Boost merely ensures the GPU stays at its max base clock speed or higher (aka doesn't downclock below base), which does not guarantee an increase in actual GPU usage at that clock speed.
NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
Thank you, will take a note. Also, just noticed I wrote "crap" instead of "cap" lol, edited.jorimt wrote: ↑19 Oct 2022, 09:47The only input latency difference between G-SYNC on + V-SYNC on + an FPS limit within the refresh rate and G-SYNC off + V-SYNC off is tearing; the former won't, the latter will.TheKelz wrote: ↑19 Oct 2022, 09:17I've chosen to go with GSync + NVCP VSync + Reflex Boost (which limits FPS to 138) with this game, but I can still notice input lag compared to GSync and VSync off (but it becomes stuttery/jittery as well). Would putting FPS cap lower than 138 help with this input lag?
Tearing artifacts are causing both the "stuttery/jittery" feel, as well as any slightly faster frame delivery due to those very tears in the G-SYNC off + V-SYNC off scenario. G-SYNC prevents tearing by dynamically steering the tearline off-screen.
If you're using G-SYNC on + NVCP V-SYNC on + Reflex Boost (the last of which is both preventing the framerate from exceeding the G-SYNC range, as well as any additional render queue latency [unrelated to G-SYNC operation] whenever the GPU is maxed), then it's as low latency a tear-free syncing method can get on a 144Hz monitor.
So no, a lower-than 138 FPS won't reduce latency further in your particular scenario. Any lower latency would require a higher max Hz (aka larger G-SYNC range) and/or tearing at that same Hz.
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
Knew what you meant I've now edited it in the remaining quote instances for you regardless.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
Is the fps limit that Reflex applies (when Vsync+Gsync on) the same as the NVCP max frame rate limit? I know there are differences between RTSS limit, nvcp limit, and in-game limits, in terms of input latency, so I'm curious which is the lowest-latency method for limiting.
As an example. With OW2, If I enabled Reflex with my 175hz monitor it caps at 166 fps. Is that "fps limiter" function lower latency than setting an in-game cap to 166 vs RTSS at 166, vs NVCP 166? Or does reflex somehow set the limit without inducing frame limiter latency like the other methods do?
As an example. With OW2, If I enabled Reflex with my 175hz monitor it caps at 166 fps. Is that "fps limiter" function lower latency than setting an in-game cap to 166 vs RTSS at 166, vs NVCP 166? Or does reflex somehow set the limit without inducing frame limiter latency like the other methods do?
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
I tested this very thing a while back. See:
viewtopic.php?f=5&t=9151&p=72211#p72182
Short answer: the Reflex limiter, unlike NVCP MFR or RTSS, appears to be implemented at the engine-level, and is thus as low latency as the in-game limiter.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
Great, thank you.
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Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
I have games that are CPU bound maybe 80% of the time and GPU bound 20% of the time. Should I just enable Reflex if game supports it just in case it helps? I think the answer hinges on whether Reflex has any negative side effects. I heard ULLM can increase stutters when CPU can't keep up. Same idea here?
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
Unlike ULLM, Reflex doesn't actually adjust the amount or timing of pre-rendered frames in the render queue (which can cause stutter), but instead monitors whether the GPU usage is maxed.BoredErica wrote: ↑19 Nov 2022, 08:44I have games that are CPU bound maybe 80% of the time and GPU bound 20% of the time. Should I just enable Reflex if game supports it just in case it helps? I think the answer hinges on whether Reflex has any negative side effects. I heard ULLM can increase stutters when CPU can't keep up. Same idea here?
If/when it is, Reflex sets a dynamic engine-level framerate limit slightly below the currently sustainable average framerate as to prevent the GPU from maxing, which eliminates extra pre-rendered frame creation caused by GPU-bound scenarios.
(jorimt: /jor-uhm-tee/)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Author: Blur Busters "G-SYNC 101" Series
Displays: ASUS PG27AQN, LG 48CX VR: Beyond, Quest 3, Reverb G2, Index OS: Windows 11 Pro Case: Fractal Design Torrent PSU: Seasonic PRIME TX-1000 MB: ASUS Z790 Hero CPU: Intel i9-13900k w/Noctua NH-U12A GPU: GIGABYTE RTX 4090 GAMING OC RAM: 32GB G.SKILL Trident Z5 DDR5 6400MHz CL32 SSDs: 2TB WD_BLACK SN850 (OS), 4TB WD_BLACK SN850X (Games) Keyboards: Wooting 60HE, Logitech G915 TKL Mice: Razer Viper Mini SE, Razer Viper 8kHz Sound: Creative Sound Blaster Katana V2 (speakers/amp/DAC), AFUL Performer 8 (IEMs)
Re: NVIDIA Reflex Low Latency - How It Works & Why You Want To Use It
Does anyone know how I can fix Reflex + VSync + ULLM locking frames to 225? I expected it to jump to at least 260 fps when I changed monitors, but it seems to be stuck at 225 from previous 240Hz monitor. I've tried switching each option on/off, but that didn't change anything. Am I forced to play without V-Sync and lock my frames manually now? I quite enjoyed the automatic fps cap before.