Ray Proudfoot

4K over 1920*1080 - what is the penalty

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Currently I'm running P3D v3.4 and with the hardware listed in my sig. performance is excellent at all airports including complex 3rd party ones.

I'm considering P3D v4 and would like to switch to 4K - 3840*2160 but I'm guessing performance would take a sizeable hit. Has anyone compared fps at both resolutions with all other factors unchanged?

Does 4K really require a 1080i or could I get away with a 1080? Thanks for all replies.

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Well going from 1080p to 4k, you have one thing in your favor here. You will be able to radically cut down AA. On 1080 you need a fair amount to smooth things out. At 4K you can half it of even more and still obtain razor clarity. 

In certain situations given what I said you could see an increase in FPS depending on weather and how many clouds are being rendered. If you have a 1080 it should be enough, however if you plan on keeping AA high or running UHD Clouds, or Texture_Size_Exp=9/10 you will consume all the VRAM on the 1080 and would require the Ti.

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Thanks Angelo. Given the extreme resolution I would probably drop AA. My FS PC is off at the moment so I can't check.

The 1080 copes well with most situations but where there is a lot of cloud and in multiple layers I can see the impact and there is a drop in fps down to 14-20.

Are you able to test both resolutions with identical weather and scenery settings and give me an idea of fps? AA off for 4K but on for 1920 please.

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Also keep in mind that the larger the monitor the more AA you will need.  I run a 40" at 4k an even 8x MSAA can have a fair amount of shimmering in the distance.  It gradually decreases as I fly closer and looks great on the ground though.  I'm on a 1060 so I'm also looking at upgrading to a TI in the future.  I may wait until the next round of cards is released for a price drop since it's a high cost to just to be able to run SSAA and reduce shimmering.

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@sfgiants13, the monitor (or more likely, TV) will be 40" max and I'll be sitting around 3ft from it. I don't anticipate using AA because fps is more important than shimmering / jagged edges.

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Ray,

I have a Samsung 43 in 4K monitor and just love it......and it is exactly 3 feet away. 

The added detail, especially when flying a PMDG airliner is spectacular.

You will not be disappointed!

However, be sure and get a monitor that supports 30Hz, there are several Samsung models that do.

Bill

 

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Your 1080 will be under heavy fire with dynamic Lights switched on.
Seriously forget clouds and the AA penalty they bring. DL will be your enemy no1 in most cases. Some airports/aircraft are not matched well at all with Dynamic Lighting turned on.
I have no problems maxing out my 1080ti during flights in dawn/dusk and night.

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What is the penalty? Like you wouldn't believe. 4 times more pixels to move around the screen. 4K needs a 1080ti no less. I have gone from a 1080 to a ti and it makes a lot of difference.

I have a BenQ 32in at 30hz with a 1080ti.

Cheers,

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Bill, thanks for the tip.

SAS443, I don't fly at night so DL won't be an issue.

Pierre, I would really appreciate some hard numbers.

Can anyone temporarily switch their display to 1920*1080 and run a test then do the same at native 4K? Honestly, that would be far more helpful than subjective posts.

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Ray,

8-10 fps difference using exactly the same settings. I7 8700K, GTX 1080Ti, 43" LG Monitor. 

Mike

 

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Ray,

4k is a different ball game. It is not like you're looking for more FPS as in fs9 and/or fsx. What you are looking for here is Smoothness, fluidity. That can not be expressed in numbers yet (although there are means of testing for dropped frames which might influence smoothness but I won't go into that here).

Again, in as far as 4k is concerned, the recipe is quite simple: a 30hz monitor and the most powerful video card available are the main ingredients.

Cheers,

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Hello,

My experience switching from FullHD with Nvidia 780Ti p3dv4 on decent visual settings to 4K resulted in decision to buy 1080Ti, it resulted in lowering AA setting, and increasing almost to maximum graphic settings, using almost all ORBX addons,Act.Sky,online flying and complex airliners. I’m very happy with performance ranging from really smooth 20ties fps at “heavy” scenery areas and heavy weather to 40-60 for the rest of the situations. My CPU is 4770K overclocked to 4,5GHz.RAM8GB and using only SSDs.(using samsung 100Hz QLED 65 inch TV with refresh rate locked to 60, and p3dv4 internal fps limiter and nvidia control panel fast sync option)

with best regards,

Rado

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1 hour ago, Ray Proudfoot said:

Bill, thanks for the tip.

SAS443, I don't fly at night so DL won't be an issue.

Pierre, I would really appreciate some hard numbers.

Can anyone temporarily switch their display to 1920*1080 and run a test then do the same at native 4K? Honestly, that would be far more helpful than subjective posts.

Ray you can run a test yourself. Just setup x4 DSR (4x1080 = 4K) in NCP and select the virtual 4K in the sim. That's pretty much how your system will handle real 4K. Play with AA settings and see their effect.

gb.

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50 minutes ago, gboz said:

Ray you can run a test yourself. Just setup x4 DSR (4x1080 = 4K) in NCP and select the virtual 4K in the sim. That's pretty much how your system will handle real 4K. Play with AA settings and see their effect.

gb.

"...virtual 4K in the sim"

What does that mean. I've never seen a setting for virtual 4k in P3D. I thought 4K=2x1080?

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2 hours ago, mikealpha said:

Ray,

8-10 fps difference using exactly the same settings. I7 8700K, GTX 1080Ti, 43" LG Monitor. 

Mike

That's very helpful, thanks Mike. My worst fps hit is heavy cloud inbound to Aerosoft Xtended EGLL where the fps drops to high teens. That would drop to 10 or less so not flyable really.

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