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MarkSC

A Few Benchmarks for GPU Upgrade and Limited/Unlimited Frames

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I thought I would post some interesting benchmarks.  I decided to upgrade my GTX 760 to a 780.  The 760 is a good card, but I wanted to see what the 780 could do. (For those who don't know, the 760 is roughly equivalent to the 670, so roughly 40%-50% less powerful than the 780 in gaming benchmarks)  

 

I ran some benchmarks with FRAPS.  With 4x MSAA and 4X SGSS, I flew a circuit around Langley with FTX Global installed.  Sliders were set to medium high.  LOD was high.  Shadows were set to medium with cast/receive on for plane, buildings, and terrain.  Weather was partly cloudy.

 

With the 760 and frames limited to 33:

Avg 24

Min 20

Max 28

 

With the 760 and frames set to unlimited:

Avg 23

Min 20

Max 28

 

With the 780 and frames set to 33:

Avg 31

Min 24

Max 33

 

With the 780 and frames set to unlimited:

Avg 40

Min 29

Max 43

 

It seems that P3D scales nicely in line with the specs for the GPU. It also appears that setting the frames to unlimited is worthwhile for the 780 but not the 760 (probably because the slider settings were too high to meet even the 33 target for the 760).  In short, P3D makes nice use of the GPU's power, which is a welcome change from FSX. In addition to having active development from LM, we can look forward to increased performance in the future as GPU technology continues to advance. 

 

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That's good to hear.  I'll my new 780Ti running tomorrow (replacing 570HD) and will be able to see what difference  it makes - thanks!

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Ricka47, I made exactly that upgrade on Monday. I think you will be pleased with the result!

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Just couple observations to add. P3D2 uses multiple cores but it always tends to max out on one core under demanding situations. Let's call this the "pirmary core" of P3D.

 

In my cases I have most of my settings maxed or nearly maxed. Overall I'm getting around 25-35 fps in autogen heavy sceneries like KSFO and KSEA, and well over 35 in autogen-light sceneries over mountains of Iceland. What I have observed are the following:

 

If primary core is not maxed out, GPU always runs on 99%. This mostly happens when there are not many autogens like flying over the bare iceland. In this scenario, limiting fps works very well, if the fps fluctuates say 25-35, limiting it to 30 gives butter smooth performance and there is not net loss of fps. Limiting fps also makes primary core works harder.

 

If primary core is maxed out at 99%, then GPU usage drops, often goes down to like 80%-90% or even lower. In this scenario limiting fps give much worse results. If the fps fluctuates between 25-35, limiting it to 30 you barely get sth higher than 25 and the primary core keeps maxed out.

 

Overall, it seems to me that when primary core is saturated, the CPU couldn't feed GPU enough to make GPU run 100%. When GPU is saturated, then CPU may become relaxed as it has to wait for GPU.

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FlyIce, those are very astute observations.  I agree with much of what you said.  I think there's a pretty complex relationship going on between the CPU and GPU; certain conditions seem to tax one or the other more.  I'm not sure though that I could pin it down as closely, as repetition of the same type of flying would often have slightly different results. 

 

I think the load balancing that exists between the CPU and GPU is highly dependent on both pieces of equipment.  Two users might make the same upgrade from one video card to another, but have different CPU's and thus have quite a bit of difference in how the upgrade might affect them.  I think the load balancing is also going to make definitive benchmarking a pain in the butt.  ^_^
 

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Great work. Thanks a lot for doing this. I am gonna get a 760 because I cant afford the 780.

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The quoted specs show the GTX 760 is two thirds the texture fill rate of the 780, which compares well to the fps results above. Setting the internal frame rate limiter introduces look ahead frames, which has a cost in ultimate fps, but pre-rendered frames improve the smoothness overall.

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The quoted specs show the GTX 760 is two thirds the texture fill rate of the 780, which compares well to the fps results above. Setting the internal frame rate limiter introduces look ahead frames, which has a cost in ultimate fps, but pre-rendered frames improve the smoothness overall.

 

 

Thanks, Steve.  Can we look forward to the new version of Ideal Flight for P3D?

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Yea I mean the 780 would be ideal, but its way out of my

*budget was the last word to that last post

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I'm running P3D w/FTX Global with high shadows with all features ticked and dense autogen with everything else maxxed.

 

40-65 FPS with unlimited Vsync and Triple Buff fullscreen

 

I don't even bother with an FPS counter anymore because I simply don't need it I'm too busy enjoying the flights and fluid movement.

 

Specs are in the sig

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To some extent I think it comes down to where you are flying and in what aircraft. I can get over 50+ fps in some areas with everything cranked up, but slow down to 25 or so in areas where dense cities are present. The choice of plane matters too. The A36 that a lot of people like as the default is not one of the best planes in frame rate terms.

 

But blueshark747 also makes a good point. Turning of the frame counter is often a good thing, because it allows you to just enjoy yourself rather than testing and fretting all the time!

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Ricka47, I made exactly that upgrade on Monday. I think you will be pleased with the result!

That's good to hear - thanks!

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Thanks, Steve.  Can we look forward to the new version of Ideal Flight for P3D?

Yes, thank you Marc! IF10 version[sf] is out shortly (before Christmas) then the proper P3D version comes as soon as possible after.

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I have a thread in the screenshot forums that might be of some interest: http://forum.avsim.net/topic/428296-prepar3d-v2-with-ftx-global/

 

My GPU is EGVA's GeForce GTX 780 SC w/ ACX Cooler, which is about 9% faster than the standard GTX 780 (and is quieter and runs cooler), and actually scores higher than a standard Titan in some benchmark tests.  I've also posted screenshots of for all 5 P3D display pages, so you can see exactly what my settings are .

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I have a thread in the screenshot forums that might be of some interest: http://forum.avsim.net/topic/428296-prepar3d-v2-with-ftx-global/

 

My GPU is EGVA's GeForce GTX 780 SC w/ ACX Cooler, which is about 9% faster than the standard GTX 780 (and is quieter and runs cooler), and actually scores higher than a standard Titan in some benchmark tests. I've also posted screenshots of for all 5 P3D display pages, so you can see exactly what my settings are .

I should have mentioned that that is the same card I bought for the benchmarks above.

Great! I think Ideal Flight would be a nice front end for P3D. Can't wait to see it.

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I thought I would post some interesting benchmarks.  I decided to upgrade my GTX 760 to a 780.  The 760 is a good card, but I wanted to see what the 780 could do. (For those who don't know, the 760 is roughly equivalent to the 670, so roughly 40%-50% less powerful than the 780 in gaming benchmarks)  

 

I ran some benchmarks with FRAPS.  With 4x MSAA and 4X SGSS, I flew a circuit around Langley with FTX Global installed.  Sliders were set to medium high.  LOD was high.  Shadows were set to medium with cast/receive on for plane, buildings, and terrain.  Weather was partly cloudy.

 

With the 760 and frames limited to 33:

Avg 24

Min 20

Max 28

 

With the 760 and frames set to unlimited:

Avg 23

Min 20

Max 28

 

With the 780 and frames set to 33:

Avg 31

Min 24

Max 33

 

With the 780 and frames set to unlimited:

Avg 40

Min 29

Max 43

 

It seems that P3D scales nicely in line with the specs for the GPU. It also appears that setting the frames to unlimited is worthwhile for the 780 but not the 760 (probably because the slider settings were too high to meet even the 33 target for the 760).  In short, P3D makes nice use of the GPU's power, which is a welcome change from FSX. In addition to having active development from LM, we can look forward to increased performance in the future as GPU technology continues to advance.

What about textures blurries?

I have GTX 560Ti and I'm considering to buy 780 (Asus probably). I didn't buy FTX Global yet because:

-fresh P3D installation - textures are sharp even with 1.5 Ma speed

-Iceland demo installed - ground textures load too slow, many blurries, worse than FSX - EVEN OUTSIDE ICELAND!

-demo uninstalled - all back to normal

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try to add affinitymask = 14 to the cfg file. That completely fixed my blurry texture problem. I too have FTXG + Iceland installed.

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Question for you guys; it seems to me if you want better fps with v2 than a video card upgrade is a must and not so much the CPU, am I correct?  I'm currently running v1.4 and v2 on my i7-2600k with a gtx680, on v1.4 I get amazing fps but in v2 I take a hit with the clouds. Will I see a difference if I just upgrade just my video card to say the 780 or do I need to upgrade my entire system?

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I think you only need a faster GPU like 780. I'm still using i5-2500k which runs great at 4.9GHz overclocked, can't see a reason to upgrade it at all, unless I want to go SLI in the future then I have to buy a new SLI motherboard which unfortunately will mandate a new CPU. I upgraded from 580 to 780ti and it helps a lot if you want those new features like shadows etc.

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To some extent I think it comes down to where you are flying and in what aircraft. I can get over 50+ fps in some areas with everything cranked up, but slow down to 25 or so in areas where dense cities are present. The choice of plane matters too. The A36 that a lot of people like as the default is not one of the best planes in frame rate terms.

 

But blueshark747 also makes a good point. Turning of the frame counter is often a good thing, because it allows you to just enjoy yourself rather than testing and fretting all the time!

 

Im all about flying low and enjoying scenery was never interested in addon aircraft Im satisfied with default ones for now.

 

Now I can put some nice music on and fly around with great FPS and no stutters and take screenshots of scenery and not worry about anything else..thats what its all about for me.

 

P3dv2 is such a breath of fresh air

 

 

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No blurries at all. I should add to the benchmarks above that they were with vsync and triple buffering. Triple buffering really helps with smoothness, as it adds a 3 frame buffer that the GPU can call on. I didn't notice any stutters in my test flights.

 

I've read probably every review written about Nvidia cards, so I can save you some work. A 780 superclocked model equals or surpasses the Titan for gaming at a nice cost savings. You do, however, give up 3 GB of VRAM, so the Titan would be a better choice for multi monitor at high resolutions (or if you want to mine Bitcoins!) The 780ti is the best choice of all if you have some cash, but it, too, is limited to 3 GB VRAM like the 780 (there were rumors that EVGA is planning to release a 6GB version, but they have denied it).

 

The 770 is an intriguing choice. You lose about 20 percent performance compared to the 780, but save $100 and get an extra 1 GB VRAM. I chose the 780 in my case because I am running only one monitor and, so far, have not seen VRAM usage over 2 GB.

 

I highly recommend the 770, 780 or 780ti, but they are not a must by any means. P3D scales nicely, and if you're willing to lower slider settings, you can get good performance with just about any DX11 card. Like most modern games, the CPU is secondary. No reason to waste time and energy on extreme overclocks.

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Thanks again Mark.  No way I can afford a 780 or 770, so my next logical choice is the 760.  The only thing I am curious about is how p3d would benefit from the 760 as opposed to the 660.  The price difference is only $50 however

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Thanks again Mark. No way I can afford a 780 or 770, so my next logical choice is the 760. The only thing I am curious about is how p3d would benefit from the 760 as opposed to the 660. The price difference is only $50 however

760 is much better than the 660. A 760 is more like the 660ti. It's not a bad card at all. You can run at mid to mid-high sliders with good frame rates.

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