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Qun Mang
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Reged: 12/12/03
Posts: 634
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Re: Opengl vs D3D
04/07/17 03:46 PM


> > My system apparently favors D3D (Intel Core i5-4570, GTX 970, Win10 x64):
> >
> > mame64 pacman -nothrottle -str 30 -video d3d
> > Average speed: 4430.15% (29 seconds)
> >
> > mame64 pacman -nothrottle -str 30 -video opengl
> > Average speed: 197.96% (29 seconds)
> >
> > mame64 pacman -nothrottle -str 30 -video bgfx
> > Average speed: 573.56% (29 seconds)
> >
> > Ran twice with similar results. I remember nvidia GPUs once favored OpenGL, but I
> > guess that was awhile ago.
>
> I'm going to guess that in your graphics driver you have driver some internal setting
> set to forcibly sync video to signal and is not allowing you to unthrottle, even if
> MAME allows it. Check your settings via your card's desktop manager software and/or
> make sure vsync is off in MAME before retesting.

That would do it. I was going to reply something about the speed being 198%, but then I remembered my monitor refresh is set at 120Hz.

Update:
mame64 pacman -nothrottle -str 30 -video opengl
Average speed: 3713.51% (29 seconds)

D3D still a little faster.







Entire thread
Subject Posted by Posted on
* Opengl vs D3D Mariosgeorgiou 04/06/17 11:43 PM
. * Re: Opengl vs D3D Mariosgeorgiou  04/07/17 09:37 AM
. * Re: Opengl vs D3D Mariosgeorgiou  04/07/17 09:38 AM
. * Re: Opengl vs D3D Mariosgeorgiou  04/07/17 09:41 AM
. * Re: Opengl vs D3D TafoidAdministrator  04/06/17 11:51 PM
. * Re: Opengl vs D3D Qun Mang  04/07/17 05:49 AM
. * Re: Opengl vs D3D TafoidAdministrator  04/07/17 12:27 PM
. * Re: Opengl vs D3D Qun Mang  04/07/17 03:46 PM
. * Re: Opengl vs D3D URherenowModerator  04/07/17 04:14 AM
. * Re: Opengl vs D3D apeman  04/08/17 08:19 PM
. * Re: Opengl vs D3D Qun Mang  04/08/17 10:52 PM
. * Re: Opengl vs D3D apeman  04/09/17 01:29 AM
. * Re: Opengl vs D3D TafoidAdministrator  04/07/17 12:26 PM
. * Re: Opengl vs D3D krick  04/07/17 07:51 AM
. * Re: Opengl vs D3D (EDIT) URherenowModerator  04/08/17 10:50 AM

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