QuickSync and decoding (LAV/madVR)

[MrGlasspoole]

Hi,

next month i get a new PC and i never looked at the QuickSync and iGPU stuff.
QuickSync is in the Haswell GPU?
So if you use QuickSync then the CPU is not stressed?

The question is because LAV can use QuickSync.
So if i use QuickSync for hardware decoding and a dedicated GPU for madVR = more power?
And also the CPU is free for other tasks (sure if its not for example Hi10p)?

Does that work? There was this Virtu MVP thing with Sandy, but how is the situation today with Haswell?

And what can QuickSync do when it comes to 4K? I cant really find an answer (specs).

Edit
Got my answer on AVS Forum from renethx:
Any 'dedicated' GPU also has ASIC for video decoding. You can use either that or QS. MadVR's video processing uses GPU's shader units, that's independent of the decoding ASIC.
So performance wise its the same.

But can i use the iGPU for programs and a dedicated GPU for gaming on Haswell.
I think about P4600 for CAT stuff and the dedicated GPU for the rest.

[huhn]

DXVA is faster than quicksync because quicksync is a copyback decoder this has an effect on the CPU and GPU.

if you buy a AMD GPU and windows 8 you can use quicksync to decode UHD what AMD can't do.

quicksync can decode h264 UHD 60 fps with more than 300 mbit.

using a hardware decoder is not very important on a new intel CPU they are more than powerful enough to do it in software and it's not rare that you can spare power by using the CPU not the GPU this depends hard on the dedicated GPU.

I highly recommand to buy a xeon CPU if you buy a dedicated GPU anyway.