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[DT] PS4 More Efficient Than PCs At Running Virtual Reality - Page 2

post #11 of 99
Quote:
Originally Posted by MonarchX View Post

Yeah, but in this case, their "Same-Spec PC" is actually an i5 with GTX 970, which is nowhere near the system specs PS4. In this case, it makes PS4 is like 300% more efficient in VR.
I really doubt that since there is no proper way for us to test this claim. They can say 100% for all we know and we would have to take their word for it.
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post #12 of 99
I can think of two things going into this:

-Dx12/Vulkan-like API
-fixed function hardware being really efficient. The interpolation done by the tiny box basically halves your GPU performance needs, and while it does come with plenty disadvantages, it shouldn't take a lot of power. 100% more efficient than GCN 1.0/1.1 (what was it?) usually is!

Guess the maths work out to be about 60%, taking CPU into account one way or another as well, vs whatever reference PC hardware they run, sounds fair.
Edited by Tivan - 2/28/16 at 1:55pm
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post #13 of 99
Even a i5 with GTX970 is no ideal for VR. You need i7 + GTX980 Ti min.
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post #14 of 99
Quote:
Originally Posted by GrandMax View Post

Lol. Exactly my thoughts...


That would be LOL if they specified PC specs below those we consider equal to PS4, like GTX 750 Ti with some i3 CPU, which are the specs that are similar to those of PS4. In this case, its not LOL, because the specs they talked about are way above those of PS4-equivalent specs (GTX 750 Ti + i3) !!! GTX 970 for same performance as PS4? That's some crazy PS4 optimization OR super-crippled PC VR drivers from NVidia...

Then, I wonder if VR is one of the reasons Pascal is going to be that much faster than Maxwell. It will not be a regular jump, but a very steep one. Performance improvements will be insanely huge, especially if you consider DirectX 12!
post #15 of 99
Quote:
Originally Posted by ZealotKi11er View Post

Even a i5 with GTX970 is no ideal for VR. You need i7 + GTX980 Ti min.

That's for 1080p at Very High, not Ultra settings or 4x TXAA! All VR is 1080p, right? Any reviews already? Is it worth it?
post #16 of 99
Quote:
Originally Posted by MonarchX View Post

That's for 1080p at Very High, not Ultra settings or 4x TXAA! All VR is 1080p, right? Any reviews already? Is it worth it?

Its not 1080p. Its 2160x1200. Also 90 Hz. That means to compare 1080p to 2160x1200p90 there is a difference of 2073600 pixels per second vs 3888000. You are talking about double. Even more than 1440p60. GTX970 might do 60 fps for most games 1080p but not 1440p.
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post #17 of 99
Quote:
Originally Posted by MonarchX View Post

That would be LOL if they specified PC specs below those we consider equal to PS4, like GTX 750 Ti with some i3 CPU, which are the specs that are similar to those of PS4. In this case, its not LOL, because the specs they talked about are way above those of PS4-equivalent specs (GTX 750 Ti + i3) !!! GTX 970 for same performance as PS4? That's some crazy PS4 optimization OR super-crippled PC VR drivers from NVidia...

Then, I wonder if VR is one of the reasons Pascal is going to be that much faster than Maxwell. It will not be a regular jump, but a very steep one. Performance improvements will be insanely huge, especially if you consider DirectX 12!

The PlayStation 4 and PlayStation VR use Re-projection, this is Sony's ace up their sleeve in the VR Game.
The developers can have a frame-rate target of 60 fps instead of 120 fps, this is then reprojected to 120 fps.

This greatly reduces the hardware demand as they would need to push twice the frame-rate if they didn't have Re-projection.
Because of this, the hardware demands for VR on the PlayStation 4 are significantly lower than that of a PC.

PC VR headsets such as the Oculus Rift and HTC Vive have a refresh rate of 90Hz, you would want to run VR games close to the refresh rate of the display, or possibly 75Hz.

Alongside that the PC VR headsets such as the Oculus Rift and the HTC Vive have higher resolution displays than the PlayStation VR, however the PlayStation VR has a higher refresh rate of 120HZ, compared to the 90Hz displays of the Oculus Rift and the HTC Vive.

So with PC VR, not only do you have to run games at a higher resolution, but you also have to run them at a higher frame-rate than the PlayStation 4, making the hardware demands significantly higher.

Until re-projection is used on PC VR, or an alternative to save computational power, this will always be the case.

TLDR: Sony are cheating to get 120 fps, while on PC you need the horse power to get there. I'm joking, but re-projection is one hell of an advantage!

I really hope it is possible to use the PlayStation VR on PC, whether it is official support from Sony, which I highly doubt, or unofficial support by the use of software modifications.

I can imagine it being quite a task to get it working properly though. The software for it would probably have to be built from scratch to support it's features such as head tracking.
Edited by TopicClocker - 2/28/16 at 2:24pm
post #18 of 99
I've already determined I'd get the sony one, someone will come out with a mod that lets us use it on PC too.
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post #19 of 99
Thread Starter 
Quote:
Originally Posted by SpeedyVT View Post

I've already determined I'd get the sony one, someone will come out with a mod that lets us use it on PC too.

Using it on PC would sort of kill the whole point of it though since it's most efficient when paired with Sony hardware.
post #20 of 99
Are they even comparing it not just resolution wise, but settings wise? Same exact textures? Same exact AF or AA?
Since PS4 usually runs at lower textures and less settings in order to keep things smooth, then comparison is not a GTX 970.
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