QUICKSYNC VS DXVA2 SOFTWARE

GPU temperature immediately dropped from 86C to 72C, load went from 80% to 48% and fan speed, from 82%, headed south to 54%, from which it can go no lower on my card. I thought little of the fact that none of these were checked, thinking, 'Hey, if this revision is supposed to 'just work', they'd already be enabled.' But I decided to try them anyway. More snooping lead me to the 'scaling algorithms', sections, all three of which contain radio buttons to enable DXVA2 processing, although this was grayed-out in the 'chroma upscaling' section. These were unchecked, and I decided to leave them so.

I did find the options for 'don't use copyback for DXVA' under 'rendering -> trade quality for performance'. However, further trials still showed no changed in the GPU load parameters, both for Blu-ray and DVD playback, so I decided to check the madVR settings as suggested by nevcairiel.įirst, I could see no setting for 'YADIF deinterlacing'. I did not reboot when upgrading from 180175 to 180177 yesterday, and I think that this must be the reason for the anomaly. My apologies for any head-scratching or confusion caused. Once home today, booting up revealed that my symptom of 100% CPU with no throttling was incorrect. I can't speak for what's best with AMD/Intel, and I don't know what you are currently using for them when hardware acceleration is enabled. I tested performance both on my main system with a GTX570, and with a low-end GT610 a while back (where performance really mattered) and DXVA2 Copy-Back performed best with both cards. DXVA2 Copy-Back generally performs better than CUVID does in my experience.Īnd DXVA2 Native is not a good solution for Nvidia, as it does not allow madVR's deinterlacing to work correctly. Deinterlacing is often activated when it should not be if CUVID decoding is used.ĥ. This has never happened since I set up LAV Video manually to use DXVA2 Copy-Back.Ĥ. The video keeps playing but the program is unresponsive. On my system Media Center will sometimes hang with the Hardware accelerate video decoding when possible option enabled.

DXVA2 Copy-Back seems to be more stable inside Media Center. I haven't done extensive testing of this though.ģ.

QUICKSYNC VS DXVA2 SOFTWARE

This can be a problem with hardware acceleration in general (seems to be less tolerant than software decoding) but seemed to be more of an issue with CUVID. Some videos show decoding errors when using CUVID. With a high powered graphics card such as my GTX 570, most of that benefit is lost.ĭXVA2 Copy-Back allows the graphics card to drop down to the medium power state if the GPU load is low enough.Ģ. One of the reasons to use hardware accelerated decoding is to reduce power consumption.

CUVID forces the graphics card into its highest performance state. As discussed here, I feel that DXVA2 Copy-Back in LAV Video is a better choice than CUVID for hardware acceleration with Nvidia graphics cards.ġ.

Quicksync vs dxva2