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 Gameguru Mania News - Aug,15 2014 -  
DirectX 12 Promises Significant Performance Gains - tech
(hx) 06:22 AM CEST - Aug,15 2014 - Post a comment / read (9)
Microsoft has been touting the improvements which DirectX 12 will bring to the table. Listening to the claims of its creator is one thing, but seeing real-world tests on actual hardware is another. At SIGGRAPH 2014, Intel has demonstrated the performance and power benefits of DirectX 12 on a Surface Pro 3 (which uses the company's HD4400 graphics chip.) The demonstration renders an asteroid field with 50,000 unique asteroids in it which equates to 50,000 draws per frame. Each asteroid is unique through procedurally-generating a combination of vertices, textures, and constants. To show the improvements, the demo is able to switch between DirectX 11 and 12 at the press of a button whilst locking the frame rate to keep the GPU workload constant.

When rendering exactly the same content, DirectX 12's power consumption was impressively over 50% less than its predecessor. A key improvement in DirectX 12 is its ability to intuitively share the workload across multiple cores, and the performance gains we are seeing here show this in action. Reduced power consumption doesn't, of course, directly relate to increased performance. It does however lead to a much cooler device which as a side-effect allows the GPU to run hotter and faster. In a blog post on MSDN, Microsoft claims: "In some cases, DirectX 12 can take a game that’s otherwise unplayable on DirectX 11 without even increasing the power your device consumes!" Intel demonstrated this through unlocking the frame rate in their demo to show a 50% increase in FPS (frames per second) using DirectX 12 - despite not drawing any extra power. Whilst not directly comparable, it could show promise to boosting the Xbox One's prowess.

last 10 comments:
Csimbi(07:43 AM CEST - Aug,15 2014 )
quote:
DirectX 12 Promises Significant Performance Gains
Heard that before, but as a matter of fact, it became slower and slower.
Just check a game with both DX9 and DX 10 support and set the same level of detail.
DX9 will be super-fast compared to DX 10.

tiamat(01:22 PM CEST - Aug,15 2014 )
It is almost certainly down the the bloat. DX was originally intended to be very bare-bones library of functions giving you almost direct access to the GPU extensions but with each revision they have tacked on more and more so you are further away from accessing those extensions directly.

Csimbi(02:07 PM CEST - Aug,15 2014 )
OpenGL was always faster (though harder to code). I wonder if the new revision they just released would be more convincing for the programmers.

V-ampire(02:31 PM CEST - Aug,15 2014 )
Really nice informed comments.

But after all this is a site for gamers, not opengl/directx programmers, so it is understandable.

It's still funny though.

El_Coyote(04:34 PM CEST - Aug,15 2014 )
tiamat> It is almost certainly down the the bloat. DX was originally intended to be very bare-bones library of functions giving you almost direct access to the GPU extensions but with each revision they have tacked on more and more so you are further away from accessing those extensions directly.

Keyboard warriors to the rescue.
A lot of the bloat you're referring to is technologies that didn't exist until they were implemented into direct x.
The speed of rendering isn't dependent on that either, since you're free to not load the libraries containing x feature.

What direct x really do is push features that can easily be implemented on several platforms, so that developers doesn't have to code everything themselves from scratch. That sort of development is very advanced and not something your average programmers do.

as an added benefit, you're not paying for every developer reinventing the wheel.
OpenGL is the same story.

Apathy Curve(07:07 PM CEST - Aug,15 2014 )
V-ampire> Really nice informed comments.

But after all this is a site for gamers, not opengl/directx programmers, so it is understandable.

It's still funny though.

I don't have to be a code monkey to know that I've been lied to about this exact same issue in exactly the same way on many previous occasions. Implying that my opinion on the matter is therefore uninformed is like saying I can't have a valid opinion about how badly my thumb hurts when I hit it with a hammer unless I'm a licensed carpenter.

In short, it's sophistry. In this case, it is used to make you look like you're smarter and more reasonable than the rest us. You failed.

Buh-bye, now.

Tom(09:21 PM CEST - Aug,15 2014 )
Quit being haters! You are all sounding like Stumpus. All we are missing now is Koogle's hater comments.

DirectX contains the least amount of DX API functions compared to DX10 and DX11, naturally it will not perform as well as DX9 that has been in use, fixed, patched for years. Everyone knows how to code for DX9 but nobody is probably an expert equally in DX10. I could understand when DX10 first came around especially, new cards new DX being used = Crap performance, but this should be in the past.

I'm playing games > directx 9 whenever given a choice. Sorry can't say my games are slow or anything. Must be your crappy gaming rig.

Csimbi(09:43 AM CEST - Aug,16 2014 )
@Tom
Careful what you wish for! ;-)

I've been waiting for optimizations, too - hoping that the DX10+ games would run faster. But they just don't.

V-ampire(03:35 PM CEST - Sep,03 2015 )
Apathy Curve>
In short, it's sophistry. In this case, it is used to make you look like you're smarter and more reasonable than the rest us. You failed.


I've just noted you seem to have only this to rely upon grandpa.
It's recurring.

The comments are still funny, but I don't work for you and you are not being amicable, so I will not waste my time to explain to you why they are.

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