power settings under advanced and make sure everything is set to high performance.
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