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Review: AMD FreeSync With the Acer XG270HU Monitor
Join us as we review AMD FreeSync with a 499 EURO costing FreeSync compatible Acer (27-inch 2560x1440p - 144Hz) screen. Following NVIDIAs GSync AMD took a different approach, no more tearing and vsync stuttering during game-play if you create a setup that is compatible.
Read all about it in this article right here.
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Review: Corsair Carbide 100R Silent - 03/06/2015 09:07 AM
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Review: ECS Z97I-Drone motherboard - 03/03/2015 09:48 AM
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Noisiv
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Senior Member
Posts: 8185
Joined: 2010-11-16
#5033053 Posted on: 03/20/2015 05:25 PM
That would depend on frame delivery and it's consistency (Vsync off)
No stutter with relatively even frame delivery. This is smooth as it gets:
This is problematic, less so on high fps:
Stutter occurs when FPS and refresh rate are mismatched whether VSync is on or off.
That would depend on frame delivery and it's consistency (Vsync off)
No stutter with relatively even frame delivery. This is smooth as it gets:
This is problematic, less so on high fps:
mR Yellow
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Posts: 1935
Joined: 2005-02-02
Senior Member
Posts: 1935
Joined: 2005-02-02
#5033135 Posted on: 03/20/2015 07:05 PM
More importantly, where are the drivers?
More importantly, where are the drivers?
pharma
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Posts: 1942
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Senior Member
Posts: 1942
Joined: 2003-09-10
#5033497 Posted on: 03/21/2015 01:52 AM
No mention of the Ghosting issue mentioned in the PCPer review and some others? Could be a disaster for this "standard" if additional hardware is required in Freesync monitors to resolve this issue.
Seems that may be the case since Nvidia states in the PCPer article:
Ghosting Concerns: http://www.pcper.com/reviews/Displays/AMD-FreeSync-First-Impressions-and-Technical-Discussion
Example video comparison:
https://www.youtube.com/watch?feature=player-embedded&v=-ylLnT2yKyA
Edit: Someone did post on the Ghosting issue and included a jpeg. I've also added video comparison.
No mention of the Ghosting issue mentioned in the PCPer review and some others? Could be a disaster for this "standard" if additional hardware is required in Freesync monitors to resolve this issue.
Seems that may be the case since Nvidia states in the PCPer article:
NVIDIA claims its G-Sync module is tuned for each display to prevent ghosting by change the amount of voltage going to pixels at different refresh rates, allowing pixels to untwist and retwist at different rates.
Ghosting Concerns: http://www.pcper.com/reviews/Displays/AMD-FreeSync-First-Impressions-and-Technical-Discussion
Example video comparison:
https://www.youtube.com/watch?feature=player-embedded&v=-ylLnT2yKyA
Edit: Someone did post on the Ghosting issue and included a jpeg. I've also added video comparison.
yasamoka
Senior Member
Posts: 4864
Joined: 2009-08-29
Senior Member
Posts: 4864
Joined: 2009-08-29
#5033566 Posted on: 03/21/2015 03:42 AM
That would depend on frame delivery and it's consistency (Vsync off)
No stutter with relatively even frame delivery. This is smooth as it gets:
This is problematic, less so on high fps:
Even if it's perfectly even frame delivery, if it's not at a perfect divisor of the refresh rate, it will stutter. Lock 45FPS at 60Hz and try it out. Then change your refresh rate to 45Hz and try 45FPS again.
You're sampling an input of 45Hz at 60Hz --> stutter.
That would depend on frame delivery and it's consistency (Vsync off)
No stutter with relatively even frame delivery. This is smooth as it gets:
This is problematic, less so on high fps:
Even if it's perfectly even frame delivery, if it's not at a perfect divisor of the refresh rate, it will stutter. Lock 45FPS at 60Hz and try it out. Then change your refresh rate to 45Hz and try 45FPS again.
You're sampling an input of 45Hz at 60Hz --> stutter.
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Now that FreeSync/GSync have become reality, I am thinking what's their REAL advantage over 144Hz/high MHz monitors?
Yes I know:
Vsync thats as responsive as Vsync OFF, but how noticeable is 144Mhz tearing.. really. I know it's there...
Stutter occurs when FPS and refresh rate are mismatched whether VSync is on or off. VSync on pushes back frames causing the "soft sync stutter" Hilbert frequently mentions in his G-Sync / FreeSync reviews where frametimes jump between 1 / refresh rate and 2 / refresh rate. G-Sync / FreeSync solve both by giving us the fluidity of VSync on @ refresh rate now equal to FPS without the input lag associated with VSync on.
The real advantage - fixed refresh rate should never have existed with sample-and-hold technology such as LCD in the first place. We understand this was because CRTs had to refresh their screen at a constant speed but now this isn't the case.
The funny thing, however, is that we used to assume that only CRTs needed to constantly refresh the screen so as to avoid artifacts (phosphor decay in the case of CRT which leads to flicker if not excited in time during the next refresh). This assumption has been proven false first with the overclockable Korean monitors (changing the refresh rate caused a change of color with the 2013-(early)2014 PLS panel batch), and now with G-Sync and FreeSync. If LCD panels don't get refreshed in due time, the pixels will fade away, causing flicker. Granted, the effect would be more extreme in CRTs given that phosphor decay happens extremely fast ~1-2ms so the CRT has to keep drawing the image, but this raises the question as to whether LCD can really be called a "non-refresh" technology.