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[Eteknix] Pascal GTX 1080 Async Compute Explored - Page 20  

post #191 of 200
http://www.overclock.net/t/1597089/gsync-100hz-limit-frames-to-99-so-vsync-never-kicks-on/10#post_25094298

Post 15
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post #192 of 200
Quote:
Originally Posted by atomicmew View Post

WTH how can nvidia be over 2.5x better?
OpenGL
post #193 of 200
Quote:
Originally Posted by TranquilTempest View Post

Linus has some very questionable testing methodology with regards to latency, it would be unwise to draw any conclusions from it. There are really three main problems, the first is that the manual frame counting method is very slow, so he can't really get enough samples to account for the random timing of the input event. The second issue is that it looks like he's just letting the games run uncapped and letting the natural bottlenecks determine the framerate, which may be fluctuating or bottlenecked in a different part of the render chain, this is the reason you need to throw everything there out the window, he's comparing gpu limited scenarios to cpu limited scenarios to display limited scenarios, and not in a consistent way. To specifically isolate freesync vs g-sync you need to use an in game framerate cap with super consistent render times. (like fps_max in CS:GO) This way you know you're measuring the display interface, and not the GPU or game engine. (Third party and driver based framerate caps add input lag, and importantly, they add different amounts of input lag depending on where they limit framerate)

Then there's the fact they're comparing different monitors, which may very well have unaccounted for differences.

To get any kind of confidence in their results, they'd need to benchmark the latency of both systems using the same monitor with vsync off(preferably a CRT), then get baseline vsync off fixed refresh rate input lag numbers for each display(to make sure they're the same distance from the CRT in that scenario), and then finally test gsync vs freesync.

Also, their latency numbers just look high in general, they should be about half what was graphed, given the stated scenarios.

I agree that Linus either has very questionable testing methodology or simply is not giving enough information to understand his tests.
I have seen various of his videos and most of them I would not trust as benchmarks of performance.

Now I understand that Youtube videos have a certain format you need to keep in order to attract a wide variety of crowds (and since that is your revenue, its understandable), but its is not a well performed review, and people will take his testing at face value due to follower numbers spreading miss information all along.

One example was when linus compared Windows 7 to windows 8 to windows 10 and claimed that boot times for Windows 7 were much longer than in windows 10.
In my case, my windows 7 booted faster than any of the windows he was testing, so... either its wrong, or I am missing information.

In general, that also means that the tests are not possible to replicate to see if the reviewer is being honest at all or simply its a paid commercial.
When that happens, I stop using that information as valid.
post #194 of 200
Quote:
Originally Posted by Catspaw View Post

I agree that Linus either has very questionable testing methodology or simply is not giving enough information to understand his tests.
I have seen various of his videos and most of them I would not trust as benchmarks of performance.

Now I understand that Youtube videos have a certain format you need to keep in order to attract a wide variety of crowds (and since that is your revenue, its understandable), but its is not a well performed review, and people will take his testing at face value due to follower numbers spreading miss information all along.

One example was when linus compared Windows 7 to windows 8 to windows 10 and claimed that boot times for Windows 7 were much longer than in windows 10.
In my case, my windows 7 booted faster than any of the windows he was testing, so... either its wrong, or I am missing information.

In general, that also means that the tests are not possible to replicate to see if the reviewer is being honest at all or simply its a paid commercial.
When that happens, I stop using that information as valid.

Under the same circumstances, Windows 10 does boot almost twice as fast as Windows 7, no way around it, because W10 OS is never truly shut down like W7.
Interesting to see.
Edited by Dargonplay - 6/15/16 at 7:34am
post #195 of 200

I came into this thread once again because of the title GTX1080 Async Explored and potentially some new information. And then from post 86 - 194 nothing about GTX1080 Async at all.

Only talk of red vs green Freesync Vs Gsync.

 

I'm still on the bandwagon that Async is a great technology that has not been matured with programmers to "readily" use it. From 2014 on, Star Swarm and Ashes (I own both) which can be thought of as Benches. Color me impressed when it makes a huge difference in a AAA game.

 

As a UE4 developer I'm trying to get my head around which program functions and eye candy in today's games would make this massive difference that's been prophesized. For Rise of the Tomb Raider for example I could see the snow in the opening scene being optimized from the particle effects using Async as an example. I could see bullet / smoke effects etc in shooters.

 

Lighting is a big one of course that is Everything in regards to realism. I'm just surprised by the lack of other demo's and use of Async that can really show it's power.


Edited by Ghoxt - 6/15/16 at 7:36am
post #196 of 200
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post #197 of 200
Quote:
Originally Posted by Buris View Post
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Sound like the subject has run it's course.

post #198 of 200
Quote:
Originally Posted by ToTheSun! View Post

As irony would have it, apparently it is you who does not understand how Fast Sync works.
What about puns? Do they have anything pertaining to the situation?
Quote:
Digital Foundry: During the beta phase you moved from adaptive to a straight v-sync solution on the console versions. What was your thinking there?

Jean Geffroy: We did improve quite a few things between the closed and open beta, including our v-sync solution as you noticed. We changed this to instead use a triple-buffered solution where we always present the last image that's been rendered by the GPU with minimum latency. This is very similar to Fast Sync that Nvidia recently introduced on PC.
[Source]
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post #199 of 200
Quote:
Originally Posted by mtcn77 View Post

Quote:
Originally Posted by ToTheSun! View Post

As irony would have it, apparently it is you who does not understand how Fast Sync works.
What about puns? Do they have anything pertaining to the situation?
Quote:
Digital Foundry: During the beta phase you moved from adaptive to a straight v-sync solution on the console versions. What was your thinking there?

Jean Geffroy: We did improve quite a few things between the closed and open beta, including our v-sync solution as you noticed. We changed this to instead use a triple-buffered solution where we always present the last image that's been rendered by the GPU with minimum latency. This is very similar to Fast Sync that Nvidia recently introduced on PC.
[Source]
I'm not sure what you mean to convey with that quote. Are you implying Fast Sync is triple buffered? Because it isn't, as per Nvidia themselves.
    
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post #200 of 200
By the time DX12 and the likes will be really relevant Volta will be out. We have long way till DX12 will be important. Also we don't really know if Vulkan will ever be significant for PC games until devs decide if they will use it for AAA games on PC or they will focus using it on mobile. I guess Vulkan will lose to DX12 on PC but that is my own personal guess. Windows 10 growth plays a very important role in this. We have to wait 2 years on average to see.
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