Freesync now works with non-Freesync monitors with CRU.

[nathanddrews]

So I saw something regarding CRT compatibility. I'm using a DVI to VGA adapter for my CRT, but it seems like most of the success of this is centered around HDMI... OMG if I could have FreeSync on my CRT, I would lose my mind.

 

[Teerhand]

Explanation on how it works from ToastyX: http://forums.guru3d.com/showpost.php?p=5342107&postcount=39

Quote:
"
Clearly some people here don't actually understand how FreeSync works. Don't assume this is impossible if you haven't tested it. Otherwise, you're just filling this thread with nonsense. People want to see results, not conjecture.

FreeSync works by varying the vertical blanking interval. ALL monitors support vertical blanking. It's part of the video signal. It's how the monitor knows where one frame ends and the next frame begins. The only question is whether the monitor can handle variable vertical blanking and longer blanking intervals. CRT monitors are basically controlled directly by the video signal, so this is more likely to work with a CRT. LCD monitors without scalers and laptop screens might also work. AMD themselves even demonstrated it working on existing hardware.

The problem is most LCD monitors on the market have scalers. LCD monitors with scalers are less likely to work without firmware changes because the scalers are usually designed to handle a limited range of refresh rates and timing parameters. The fact that some monitors are blacking out shows that it's actually doing something to the video signal and not just a driver toggle.

I can't test this right now because I don't have a FreeSync-capable video card, but I have one on the way. I wouldn't have thought to test this with a CRT, so OnnA deserves credit for that. Unfortunately, the only CRT I have is an old 14" with a limited range, but I also have an LCD monitor without a scaler that I'd like to test this on.
"

I wouldn´t be so sure if it´s ToastyX, who wrote that, since it states New Member to Guru3d in the description! So as far as I know, thats just some dude who took that as a username a week ago
Toasty himself on monitortest.com, where he´s an admin, is just as sceptical as anybody else.
Furthermore the guy who states all this freesync stuff is a new member himself, with no credibitity whatsoever.

Gentleman don´t be fooled.

 

[Teerhand]

And by all means guys, don´t buy a rx 480, because of that unproven chitchat, it´s just the same as those 100W max power consumption rx 480´s lol

 

[mtrai]

I am the dude who figured this out and sorry to see an old thread as , but ran across this thread. I know someone here stated I was a new person on guru3d which by far I am not, as I use the same screen name and across other forums for well over a decade. Yes for me it was just a proof of testing a concept based on some early tech pages I ran across from AMD on the net.

As far as toastyx posting on guru3d, thtat is up to him but I do know it was him as we did work on the finer details together as to what we could figure out. However me and him differ in how it works, mine is based on the tech specs that amd released about freesync over HDMI and how they originally implemented freesync. What Onna refers to is adaptive sync and CRT do have a form of all this called multi-sync but it really is not what he did, which is not to say that some of freesync tech could not work with multi-sync What one has to know is how AMD implemented freesync vs Nvidia g-sync. AMD choose to use existing monitor already contained within the monitors already sold, aka the hardware controller chips and add code to the existing hardware where as nvidia choose to create new hardware (I never bothered to check into the exact new hard gsync hardware they created) What this meant actually for AMD freesync was it could be possible since some peoples hardware already had the certain "approved AMD chips" to make it work fully or partially.

So yes it is possible but there are too many variables to make it a viable thing for main stream and even further there are some other hardware considerations.that come into play, it may work for one but not work for another assuming the same monitor.