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1X 2080Ti vs. 2X 2080Ti vs. 1X TitanXP - P3D V4.3

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I also think the balancing is a key. On my 7900X & 1080TI setup, the CPU is usually at 100% or there, the GPU not so much. 

Perhaps the settings are not balanced or perhaps the OC's of both is not a match, hard to tell.

Edited by Vali

Valentin Rusu

AMD Ryzen 5900x OC, EVGA RTX 3080 Ti FTW3, DDR4 32GB @3200MHz, Samsung 840 PRO Raid for Win 10 Pro, Samsung 960 PR0 512GB NVMe SSD for P3D v4.5

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2 hours ago, w6kd said:

ut an 8-core 9900K just might start to max out the busses with 2X 2080Ti at 8x/8x

Yeah, typically there will be about 10-12% FPS drop (in 3D shooters) going from 2X16 to 2X8 PCIe with SLI ... not sure about NVLink/SLI?

Cheers, Rob.

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22 hours ago, Ray Proudfoot said:

Without wishing to be disrespctful what you have posted above is totally meaningless without knowing your hardware. PLEASE put it in your signature.

Done.

Below are my settings and screenshots in the most demanding situation I could imagine to put my 2080 Ti to the test: DD KSEA, 16L, in the FSLabs A319 at dusk, engines running, all exterior lights on with dynamic ramp lighting also visible. Also have DD Seattle X, ORBX NA PNW, OLC NA lights active as well.

Historical WX:

KSEA 031529Z 22011KT 8SM -RA BKN008 OVC013 

Settings:

45879881971_cff6efcb10_z.jpgCapture by Ben, on Flickr

44966580935_2f951a4d27_z.jpgCapture1 by Ben, on Flickr

44966581775_56d31a37eb_z.jpgCapture2 by Ben, on Flickr

45879884051_17f92298e2_z.jpgCapture3 by Ben, on Flickr

For the sake of this exercise, I turned off VSync/Triple Buffering (always run VSync/Triple Buffering/30hz when flying):

45863276161_09ea7e6dd1_b.jpgPrepar3D Screenshot 2018.11.12 - 23.01.51.69 by Ben, on Flickr

45813903842_9b7106a64d_b.jpgPrepar3D Screenshot 2018.11.12 - 22.58.06.79 by Ben, on Flickr

As you can see, I can maintain over 30fps in this scenario (was fluctuating between 33-38). Now, see what happens when I change the AA to SSAA x 4:

30924173827_ef94342611_b.jpgPrepar3D Screenshot 2018.11.12 - 23.02.14.20 by Ben, on Flickr

30924171787_155a8bde32_b.jpgPrepar3D Screenshot 2018.11.12 - 22.58.55.74 by Ben, on Flickr

As you can see, SSAA can still take a toll on my system when put in an already graphically demanding situation. I can fly with SSAA x4 at daytime, and at night into some airports without dynamically lit ramps and still maintain 30fps, however the combination of  4k, dynamic aircraft lights, weather, and dynamically lit airports can still result in less than 30fps. Overall though, I am happy as that isn't a huge compromise for me, and I can otherwise crank up all my GPU-intensive settings. As I said in my earlier post, I have different graphics settings for different scenarios (Day IFR, Day VFR, Dusk, etc.) and go between them in order to maintain smooth 30fps/30hz.

Ben


P3D 4.3, Windows 10/64 bit, Intel 6700k @ 4.7 air-cooled, NVidia 2080 Ti Founders Edition, ASUS Rog Maximus VIII Ranger, 16GB G.Skill Ripjaws DDR4 @3200, Phanteks Anthoo Pro Series Case, Samsung 950 Pro M.2 500GB, Sandisk 1TB SATA, Seagate 2TB Hybrid Drive, Cooler Master 700W, 40-inch Samsung 4k TV

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16 minutes ago, bbain1187 said:

Done,

Ben

Thanks, much appreciated. Nice machine. 😄


Ray (Cheshire, England).
System: P3D v5.3HF2, Intel i9-13900K, MSI 4090 GAMING X TRIO 24G, Crucial T700 4Tb M.2 SSD, Asus ROG Maximus Z790 Hero, 32Gb Corsair Vengeance DDR5 6000Mhz RAM, Win 11 Pro 64-bit, BenQ PD3200U 32” UHD monitor, Fulcrum One yoke.
Cheadle Hulme Weather

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On 11/6/2018 at 7:23 AM, GSalden said:

The 2080Ti is performing exactly the same as the 2x 1080Ti SLI combo.

I am reaching the same conclusion.  Actually, the 2080Ti seems a bit smoother...but the scenarios that pushed the twin 1080Tis to the brink (e.g. 4xSSAA and heavy wx) are seeing GPU loads within a few percent (usually lower) than the SLI setup.  And now I can use Trueglass and other add-ons that use the P3D PDK without the flashing problems that were present with the SLI setup.

At this point, I don't think the improvements that I'd see with a second 2080Ti would be worth going back to constantly dealing with the SLI hassles.  This card looks to be a pretty optimum match for P3Dv4 and a 4K display.

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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Why do people use SSAA and 4K?  Isn't that complete overkill?  I can still read the full eye chart at my doctor's office and I don't feel there is any difference in everyday use.  Is it just for the shimmering in the distance sometimes?

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4 hours ago, TravelRunner404 said:

Why do people use SSAA and 4K?  Isn't that complete overkill? 

No, not overkill at all.

The need for AA varies with the size of the individual pixels relative to the viewing distance.  When the pixel's size is below the visual acuity threshold--the point where the angular width of an individual pixel is wide enough that your eyes can resolve it separately from its neighbors, then use of AA to smooth the jaggies out is pointless, as you can't see them anyway.  So a small (say 32") 4K monitor viewed at 36" eye-to-screen distance may need no AA at all.  However a 55" 4K monitor at the same viewing distance does need AA, since the pixels on the larger screen are large enough for the eye to resolve individually (and therefore so are the jaggies formed by those individually-visible pixels as well).

I use a 55" 4K display at 39" viewing distance in order to get the panel display close to life-size (the display units on the PMDG 737 are ~85% of life size).  AA makes a noticeable difference with a display of this size at this viewing distance.  If I were to either go down to a 40" display or move back away from the 55" screen, then I may not need AA...but then again I will also have defeated my intended purpose of trying to replicate a near life-size panel at close to the same approximate viewing distance as a real instrument panel.

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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12 hours ago, TravelRunner404 said:

Why do people use SSAA and 4K?  Isn't that complete overkill?  I can still read the full eye chart at my doctor's office and I don't feel there is any difference in everyday use.  Is it just for the shimmering in the distance sometimes?

Yes, the main issue for me is shimmering of Orbx road lights at night. The 4x SSAA virtually eliminates jaggies which is pretty noticeable and impressive on a 4k display even in the daytime. And I sit about 3 feet from my 40 inch display.

Ben 


P3D 4.3, Windows 10/64 bit, Intel 6700k @ 4.7 air-cooled, NVidia 2080 Ti Founders Edition, ASUS Rog Maximus VIII Ranger, 16GB G.Skill Ripjaws DDR4 @3200, Phanteks Anthoo Pro Series Case, Samsung 950 Pro M.2 500GB, Sandisk 1TB SATA, Seagate 2TB Hybrid Drive, Cooler Master 700W, 40-inch Samsung 4k TV

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The shimmering is pretty bad overall and I can see why you’d want to get rid of that. I do notice less without SSAA but personally it’s not worth the performance drop even on my 1080ti but the perfectionist in me does notice it.

Isn’t SSAA the most blunt technique for anti-aliasing? I have read a little bit on it and it seems it’s the most inefficient but in a way that makes it the best? Is it a P3D choice that it only allows MSAA and SSAA and not more of the modern techniques? But I also get the impression modern techniques all have issues right?

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On 11/16/2018 at 12:54 PM, w6kd said:

I am reaching the same conclusion.  Actually, the 2080Ti seems a bit smoother...but the scenarios that pushed the twin 1080Tis to the brink (e.g. 4xSSAA and heavy wx) are seeing GPU loads within a few percent (usually lower) than the SLI setup.  And now I can use Trueglass and other add-ons that use the P3D PDK without the flashing problems that were present with the SLI setup.

At this point, I don't think the improvements that I'd see with a second 2080Ti would be worth going back to constantly dealing with the SLI hassles.  This card looks to be a pretty optimum match for P3Dv4 and a 4K display.

Regards

Thank u for your report.  I would like to ditch my 1080ti SLI setup and go to a single 2080ti.  Do u still consider that a positive upgrade?  I like my SLI but the Realight issues are very annoying.


Matt Wilson

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12 hours ago, mpw8679 said:

Thank u for your report.  I would like to ditch my 1080ti SLI setup and go to a single 2080ti.  Do u still consider that a positive upgrade?  I like my SLI but the Realight issues are very annoying.

It's not a major performance boost over the 2x 1080Ti SLI I had before, but yes, the move away from complexity, lack of compatibility issues with newer PDK-based features like RealLight, TrueGlass, and GSX2, and eliminating the ever-present risk of another batch of potentially buggy drivers that break SLI, all make it a positive move forward.  I've had several drivers along the way that actually caused the SLI options to disappear from the nVidia Control Panel, and a driver rollback did not fix it, forcing a complete system restore from backup to get my SLI config working again.  For the most part, SLI does work, but it's a messy, inefficient and brute-force approach, and it always seems to require serious compromises.  I did SLI with a pair of 980Tis, and then again with a pair of 1080Tis.  I'm finally where I wanted to be w/r/t performance with the single 2080Ti now.

Regards

 

 

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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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16 minutes ago, w6kd said:

It's not a major performance boost over the 2x 1080Ti SLI I had before, but yes, the move away from complexity, lack of compatibility issues with newer PDK-based features like RealLight, TrueGlass, and GSX2, and eliminating the ever-present risk of another batch of potentially buggy drivers that break SLI, all make it a positive move forward.  I've had several drivers along the way that actually caused the SLI options to disappear from the nVidia Control Panel, and a driver rollback did not fix it, forcing a complete system restore from backup to get my SLI config working again.  For the most part, SLI does work, but it's a messy, inefficient and brute-force approach, and it always seems to require serious compromises.  I did SLI with a pair of 980Tis, and then again with a pair of 1080Tis.  I'm finally where I wanted to be w/r/t performance with the single 2080Ti now.

Regards

 

 

Thank u!


Matt Wilson

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So, for those who still run a single 1080Ti in 2k resolution, there is no sense to make a swap to 2080Ti as the performance's increase is negligible. Is that correct? 

 

Thanks

Dmitriy

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On 11/23/2018 at 6:44 PM, w6kd said:

It's not a major performance boost over the 2x 1080Ti SLI I had before, but yes, the move away from complexity, lack of compatibility issues with newer PDK-based features like RealLight, TrueGlass, and GSX2, and eliminating the ever-present risk of another batch of potentially buggy drivers that break SLI, all make it a positive move forward.  I've had several drivers along the way that actually caused the SLI options to disappear from the nVidia Control Panel, and a driver rollback did not fix it, forcing a complete system restore from backup to get my SLI config working again.  For the most part, SLI does work, but it's a messy, inefficient and brute-force approach, and it always seems to require serious compromises.  I did SLI with a pair of 980Tis, and then again with a pair of 1080Tis.  I'm finally where I wanted to be w/r/t performance with the single 2080Ti now.

Regards

 

 

I have 1080 Ti SLI too.  But I do not notice the increased performance. (Compared with one 1080Ti)      What settings did you use to make  SLI add power?

 

 


EVGA 2080 Ti  FTW3 Hybrid , 8700K, 2Tb 970 EVO Plus, 48 Гб HyperX

MSFS 2020 Tech Alpha Insider

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I run a 30Hz 4K TV for a monitor, with VSync.  With the SLI config, increased performance meant holding frame rates at 30 fps in heavy weather and with SSAA in scenarios where the single 1080Ti would hit the wall near 100% GPU utilization and frame rates would drop.

As far as settings, off the top of my head I had SLI enabled in nVidia CP, in P3D 4xSSAA (daytime) DL off or 4xMSAA (nighttime) DL on, unlimited fps, 16x AF, and not much else.  No nVidia Inspector tweaking or other settings.

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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