i just typed a novell in another thread,so i am just gonna open this topic and edit post later.
there is not a single topic in online world about cpu bottleneck and input lag
and how its affect rendering pipeline, buffers , and all that jazz.
how can you even test that and how can you measure that..etc
my personal opinion is that,
there will be 0 lag..
completely opposite from Gpu bottleneck
Jorimt can you test CPU bottleneck with G-Freesync
Re: Jorimt can you test CPU bottleneck with G-Freesync
Both CPU and GPU bottlenecks originate from the system, thus VRR has no effect on either, since it just syncs whatever is output by the system.
As for CPU vs. GPU bottlenecks, a CPU bottleneck, be it cause by limited system and/or game engine performance (and sometimes both simultaneously), will typically result in a lower achievable average framerate and low GPU utilization.
I.E. generally, the only way CPU utilization can directly affect latency is through frametime; the lower the achievable frametime/the higher the average framerate, the less CPU-side latency there will be.
(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: Jorimt can you test CPU bottleneck with G-Freesync
as usual jorimt doing his thingyjorimt wrote: ↑15 Jul 2022, 13:25Both CPU and GPU bottlenecks originate from the system, thus VRR has no effect on either, since it just syncs whatever is output by the system.
As for CPU vs. GPU bottlenecks, a CPU bottleneck, be it cause by limited system and/or game engine performance (and sometimes both simultaneously), will typically result in a lower achievable average framerate and low GPU utilization.
I.E. generally, the only way CPU utilization can directly affect latency is through frametime; the lower the achievable frametime/the higher the average framerate, the less CPU-side latency there will be.
yes i was aware of that,but that was not the point of my post..i am pretty certain..bcs i alredy knew that..
so maybe i was poorly formating the question..i am not sure.
funny thing..if you for example select in nvcp normal instead max performance under power menagment settings
you can squeeze 20-30 more fps in cpu bound scenarios..
honestly idk why that is a thing,maybe bcs they are more on level playfields cpu=gpu vs cpu-+gpu(higher clocks)
i cant remeber what i originaly had in mind with this post..sure i will remember and post again.
Re: Jorimt can you test CPU bottleneck with G-Freesync
Right, the NVCP perf setting you referenced directly affects GPU, not CPU clocks, so if you were experiencing that, the GPU must have been running at a very low clock to hold back average framerate like that.Crazyness wrote: ↑06 Sep 2022, 15:49funny thing..if you for example select in nvcp normal instead max performance under power menagment settings
you can squeeze 20-30 more fps in cpu bound scenarios..
honestly idk why that is a thing,maybe bcs they are more on level playfields cpu=gpu vs cpu-+gpu(higher clocks)
I've only really seen anything like that in legacy 3D (think FFXIII-era) games that barely push modern GPUs.
Could be system and/or game-specific in your particular case, hard to say.
Sure, feel free to update this thread if/when you do remember.
(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)