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Nvidia GPU transcoding IQ

To me, Quicksync seems a lot better than the GTX 460 from those pics.

edit: read your post wrong, idk the reason but Quicksync seems pretty badass \: Is there any use for GPU accelerated encoding anymore?
 
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Looks good apart from I don't think it works on the P67 chipset, only the H67. As you can't overclock at all on H67 it's a move of madness by Intel.
 
Lucid, the Company most famous for their Hydra platform that allows any video cards to be SLI'd, are producing a software solution which will allow Quicksync + discrete graphics.

http://techreport.com/discussions.x/20217

I think they need to get their multi-GPU scaling sorted out first before I jump onto the Lucid wagon :p.

I'm actually suprised by the quality given by the 460. The others really do look better :confused:.

Quicksync was designed for movies, and this is where it excels, where as GPUs have 3D engines that have to adapt to 2D pictures. I'm guessing this is the main reason, although I'm also guessing it's software as well.
 
Looks good apart from I don't think it works on the P67 chipset, only the H67. As you can't overclock at all on H67 it's a move of madness by Intel.

Quick sync also won't work on H67, or the Z68 chipset when its out if you're using a discrete chipset. That might not be entirely true, I think that if you have a discrete gpu, but run at least two screens and have one screen attached to your discrete gpu, and one screen attached to the Intel output then you can use quicksync, but its hardly well intergrated, seamless, and easy.

GPU video acceleration, its a hard call, the reason quicksync is SO fast is its purely hardware, hardware accelerated just about anything will be massively faster than software programmed shaders on a gpu doing the same job.

GPU's will probably get some dedicated(more so than now) transcoding functions to be competitive. Its always the question about die space though, is it better to give 5% of the die to transcoding hardware that makes transcoding ALONE massively faster, or 5% die space on more shaders that can make transcoding a decent amount faster, but can do pretty much anything else you can program them to and accelerate whatever else you can think of.

Why Nvidia's transcoding is such horrible quality, and worse for me, why Anandtech in multiple Nvidia/AMD gpu reviews has NEVER mentioned how utterly rubbish it is, yet mention things like their transcoding software and CUDA as area's it beats AMD, considering Anandtech basically said throughout that AMD had the best quality, and decent speed for a gpu, but like Nvidia can't fight against completely dedicated hardware.


Quicksync's fantastic, what we need from Intel/AMD in their APU's is seamless intergration of the features and for almost any software to use the gpu/transcoding acceleration for anything that would be done better on the gpu than cpu.
 
Yes sorry to clarify guys if you run multi monitor then it's OK, if you are single monitor powered by a discrete card you don't get quick sync.

Essentially the GPU has to be actively used.
 
Yes sorry to clarify guys if you run multi monitor then it's OK, if you are single monitor powered by a discrete card you don't get quick sync.

Essentially the GPU has to be actively used.

Its not quite that simple though, the multi monitor has to, afaik, use the Intel output from the mobo for at least one screen. But I would assume that for instance, if you have a 6970 say, and a triple screen setup, you're unlikely to want to connect any of the screens through the intel output.

Gaming is by no means the only reason for multiple screens, but its one reason and there should be others that you'd want all the outputs connected to one screen.

Quicksync is certainly in its infancy, and it doesn't really use the gpu yet, just the transcode engine which is separate transistors to the "shader processor" type bits of the gpu. Theres still little/no acceleration most software on the gpu itself. AMD will have the same issue though maybe slightly less due to Nvidia/AMD pushing acceleration of flash, video and a few other things on gpu's for much longer and much harder than Intel.

The real question is can AMD's fusion seemlessly use both a discrete gpu and the ondie gpu, in some situations maybe, some maybe not.

I think both companies are pushing in the future(could be a couple gens, or quite a way down the line) for software to not see a gpu unless it needs to, and for the CPU/OS to decide where best to send certain instructions. We seem a pretty long and complex way from that kind of seamless usage for now though.

AMD really need to push on die gpu usage alongside discrete gpu asap, as theres only so long Intel's on die gpu's will be far behind AMD, push the advantage while its there.


Anyway the thread is really more about Nvidia quality, its nothing to do with it being a 3d/2d engine problem, nothing on a GPU is "3d" or 2d, its just processors, lots of small not very complex ones with a ludicrous amount of bandwidth and ability to run them all at the same time.

The thing responsible for poor quality on Nvidia gpu transcoding will be the software and the software alone. Why, don't know, have they sacrificed all quality for speed, is it just poorly coded and could be equally as fast with much better quality, or do they just not really care about it as in reality not many people spend that long transcoding stuff, they made an app, that uses CUDA and gets touted as a useful feature but thats enough, 99% of users won't use it so putting lots of time and effort making it fantastic is just a waste of cash, again who the heck knows.

As I said before, its a little irksome that the rubbishness of Nvidia's transcode quality hasn't been mentioned before in other reviews.

When its AMD vs Nvidia, reviewers just tend to carpet bomb the reviewer with the idea, that any gpgpu, any professional work, any video work, anything cuda, or physx, or any acceleration of anything non gaming Nvidia are the clear leaders without question and is touted as another reason to go Nvidia. THere are places Nvidia does lead AMD, and places AMD lead Nvidia. Its bad reviewing that so many reviewers seem to just concede all that non gaming arena to Nvidia without any comparison at all.
 
I think I'll use my next SB laptop for transcoding, when they arrive. Hopefully it will outperform my i7 950 at 4-4.5GHz as far as encodes are concerned.
 
Wouldn't you be able to use a VGA 'dummy plug' to make it think it's connected to a monitor to get the transcoding features to work?
 
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