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Anybody out there running a 2080 @ 4K?

Gents, thankyou for the excellent advice as always. And very nice and logically put, Bob. That helped clarify things a lot, and good to know from someone who has had some experience with 2x980tis. Thanks again guys, you have been very helpful! Still haven't quite decided as yet 🙂 Wish the bank balance would grow a bit!

I'd be very interested to know your settings, Vincent. I am toying with the idea of a 2080. How is it with shadow settings, cloud draw at 150 miles, rain, etc.? What AA? Could you try cranking them up and letting us know some results? 😛 The 2080 is far more reasonably priced.

I have the same problem

And I guess you didn't have CDU scratchpad enabled? As in your P press wasn't going to the CDU?

Thank-you very much Rob for testing and letting us know your results 🙂

Will try and find you a way to! 🙂

Is SSAA enabled with that DL?

Thanks for the answers chaps! Good idea - I will check how much VRAM is used on my next flight and report back. I am right in thinking SLI still limits VRAM to the 6GB of the 980ti, it does not double right? Cheers, Rudy

It is interesting to see that you both have found ISA deviation has had basically no effect on the aircraft's fuel burn. I primarily fly with the RR 744 - the profile for PFPX was created by Doug Snow with accurate data from his airline's performance dispatch system. I get extremely precise results as long as I cancel out any corrections for ISA deviation that are applied by PFPX. i.e. negate the 3% bias per 10 degrees +/- ISA (and of course corrent for the PMDG's ISA 0 baseline bias, which is negative bias). We seem to agree that something in the P3D and/or PMDG causes the aircraft not to respond in fuel burn to different ISA deviations? A word from someone on the dev team or who really knows about how the fuel burn modelling works might clear it up 🙂

I have checked my controller calibration - it is fine, and flight controls show centred when they should. Trust me, I have done lots of flights with the 747 too, and I have never seen this before two flights recently. The common factor - both were a high TOW with fuel in stab tank. I haven't had this happen on my last two flights (SIN-SYD, SYD-SIN) with lower weights. I have only had the problem twice on the SIN-LHR and LHR-SIN flights. Look I'll do some testing on my end to see if I can get it to reproduce...

Hi Frank, ASP4 with ASCA cloudset - have textures turned down to 512x512 DXT. I think the 4K is what might really stress out the GPU in these situations

Hello chaps, Looking for a spot of advice here, and I know there is some good knowledge around here. Bascially I am running P3D v4 in 4K with my 980ti (other specs: 6700K @ 4.5GHz, 16GB DDR4 @ 3000MHz). Performance is usually okay, but what really seems to get me hammered is any sort of heavy cloudy conditions somewhere a little bit taxing (FT YSSY for example). I do turn cloud draw distance down tith ActiveSky to about 80, shadows down, cloud layers to 1 (yes, 1!) but overall it doesn't seem to help that much. Only use MSAA. Basically, I think the weakest part of the system for 4K at the moment is the graphics card, so my choices are: 1) Get another 980ti reasonably cheaply and run SLI - I am hoping this will improve things in clouds etc. 2) Get a 1080ti and maybe SLI at a later date. I am not convinced one 1080ti is going to help that much in these situations? 3) Get a 2080ti once we've seen a bit of evidence they're any good with P3D. Obviously, I am leaning toward the 980ti SLI for cost. Will it help me? Any other advice is also welcome. I am assuming my CPU is still okay, and not a lot of benefit in upgrading that? I am not temp limited unfortunately, no matter how much voltage you throw at it (up to about 1.4V, it does not enjoy being stable above 4.5-4.6GHz). Thanks for any advice you guys can offer 🙂 Cheers, Rudy

This is what I’m saying. I’ll trial a takeoff from an old flight plan from before the update to make sure - but I have used very similar weights in the past. CG I couldn’t tell you - I let your FMC work it’s stuff and make sure nothing is highlighted when inputting load. I am going by the FMC basically - if it loads the weight and fuel I ask it to, and the CG isn’t highlighted, and I use the FMC stab trim and VR and thrust - it shouldn’t pitch before VR at heavy weights with an assumed temp, right? I’ve also checked the STAT page and my flight controls show centred. I notice the plane now loads fuel in the stab tank at lower fuel weights than it used to, has this changed?

Hi Michael, This is with the 747-400. On these occasions, TOPCAT VR was within 1 or 2 knots of the FMC calculation. Basically, since the update, it seems to want to pitch up before VR? This has never happened to me once before the update (~100 flights). Which way around is it best to load the 747-400? Payload first in the FMC, or fuel first? I always let the FMC load the aircraft as it sees fit. Cheers,