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John_Cillis

Tried a tip today, and it worked

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This has probably been discussed before but I wanted to post here in case this has not been mentioned here.  I was reading an old Avsim thread about adjusting the CUDA compute setting in Nvidia inspector to improve P3D performance.  I use photo scenery and I have noticed stutters with it sometimes.  No blurries, just the odd stutter like pauses right in the approach, which kind of take away the fun. 

I cannot explain the technical details behind this for brevity.  My Nvidia Inspector I used to have until today did not have an option to change the CUDA setting.  But I found this online article which discusses it and points to versions of Nvidia inspector that allow the setting to be changed.   Since changing the settings I have seen much more fluidity in P3D4.5 and Xplane11 as well.  Not a placebo effect, just a change for the better though it cannot be measured by fps alone.  Here is a link to the discussion, which has links to the updated Nvidia Inspector...

 

John

https://www.reddit.com/r/nvidia/comments/aco4ks/how_to_turn_off_nvidias_force_p2_power_state/

 

Edited by John_Cillis

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Thanks for that tip. I'll try it later today.

 


Jude Bradley
Beech Baron: Uh, Tower, verify you want me to taxi in front of the 747?
ATC: Yeah, it's OK. He's not hungry.

X-Plane 11 X-Plane 12 and MSFS2020  🙂

System specs: Windows 11  Pro 64-bit, Ubuntu Linux 20.04 i9-9900KF  Gigabyte Z390 RTX-3070-Ti , 32GB RAM  1X 2TB M2 for X-Plane 12,  1x256GB SSD for OS. 1TB drive MSFS2020

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I've definitely more fps on X-Plane, now hitting 40fps with the Zibo 737 on cruise. Before, I was getting about 30ish. 

Bear in mind this is also with Skymaxx pro.

Edited by Jude Bradley

Jude Bradley
Beech Baron: Uh, Tower, verify you want me to taxi in front of the 747?
ATC: Yeah, it's OK. He's not hungry.

X-Plane 11 X-Plane 12 and MSFS2020  🙂

System specs: Windows 11  Pro 64-bit, Ubuntu Linux 20.04 i9-9900KF  Gigabyte Z390 RTX-3070-Ti , 32GB RAM  1X 2TB M2 for X-Plane 12,  1x256GB SSD for OS. 1TB drive MSFS2020

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9 hours ago, John_Cillis said:

This has probably been discussed before but I wanted to post here in case this has not been mentioned here.  I was reading an old Avsim thread about adjusting the CUDA compute setting in Nvidia inspector to improve P3D performance.  I use photo scenery and I have noticed stutters with it sometimes.  No blurries, just the odd stutter like pauses right in the approach, which kind of take away the fun. 

I cannot explain the technical details behind this for brevity.  My Nvidia Inspector I used to have until today did not have an option to change the CUDA setting.  But I found this online article which discusses it and points to versions of Nvidia inspector that allow the setting to be changed.   Since changing the settings I have seen much more fluidity in P3D4.5 and Xplane11 as well.  Not a placebo effect, just a change for the better though it cannot be measured by fps alone.  Here is a link to the discussion, which has links to the updated Nvidia Inspector...

 

John

https://www.reddit.com/r/nvidia/comments/aco4ks/how_to_turn_off_nvidias_force_p2_power_state/

 

May I ask if it necessary to create a .bat file as suggested in the above link, or did you simply change the CUDA setting in Nvidia Inspector?

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In nVidia parlance, a "compute" workload is a non-graphics workload, such as mining or folding applications.  Flight sims are definitely imposing a graphics workload, which shifts the GPU into the P0 state, not the P2 state.

That said, I'm highly sceptical that this actually works as suggested here.  I played with this on a 1080Ti some time ago, and could not document any improvement at all.

Regards

 

 


Bob Scott | President and CEO, AVSIM Inc
ATP Gulfstream II-III-IV-V

System1 (P3Dv5/v4): i9-13900KS @ 6.0GHz, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090
Samsung 55" JS8500 4K TV@30Hz,
3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU, 1.2Gbps internet
Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro
PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box

Sys2 (MSFS/XPlane): i9-10900K @ 5.1GHz, 32GB 3600/15, nVidia RTX4090FE, Alienware AW3821DW 38" 21:9 GSync, EVGA 1000P2
Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, 2x TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case

Portable Sys3 (P3Dv4/FSX/DCS): i9-9900K @ 5.0 Ghz, Noctua NH-D15, 32GB 3200/16, EVGA RTX3090, Dell S2417DG 24" GSync
Corsair RM850x PSU, TM TCA Officer Pack, Saitek combat pedals, TM Warthog HOTAS, Coolermaster HAF XB case

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2 hours ago, w6kd said:

In nVidia parlance, a "compute" workload is a non-graphics workload, such as mining or folding applications.  Flight sims are definitely imposing a graphics workload, which shifts the GPU into the P0 state, not the P2 state.

That said, I'm highly sceptical that this actually works as suggested here.  I played with this on a 1080Ti some time ago, and could not document any improvement at all.

Allowing the GPU to run in the P2 state can also effect rendering (lower memory clock on most nVidia later gen cards).  Do we know how much rendering work LM has moved over to the GPU?  I experience snappier panning with my 1080 when the P2 state is disabled (YMMV, of course).  At any rate, disabling the P2 state is easy to do with later versions of nVidia Inspector... and costs nothing.

Cheers,

Greg

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