Video Processor clocking

linx11 · **Video Processor clocking -** 09-24-2008, 05:28 | posts: 746

Hi Unwinder,

Are there any plans to enable adjustment of the video processor to help speed up video decoding?

Quote:

When getting full VP utilization, without any 3D bottleneck, the perf of the 8500GT should be very close to a 9800GTX, since IIRC the video processor is clocked at the same speed on both, though this could depend on the manufacturer (usually it is running at 450MHz, but some low-end GPUs are only running VP at 400MHz).

http://neuron2.net/dgavcdecnv/cuda/cuda.html

Unwinder · 09-24-2008, 06:39 | posts: 10,312 | Location: Taganrog, Russia

There are no plans because the text quoted there is a technical nonsense.

linx11 · 09-24-2008, 08:02 | posts: 746

Quote:

Originally Posted by Unwinder

text quoted there is a technical nonsense.

That was supposed to have been said by a nvidia engineer.

And wouldn't the video processor be the purevideo decoder. Because if I use the program listed above, I get a faster decode time with little cpu usage and no increase in core temps.

Unwinder · 09-25-2008, 07:55 | posts: 10,312 | Location: Taganrog, Russia

Quote:

Originally Posted by linx11

That was supposed to have been said by a nvidia engineer.

Hmm, interesting. I did some researches tonight and it looks like there is indeed separate 4xx MHz clocked domain in the chip which can be used to feed VP independently of SPs. However, forget about controlling it: drivers doesn't provide overclocking support for it and implementing low-level way doesn't worth the efforts from my POV.

linx11 · 08-24-2009, 14:15 | posts: 746

Quote:

Originally Posted by Unwinder

drivers doesn't provide overclocking support for it and implementing low-level way doesn't worth the efforts from my POV.

Hi Unwinder. Has driver support changed and/or has your interest level increased?

roguesn1per · 09-24-2008, 06:51 | posts: 9,514 | Location: Aussie Perth WA

Why speed up decoding?

You can run a 1080p File with a 8500gt fine, Why "try" make it go faster?

linx11 · 09-24-2008, 07:51 | posts: 746

Quote:

Originally Posted by roguesn1per

Why speed up decoding?

For transcoding video content using this.
http://neuron2.net/dgavcdecnv/dgavcdecnv.html

http://forum.doom9.org/showthread.php?t=141104

roguesn1per · *Last edited by roguesn1per; 09-24-2008 at 09:14.*

Edit my mistake..

this is for decoding..

inst this a bit pointless?

The CoreAVC codec can play 1080p files even on a 1Ghz cpu

linx11 · 09-24-2008, 12:55 | posts: 746

Quote:

Originally Posted by roguesn1per

inst this a bit pointless?
The CoreAVC codec can play 1080p files even on a 1Ghz cpu

This has nothing to do with playback.

Please read before posting again.

http://en.wikipedia.org/wiki/Transcode

linx11 · 09-25-2008, 08:18 | posts: 746

Thanks for your reply and confirmation that it exists.

Maybe one day.

roguesn1per · 09-25-2008, 09:51 | posts: 9,514 | Location: Aussie Perth WA

Even if you could control it, I dont think it would clock very high, 20mhz at most, as im sure its linked/locked to a certain bus, Plus as far as i know the chip doesnt have cooling on it.

But if someone manages to do it, good on em.

DAMAFIA · 10-22-2008, 18:41 | posts: 209 | Location: SUNNY SCUNNY

wud be good to have a world first tho unwinder lol