(Update) Rumor: PlayStation 5 will be using Navi 9 (more powerful than Navi 10), new update Jason Schreier said Sony aim more then 10,7 Teraflop

[Bofferbrauer2]

Intrinsic said:

Bofferbrauer2 said:

14nm to 7nm doesn't half the size, even though the naming scheme implies it. But those names are decoupled from the actual sized since over 15 years now (since they got smaller than the wavelength of the visible light, which is around 300nm in fact). Vega VII has almost the same amount of transistors as a Vega 64 but is actually only 32% smaller. I calculated the 500mm² by taking the Vega VII plus 65% of the size of a Zen Cpu, which would be 456mm². But to reach those 14TFlops, Navi would need quite a few extra functions, so I added 10% to give space for those, which results in 500mm².

PS4 Pro chip is about the same size as the original PS4 chip, which is about 350mm². A Vega VII, which is produced in 7nm, is already is 331mm². How do you want to reach that power in a ~350mm² package if 95% is already occupied by the GPU - and that GPU isn't even strong enough for the leak. While Navi could be more powerful, it will need more transistors, and thus die space, for that. Getting that much power out of such a small chip is pretty much impossible with the 7nm process.

Vega 64 ad Vega 7 are really bad references to make when talking about next gen consoles. And that is primarily becase they both use HBM RAM. The memory ontrollers for those takeup around 30% of the die space available in those chips!

If you really want to analyze die space usage ou have to do a lot better than that. Take the XB1Xfor instance, it has 12GB of GDDR5 RAM.. its memory controllers fit into a chip thats about 350mm² along with a CPu and  40CU GPU. Going from 12GB of GDDR5 to 24GB of GDDR6 (just an example) will take the same amount of space with regards to on chip memory controllers. Its been calculated that the Ryzen CPU will take about the sameamount of space on a die that jaguar takes right now. That leaves a gd dalaount of space for the GPU. 

Lets be realistic here..... what are we really asking for? Either a GPU with 64CU running at a clok of around 1500Mhz or one ofaround 72CU running at around 1300Mhz.  Fitting either of that into a die sizeof about 350mm² to say 380mm² willnot be a problem. The real issue is how effecient is the architecture, how much power will it draw.... how hot wil it get?

The problem is, if you calculate the space of the 40 CU in the One X and compare it with the 64CU in Vega 64, then there's just almost no difference. The Jaguar CPU part in the One X is tiny, even in 28nm it only took 25mm² (3.1mm² per core times 8) plus the space of 4MiB cache, and in 14nm would be even smaller, the difference would be very small. If we take 300mm2 for the GPU part alone, then 64CU would be 480mm2, almost exactly the size of Vega 64, which is 486mm² tall.

So no, the different memory controller will not magically shrink the chip by a large amount

If we are realistic, then this leak is a hoax, pure and simple. 64CU is the technical limit of GCN, and there's no known way around this, so 64CU at 1500Mhz would be the only option in your opinion. Even in a 7nm Navi like that would consume around 250W without even counting the CPU, RAM or any other part in the console.

In other words, the console would run way too hot and consume too much, nevermind the fact that the chip would be way too large.