Typically you'll be using the dGPU for video decoding since it's closer to the display pipeline. However you can totally use QuickSync for video encoding, even with a dGPU.
Ah yes, QuickSync in particular was a question for me. While NVENC certainly does do a fine job, if I have a hardware encoder laying dormant in the CPU, it might as well do stream encoding for me :)
I just messed about with NVENC, QSVEncC and x265 when ripping som DVDs. X265 still gives the best quality and size. With a i5-6500, the encoding speed wasn't all that, at around 65 fps. Of course, QSVEncC was closer to 200 fps and NVENC (GTX 1070) clocked in at 1300-2000 FPS.
Quality and size of the file are of course the opposite, with x265 looking the best and being the smallest, then QSVEncC and finally NVENC.
Can you? Last I looked, that required enabling both the dGPU and iGPU simultaneously (and simply not plugging a monitor into the iGPU). Attempts to enable the iGPU while having a dGPU plugged in on my Ivy Bridge resulted in Windows not booting.
I can't speak for your system, but my Z77 motherboard features Virtu multi-GPU support that allows me to use Quick Sync while having my monitor plugged into my dGPU. You have to activate both IGP and dGPU in BIOS, then load both drivers. It worked for me under W7 and W10.
Errm, you've got dedicated hardware specifically for the purpose of supporting multiple GPUs (the Lucid Virtu), so that's not really a typical example.
Last I checked, it requires motherboard support. You can't just install some software and expect it to work. That's what they meant by dedicated hardware.
yep, there is a chip that enable the virtu stuff. It is little more than a soft-switch to route traffic to the right chip, but still required for the software to work.
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hansmuff - Tuesday, August 30, 2016 - link
Does any of the new fixed-function logic that is part of the GPU get to work when I use a discrete GPU instead of the integrated?I remember that on my old SB chip, the GPU just was turned off because I use discrete. How have things changed, if at all?
Ryan Smith - Tuesday, August 30, 2016 - link
Typically you'll be using the dGPU for video decoding since it's closer to the display pipeline. However you can totally use QuickSync for video encoding, even with a dGPU.hansmuff - Tuesday, August 30, 2016 - link
Ah yes, QuickSync in particular was a question for me. While NVENC certainly does do a fine job, if I have a hardware encoder laying dormant in the CPU, it might as well do stream encoding for me :)fabarati - Tuesday, August 30, 2016 - link
I just messed about with NVENC, QSVEncC and x265 when ripping som DVDs. X265 still gives the best quality and size. With a i5-6500, the encoding speed wasn't all that, at around 65 fps. Of course, QSVEncC was closer to 200 fps and NVENC (GTX 1070) clocked in at 1300-2000 FPS.Quality and size of the file are of course the opposite, with x265 looking the best and being the smallest, then QSVEncC and finally NVENC.
Guspaz - Tuesday, August 30, 2016 - link
Can you? Last I looked, that required enabling both the dGPU and iGPU simultaneously (and simply not plugging a monitor into the iGPU). Attempts to enable the iGPU while having a dGPU plugged in on my Ivy Bridge resulted in Windows not booting.nathanddrews - Tuesday, August 30, 2016 - link
I can't speak for your system, but my Z77 motherboard features Virtu multi-GPU support that allows me to use Quick Sync while having my monitor plugged into my dGPU. You have to activate both IGP and dGPU in BIOS, then load both drivers. It worked for me under W7 and W10.Guspaz - Tuesday, August 30, 2016 - link
Errm, you've got dedicated hardware specifically for the purpose of supporting multiple GPUs (the Lucid Virtu), so that's not really a typical example.extide - Tuesday, August 30, 2016 - link
Lucid Virtu is all softwareGigaplex - Tuesday, August 30, 2016 - link
Last I checked, it requires motherboard support. You can't just install some software and expect it to work. That's what they meant by dedicated hardware.CaedenV - Tuesday, August 30, 2016 - link
yep, there is a chip that enable the virtu stuff. It is little more than a soft-switch to route traffic to the right chip, but still required for the software to work.