Portal RTX rec-specs released, coming 8th December.

Yeah even with Gsync, anything below 60 fps still has that render latency introduced so it feel janky even though the presentation of motion is "smooth" thanks to VRR. It's fine in games where it might sometimes dip to such framerates, whilst mostly staying at or above 60fps, but when a game is hitting 40fps or so at all times, yeah you notice that.
 
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Yeah even with Gsync, anything below 60 fps still has that render latency introduced so it feel janky even though the presentation of motion is "smooth" thanks to VRR. It's fine in games where it might sometimes dip to such framerates, whilst mostly staying at or above 60fps, but when a game is hitting 40fps or so at all times, yeah you notice that.
Is this OLED specific?

The Pendulum demo is a great demo which shows how gsyc performs vs not. Old now from 2013, but still useful - https://www.nvidia.com.tr/coolstuff/demos#!/g-sync
To me, 40fps with gsync is still ok, at 30fps it starts getting not so smooth.

Remember the good old days when 30fps 640 x 480 was the standard :)
 
Possibly due to OLED's 0.1ms pixel response time and natural smooth motion anyway - I tried that pendulum demo out and could not click the "gsync" button on the top left, only flick between no vsync and vsync, but then both appeared the exact same since the monitor is in gsync mode anyway and gsync will work with or without vsync being enabled. Maybe that demo is too old to work properly today though.
 
Possibly due to OLED's 0.1ms pixel response time and natural smooth motion anyway - I tried that pendulum demo out and could not click the "gsync" button on the top left, only flick between no vsync and vsync, but then both appeared the exact same since the monitor is in gsync mode anyway and gsync will work with or without vsync being enabled. Maybe that demo is too old to work properly today though.
I tried it on my Acer X34 predator G-Sync monitor
It certainly still works as it did in the past as I can tell the difference between no vsync, vsync and gsync.

I wonder if it only works on the older Gsync screens. On my monitor there's a sticker that says 'Nvidia G-Sync' I remember watching a clip about G-sync monitors and that they go through strict G-sync tests before they are officially certified. Not sure if that still happens or not but think there is a difference between Gsync and "GSync Compatible" and "FreeSync"
 
It's funny with oled and FPS levels, because of the pixel response time being instant i.e. 0.00001 ms, motion is incredibly "clean", zero ghosting no matter what fps you're at so this can make stutters and low fps more noticeable looking where as with LCD, due to its ghosting and poor motion in general, it masks low fps & stutter better yet it still somehow looks considerably worse than oled at the same fps :cry:
 
It's funny with oled and FPS levels, because of the pixel response time being instant i.e. 0.00001 ms, motion is incredibly "clean", zero ghosting no matter what fps you're at so this can make stutters and low fps more noticeable looking where as with LCD, due to its ghosting and poor motion in general, it masks low fps & stutter better yet it still somehow looks considerably worse than oled at the same fps :cry:
Every monitor looks good if you smear vaseline on your eye balls.
 
I just set DLSS to Performance to see what one level is like to play properly at 40-50fps (3440x1440 with Gsync and yeah it is perfectly playable, but you definitely notice that the frames are below 60fps as you would expect, Gsync just equalises out the display refresh to fps to smooth out the motion which is what you'd want rather than a sideshow-esque presentation.

I think my comment before was more related to being so used to higher framerates that the moment you get below 60fps, it feels strange and off - But you get accustomed to it and it's fine after a little while.

DLSS-Performance-Hz.gif


Render latency in this actually feels fine, feels like it's around 20ms tops, other games where the fps drops like Cyberpunk the render latency increases to 40+ms so this all is down to the game engine used I guess too. Vulkan is more efficient in this way than DirectX IIRC. I do have Reflex with Boost enabled however so that's probably why. Cyberpunk does not have Reflex support does it from what i recall.

I tried it on my Acer X34 predator G-Sync monitor
It certainly still works as it did in the past as I can tell the difference between no vsync, vsync and gsync.

I wonder if it only works on the older Gsync screens. On my monitor there's a sticker that says 'Nvidia G-Sync' I remember watching a clip about G-sync monitors and that they go through strict G-sync tests before they are officially certified. Not sure if that still happens or not but think there is a difference between Gsync and "GSync Compatible" and "FreeSync"
There are 3 types of Gsync, Gsync, Gsync Compatible, Gsync Ultimate

Gsync and Gsync Ultimate have the built in dedicated module, Gsync Compatible does not. Ultimate extends the capabilities buy adding stuff like HDR testing for 1000 nits etc.
 
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Portal is dx 8, nvidia remix tool can only mod dx 8 and 9 games.

That's bascially what I said in another thread, has this been cp 2077, no way would I stick less than 60 fps as min but with portal it's slow, can't even run so average fps of 50 with gsync is very playable.
 
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I tried it on my Acer X34 predator G-Sync monitor
It certainly still works as it did in the past as I can tell the difference between no vsync, vsync and gsync.

I wonder if it only works on the older Gsync screens. On my monitor there's a sticker that says 'Nvidia G-Sync' I remember watching a clip about G-sync monitors and that they go through strict G-sync tests before they are officially certified. Not sure if that still happens or not but think there is a difference between Gsync and "GSync Compatible" and "FreeSync"
It works on LG CX which is G Sync compat (no module)
Minor judder with vsync, smooth with gsync, tearing vsync off

Can also see the LFC if choose the 40-60 option as the TVs refresh rate goes to double <50 fps

In general I find low FPS content quite 'juddery' on the OLED due to pixel response I assume.
 
Just tested it on my older build 2070 Super, 9900k at 4.8, 32gb 3000ram, 1440p 95hz refresh monitor.

At 1440p get about 15 FPS with DLSS ultra 3 on, but the first room has a lot of RTX effects, the first level itself not as demanding. Have to drop it down to 1600x900 with DLSS 3 ultra to get a playable 40-50 FPS with lower drops, so not great at all, but passable to test out a few levels. Anything less than DLSS 3 Ultra not really worth it as you lose so many effects. It does still look good even at lower resolutions as ray tracing effects do a lot especially for more stark games. Can also press ALT+ X in game to get the extra RTX options menu.

I completed Quake 2 RTX recently, was able to get 1440p and 95hz native using DLSS on that one, but Portal RTX is a lot more demanding. I likely won't even bother with a full playthrough until I get a better GPU, but I'm definitely sold on RTX effects.

Anyone who can play this on good settings really should, especially if you've not played it before, Portal's an amazing game, with Portal 2 being even better that I'd love to see RTX come to as well. Even with just light sources and reflections working off each other in RTX games it adds a lot of atmosphere and immersion. I definitely recommend playing through the full game of Quake 2 RTX too, if you already own Quake 2 you can play the whole thing in RTX and not just the short demo.
 
Yep RT effects when implemented properly really are night and day vs screen space effects, although screen space has come a long long way from basic baked in light and shadows from old!

I loved sections like this, just how light behaves exactly how it would in reality, makes sense since it's all path traced :p

LightBounces.gif
 
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It would be good to see this level of rtx done in portal without the use of nvidia remix tool, I bet you performance would be better by a good chunk especially on amd hardware :p
 
Doom Eternal's engine using path tracing. You just know that would be amazing, an engine that is optimised to 100% and scales on literally any hardware. That would be a true test to see how demanding just RT is in a game engine, as don't think there is any other modern engine that is as efficient and scalable than Doom Eternal's. We already know that you can get over 150fps in Eternal with RT enabled without enabling any DLSS, so would be super interested to see how path tracing does in it.
 
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