Forums - Gaming Discussion - Ethomaz's Dismantling the Myths: PS4 GPU is Based in a Mobile GPU

In the late time I saw in the forum a lot of guys saying "PS4 GPU is based in a Mobile GPU... so it is weaker compared to Desktops GPU". I always thought if that guy knows what he's talking about?

I resolved to make clear something FACTs about PC GPUs and kill this MYTH.

On PC architecture there is no real difference in the GPU used in Desktops and Mobile by nVidia and AMD, in fact the chips are exactly the same... no more units, or difference in the physical chip itself.

So you ask me... what the difference between Desktop and Mobile GPUs? The awnsers are...

  • Drivers
  • GPU/Memory clock

The first difference is the driver for Mobile is optimized to POWER SAVING... I mean change power states to use the less power possible and economize battery from your notebook (or other equipment)... and the Desktop is optimized to MAX PERFORMANCE without care about power saving because the Desktop is always puggled in the energy supply.

The second difference is the clock... so AMD and nVidia choose the clock to have the best performece/power saving scenario for Mobiles and choose the high clock possible for Desktops.

So there are no diffence istead Drivers and Clock? No, and I can share a little more with you... the Quadro (Nvidia) and FirePro (AMD) GPUs uses the same GPU for Mobile/Desktop with drivers optimizes for workstation and apps like 3DMax, Maya, etc. And the nVidia Titan uses the same GPU found in the Tesla GPU and again the difference is the drives optimized to GPGPU in Teslas GPUs.

Are you saying the Desktop, Mobile and Pro GPUs are the same? Bingo... hell yes.

Some exemples:

Radeon HD 8870 (OEM Only)
Radeon HD 7970M
Radeon HD 7870 GHz Edition
Radeon HD 7850
Radeon Sky 500
FirePro W5000
FirePro W7000
FirePro S7000
FirePro R5000

All there GPUs cards uses the sames GPU...

Pitcairn, 28nm, 212mm², 1280:80:32 (full enable units)

* HD 7850, W5000, R5000 have some units disabled but the chip have all of them... there are even some cases you can enable these units through BIOS updates *

So stop with this nonsense about "PS4 have a mobile GPU" because there are no difference between Mobile, Desktop and Pro GPUs.

Any sugestion or correction... please tell me.



VizionEck

"Making haters eat crow since 1994"
Lord of Gran Turismo - Ethomaz the Undertracked

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Good read guys... I tried to give my best but English is not my primary language.

VizionEck

"Making haters eat crow since 1994"
Lord of Gran Turismo - Ethomaz the Undertracked

This should draw some hilarious aggro.





4 ≈ One

To be honest, it really shouldn't matter. People will argue over trivial things but as long as the PS4 is a considerable jump in physics/Graphics then people shouldn't care if it is mobile or desktop. This will be an argument that is completely pointless in the coming years.

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I wait for the die shots to see if there is any similarity between existing 78xx variants and the PS4 gpu. I'm pretty sure there is barely any layout similarity at all to detect in the end. PS4 gpu is heavily tailored to whatever it needs to do in the cpu/gpu/memory controllers/video compander processor ecosystem. Lots of generic stuff in 78xx's simply does not exist, other stuff not in a conventional pc-gpu are included (direct command bus, for example). My guess is the gpu will occasionally perform above 7870 levels given the stuff it might contain, so any "it is like a xxxxx" isn't really meaningful.



drkohler said:

I wait for the die shots to see if there is any similarity between existing 78xx variants and the PS4 gpu. I'm pretty sure there is barely any layout similarity at all to detect in the end. PS4 gpu is heavily tailored to whatever it needs to do in the cpu/gpu/memory controllers/video compander processor ecosystem. Lots of generic stuff in 78xx's simply does not exist, other stuff not in a conventional pc-gpu are included (direct command bus, for example). My guess is the gpu will occasionally perform above 7870 levels given the stuff it might contain, so any "it is like a xxxxx" isn't really meaningful.

Yeah... PS4 GPU have added 6x ACE and 6x Queue Pipelines... 8x8 instead 2x2 of Pitcairn.



VizionEck

"Making haters eat crow since 1994"
Lord of Gran Turismo - Ethomaz the Undertracked

Dgc1808 said:

This should draw some hilarious aggro.


Good thing that I visited this thread, I love that gif :')

 

On-topic: Really it's not an important thing if the GPU is based or not on a mobile solution, because Sony has already given the (apparently really decisive nowadays) FLOPS figure... But again, that's not so important really, because on console (some) developers should be able to get a bit more out of every operation when creating their games in comparison to PCs.



I don't know if you guys realized but the new HD 8870 (OEM only) launched this year is the same HD 7870 GHz Edition... just another name.



VizionEck

"Making haters eat crow since 1994"
Lord of Gran Turismo - Ethomaz the Undertracked

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Honestly, I had never heard this argument that the GPU was based on a mobile one. The CPU however is a different story...as it is a Jaguar which is designed for tablets, netbooks and the like. It is an 8 core Jaguar, sure...but still.

It REALLY doesn't matter though since this is a workhorse and hopefully developer budgets don't get in the way of pushing the limits of the system. I mean, unless you are going to buy every system and compare games for each personally....why does it matter if [game] looks better on [other platform]? If you enjoy the games and how they look, it shouldn't have any effect on you what the actual hard numbers are for each system...PS4/720/WiiU/PC/PS3/360/Vita/3DS/Ouya/Steambox...whatever.