Forums - Sony Discussion - PC, PS4 comparison Unreal Engine 4

Finally I found.

"The UE4 demo is running on PC, specifically an Intel Core i7 processor with an NVIDIA GTX680 and 16GB of RAM - what Epic terms a standard development box."

Of couse the Demo not used all these 16GB RAM but I think it used more than 4GB VRAM + System RAM combined... the Epic DevMachine have the same amount of RAM present in the new DevKit for PS4.



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This is Tech demo stuff for LAUNCH PS4 games. Lots of optimisation still to come. Anyway, i'm looking foward to what ND can crank out within the PS4 lifespan (Compare Drakes fortune to TLOU).



ethomaz said:

sieanr said:

And the GPUs VRAM is the only thing being used to draw what you see on screen. Thats it, 2gb for all those textures, lights, particles, ect.

The main RAM in a computer is used by the CPU, and only the CPU. To give you some point of reference, crysis 2 uses about 800mb of system ram., ie what the CPU is using.

Battlefield uses ~1400MB... now get the PS4 4GB RAM unified and remove the OS part (1GB?) and you have 3GB for the game.

I'm pretty sure the Elemental Demo uses more than 3GB RAM (GPU + CPU).


What are you not understanding about this.

VRAM, that is attached to the GPU, is what the GPU is using to draw everything you see on the screen. Literally everything; every texture, model, particle, ect and the frame buffer. In the case of the GTX 680 that is 2gb, which means the most that it can be using for every assest you see on screen is 2gb.

Now how much system RAM is being used is who knows how much. You cited battlefield at 1400mb, and I'm going to assume you are referring to BF3. In that case, BF3 is using around 1400mb in VRAM. Hey, what you are saying is ture this time! sorta.. This is not system ram but the VRAM on the GPU, and BF3 uses around 700-800mb of system RAM attached to the CPU. Get it? Thisgives you a total memory usage of around 2gb, 1.4gb on VRAM and .8gb on system ram.

I'd be shocked if a demo, which may very well be using all 2gb of VRAM is using over a gig of system RAM when a complex full featured game like BF3 comes nowhere close.

 

But again RAM is going to mean jack when the PS4 is playing a demo like this. Fill rate, pixel shader rate, ect are the bottlenecks rather then ram, and there is nothing you can do to magically get around those fillrate limits.



Leo-j said: If a dvd for a pc game holds what? Crysis at 3000p or something, why in the world cant a blu-ray disc do the same?

ssj12 said: Player specific decoders are nothing more than specialized GPUs. Gran Turismo is the trust driving simulator of them all. 

"Why do they call it the xbox 360? Because when you see it, you'll turn 360 degrees and walk away" 

sieanr said:

What are you not understanding about this.

VRAM, that is attached to the GPU, is what the GPU is using to draw everything you see on the screen. Literally everything; every texture, model, particle, ect and the frame buffer. In the case of the GTX 680 that is 2gb, which means the most that it can be using for every assest you see on screen is 2gb.

Now how much system RAM is being used is who knows how much. You cited battlefield at 1400mb, and I'm going to assume you are referring to BF3. In that case, BF3 is using around 1400mb in VRAM. Hey, what you are saying is ture this time! sorta.. This is not system ram but the VRAM on the GPU, and BF3 uses around 700-800mb of system RAM attached to the CPU. Get it? Thisgives you a total memory usage of around 2gb, 1.4gb on VRAM and .8gb on system ram.

I'd be shocked if a demo, which may very well be using all 2gb of VRAM is using over a gig of system RAM when a complex full featured game like BF3 comes nowhere close.

 

But again RAM is going to mean jack when the PS4 is playing a demo like this. Fill rate, pixel shader rate, ect are the bottlenecks rather then ram, and there is nothing you can do to magically get around those fillrate limits.

This picture shows system or VRAM lol lol lol

Every game need system RAM to run... not only VRAM.



Anyway @sieanr where are you getting 2GB for GTX 680 in this Demo??? I'm curious because there GTX 680 with 2GB, 3GB and 4GB... and I can't find nothing about this specific GTX 680.

Edit - Fixed.



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ethomaz said:

sieanr said:

If its true, but about the wrong demo, then... well, thats not true.

 

As far as RAM goes, the GTX 680 is a 2gb card. Now why wouldn't the PS4 version look better then the 680 PC version?

Hint; it has to do with fillrate and pixel shader rate. IE 8gb of ram is removing 1 bottleneck from the system, but other bottlenecks still remain.

 

You forget the main PC RAM used in the Demo... PS4 4GB (now 8GB) is for CPU and GPU... the Demo runs with a GTX 680 with 2GB + CPU with XGB... this demo needs more than 4GB of RAM I guess.

That's what the guy in Beyond3D said... seems like the Demo was changed to remove some tech that use a big amont of RAM.


Simply adding RAM wont make whats in the PS4 > than a GTX680. GTX680 will always be better irrespective of the closed system and coding to the metal, customisations etc. It doesnt matter not when the power difference is that big and especially not in a tech demo....



Intel Core i7 3770K [3.5GHz]|MSI Big Bang Z77 Mpower|Corsair Vengeance DDR3-1866 2 x 4GB|MSI GeForce GTX 560 ti Twin Frozr 2|OCZ Vertex 4 128GB|Corsair HX750|Cooler Master CM 690II Advanced|

I just think it's silly to compare a PC rig that costs 3x as much as this yet-to-be-finalized PS4 hardware. You can always spend more to get more on PC, so any comparison is pointless.

That being said, they both look great.



pezus said:
The most important difference here is the lack of depth of field in the PS4 version it seems. On the other hand, it has more fire and lighting in that screenshot

I don't know if it's the depth of field, but it seems the textures in the foreground on the PS4 version are of a much better quality.  Either way, very impressive.  Just imagine what the 2nd and 3rd wave of PS4 games are going to look like.



it's so lovely, we happen to have a graphics major on vgc.. everything he says is clearly true.. without a single citation for his information.. not only that.. but he tends to condescend anything playstation and has done so for the past 5 years plus..



 

mM
TheShape31 said:
I just think it's silly to compare a PC rig that costs 3x as much as this yet-to-be-finalized PS4 hardware. You can always spend more to get more on PC, so any comparison is pointless.

That being said, they both look great.

That's a very good point.  The GTX 680 is going to run you over $400 dollars.  So, the graphic card alone is selling for around what the PS4 is going to launch for.  The fact that they are even comparable is incredible.  And then after developers figure out how to completely utilize the HW, they will be even closer.  Next gen is definitely a good leap forward.