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[TR] Nvidia responds to AMD's ''free sync'' demo  

post #1 of 321
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http://www.pcper.com/reviews/Graphics-Cards/AMD-Variable-Refresh-FreeSync-Could-Be-Alternative-NVIDIA-G-Sync
Quote:
All that is needed for this to work, as AMD explained it, was an eDP connection between the discrete GPU and the display, a controller for the screen that understands the variable refresh rate methods of eDP 1.0 specifications and an updated AMD driver to properly send it the signals. The panel can communicate that it supports this variable refresh technology to the graphics card through the EDID as resolutions and timings are communicated today and then the graphics driver would know to send the varying vblank signals to adjust panel refresh times on the fly.

If you aren't familiar with eDP, don't feel bad. It's a connection type used in tablets and notebooks and isn't used at all in desktop configurations (some all-in-one designs do use eDP). But here is where it might get interesting: the upcoming DisplayPort 1.3 standard actually includes the same variable refresh rate specification. That means that upcoming DP 1.3 panels COULD support variable refresh technology in an identical way to what we saw demoed with the Toshiba laptops today. DP 1.3 is on schedule to be ratified as a standard in the next 60-90 days and from there we'll have some unknown wait time before we begin to see monitors using DP 1.3 technology in them.

http://techreport.com/news/25878/nvidia-responds-to-amd-free-sync-demo
Quote:
He first said, of course, that he was excited to see his competitor taking an interest in dynamic refresh rates and thinking that the technology could offer benefits for gamers. In his view, AMD interest was validation of Nvidia's work in this area.

However, Petersen quickly pointed out an important detail about AMD's "free sync" demo: it was conducted on laptop systems. Laptops, he explained, have a different display architecture than desktops, with a more direct interface between the GPU and the LCD panel, generally based on standards like LVDS or eDP (embedded DisplayPort). Desktop monitors use other interfaces, like HDMI and DisplayPort, and typically have a scaler chip situated in the path between the GPU and the panel. As a result, a feature like variable refresh is nearly impossible to implement on a desktop monitor as things now stand.

Article has some additional points such as what AMD expects to happen for Freesync to be adopted and when DP 1.3 will be released.

You will have to go back later to PCper to find out what desktop displays have the prototypes for DP 1.3 already implemented because this info is hard to pin down even for AMD.
post #2 of 321
Then the commercial monitor produtcs with FreeSynch support not exist yet.
Support to the tecnology is required like Gsynch.

I Thinked Free Synch was supported by all monitors, almost the modern models, another epic fail by AMD. mad.gif
post #3 of 321
Quote:
Originally Posted by senna89 View Post

Then the commercial monitor produtcs with FreeSynch support not exist yet.
Support to the tecnology is required like Gsynch.

I Thinked Free Synch was supported by all monitors, almost the modern models, another epic fail by AMD. mad.gif

How the hell is it an AMD fail? It was forum hype that made it sound like it was supported by all monitors, not AMD themselves. All AMD said was that they were able to use vblank, which is a part of VESA standards, to do variable refresh rates.

Whether or not it really is a fail depends on how much it costs to implement, and how it performs compared to G-sync.
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post #4 of 321
More to the point, what this simply requires is that the companies moving forward implement the new displayport standard for it to function. It's probably not going to be retroactively supported, no, but it's also not like Freesync requires the monitor manufacturers to partner up with AMD for their proprietary hardware. rolleyes.gif

As long as it follows the standards set by VESA and includes the correct DisplayPort version Freesync should work with most monitors, far as I understand this.
post #5 of 321
Quote:
Originally Posted by senna89 View Post

Then the commercial monitor produtcs with FreeSynch support not exist yet.
Support to the tecnology is required like Gsynch.

I Thinked Free Synch was supported by all monitors, almost the modern models, another epic fail by AMD. mad.gif

Others beat me to it:
How is this a fail? Seriously ignorant.

If anything this is an nvidia fail due to the fact that they are selling people display controllers and displays with modified controllers to support somthing that appearently will be supported by DEFAULT when DP 1.3 hits...

EDIT: And limiting it to THEIR GPUs to boot!
post #6 of 321
There has been no evidence that freesync improves vsync input lag. In the demos they had vsync enabled on both monitors and one with freesync and one without. If it requires extra equipment AND still doesn't fix input lag, then it's worthless to me.
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post #7 of 321

[techreport] Nvidia responds to AMD's ''free sync'' demo

Quote:
He first said, of course, that he was excited to see his competitor taking an interest in dynamic refresh rates and thinking that the technology could offer benefits for gamers. In his view, AMD interest was validation of Nvidia's work in this area.

However, Petersen quickly pointed out an important detail about AMD's "free sync" demo: it was conducted on laptop systems. Laptops, he explained, have a different display architecture than desktops, with a more direct interface between the GPU and the LCD panel, generally based on standards like LVDS or eDP (embedded DisplayPort). Desktop monitors use other interfaces, like HDMI and DisplayPort, and typically have a scaler chip situated in the path between the GPU and the panel. As a result, a feature like variable refresh is nearly impossible to implement on a desktop monitor as things now stand.

Source
post #8 of 321
Quote:
Originally Posted by Syan48306 View Post

If it requires extra equipment AND still doesn't fix input lag, then it's worthless to me.

I think the point of Freesync was that it wouldn't require any additional equipment, but instead uses existing (eDP) or already upcoming standards (DP 1.3).
post #9 of 321
And now we've got a third thread on the first page discussing this topic. thinking.gif

eDP is different from what we've got, yes. However, DisplayPort 1.3 is expected to have the features that Freesync requires.
post #10 of 321
Very interesting, although didn't some article say that certain cables do work? I don't really care about all this sync tech, but I guess it is a nice feature to have. I have never had any issues with tearing and I don't use Vsync because it causes horrible input lag
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