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Not sure what happened to my setup, but my performance has dropped considerably. My system is an ASUS P6T motherboard running with 18GB memory, and a XEON x5680 processor @ 3.62 Mhz running windows 10 insider preview build 14267.rs1_release.160213-0213. The graphics is via an EVGA GeForce GTX 970 with 4GB GDDR5 memory. http://www.newegg.com/Pr...spx?Item=N82E16814487076NVidia driver is dated 4/8/2015 version 9.18.13.5012 because newer versions caused a BSOD with dxgmms2.sys until recently, but newer versions that don't crash are also slower IMO. My vmix 16.0.0.115 output is set to 1280*720 NTSC 29.97p widescreen When opening a new preset, I am running anywhere from 20-27 FPS with render time of 48ms and CPU of 1-2%. This used to be 30FPS ~10ms and 1-2%CPU Decoders is set to auto. Any suggestions welcome.
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Rank: Advanced Member
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Just re-installed vmix and updated to the very latest video driver, and it appears to have improved things.
An empty preset now runs 30FPS render time is ~3ms and CPU: 1%.
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Rank: Advanced Member
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Go figure. I rebooted the machine, and now it's right back to poor performance. I re-installed again, and it's stuck at ~20FPS render:48ms, and CPU:0-1% on an empty preset.
What's causing my render time to get so poor?
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I had a similar experience with Windows 10 initially and had to do a reinstall of Windows 10. There was an issue with the driver being installed over a Windows updates if I remember correctly. There was also a WDDM that was not installed or incorrectly installed. I ended up disabling windows updates for the graphics drivers and doing a manual install and that got it working. My guess is that it's a driver error. Your computer setup should be getting rocking performance at 720p. Our system does 1080p60 with little issue and has close specs to your machine. I would play around with the video drivers and try to get the latest stable update of Windows 10.
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Thanks CloudMediaGroup!
It worked on the newer driver until I rebooted, and then I was not able to recover the performance until I downgraded to the previous driver again.
I really wish Micro$oft would get this fixed in 10. I am about 2 seconds from purchasing another drive, and re-installing windows 7 to this system.
It appears also that this system won't work now with my MS Lifecam Studio webcam. It lights up, but no image being captured. Works fine with my Windows 10 laptop.
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That's it! I'm going to dual boot to windows 7, and make 7 my vmix configuration.
Every time I reboot, no matter the driver version, it breaks my system performance. If I'm on the new driver, I have to revert to the older driver, and reboot, and all is fine until I reboot again, then I update to the newest driver, and without rebooting, I'm good until I reboot again, and it's broke again.
I'll setup windows 7 as a bare minimum system for vMix and OtsAV only, and do everything else in windows 10 as my normally preferred setup.
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Had similar results when I managed to put my GFX card in a PCI-e 1x slot (16x physical, 1x eletrical), checked that out?
Cheers,
Håvard
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It's in the dedicated x16 slot for gfx modules. The blue slot in the attached image. 
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Last night I updated to Windows 10 to check the performance compared to windows 8.1. I have already reinstalled 8.1 due to the latency (40-50ms in my case) Windows 8.1 is back to 3ms consistent. we have a very similar setup so I thought I would let you know. I don't know what the underlying cause is however.
cpilcher
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I have a Win7 Pro license for this machine already, but purchased an upgrade to Windows 8.1, and a new SSD to put it on that I should receive tomorrow. I know I can get the 3ms render time in 10, but I'm not going to reinstall my drivers every time I boot the machine to get it.
Thanks for the feedback.
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Rank: Advanced Member
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Wow! What a difference!
Got Windows 8.1 installed with it's latest NVidia drivers, installed vMix, and I am now running 10 inputs of which 3 are 1080p, 1 720p webcam feeds, there is 1 1080p 60fps video capture, a lum mask, a motion video loop and a virtual input for mixing in the mask.
This is now outputting smoothly a 1080 60FPS display with 7-8ms renders and using ~25% CPU on vMix. I haven't looked at the System resources as yet, but am pleased with the results, especially as I'll only be using 720p output anyhow.
Feel like I have plenty of headroom again!
If your thinking of upgrading to Windows 10 for vMix, I highly recommend against it.
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