That's correct, RAM wont make a difference. They can up the amount of shaders (a different GPU configuration) or increase the clock speed (increases heat/power).

The RAM is an interesting point in rumors. Rumors suggest that PS4 Neos would have 1GB more to work with for games. Current PS4s have 4.5gb for games and 3.5gb reserved for OS, PS4 Neo would have 5.5GB for games and 2.5GB for OS.

If you ask me, this strongly implies on what the Microsoft boss said before that Scorpio (and Neo should be the same) won't do anything for you unless you have a 4K TV. What this means is that PS4 Neo games will only have the 4K native/internal rendering resolution; all else like textures, filters, and effects remain the same as regular PS4.

Further, some people claim that current PS4 Neo specs (rumors) isn't enough for 4K gaming. If you ask me, with Vulkan and simply a higher internal rendering resolution then current specs should be enough to do 4K and 30/60fps similar to PS4 regular game.

I am no expert, but I have an informed idea. Getting the GPU to 5TF would be as simple as up clocking it from 900+MHz to 1100+MHz. Considering the GPU it's based on is designed to run at 1300-1400Mhz it's not beyond reason that such a bump can happen (I personally believe it's guaranteed to happen). 

It will require a really good cooling system though, as the heat generated from running at higher clocks is likely the single biggest issue so would have to contend with. Then again, Sony is first and foremost a hardware company so if someone can pull this off it will be them. 

Another thing to consider is the maturity of the 14nm fabrication process. Simply put, for every 100 chips bought right now only 80 of them may reliably be able to run at a higher clock. So if they wanted to go with a 1.1Ghz GPU they may have to bin like 20 out of every 100 chips. While going with 900mhz could mean that they could use 100 out of a 100 chips. What that means at the end of the day is that going with a higher clock will be all round more expensive for sony. 

As for RAM, at this level and if targeting higher resolutions and higher/more stable framerates then memory bandwidth is actually more important than memory quantity. I doubt adding 4 extra gig of ram would make that much if a difference. But it's also not the hardest thing in the world to do if it's something they considered from the start of designing the Neo. 

I've been looking at this and it seems like the only way to do it would be to go the Polaris 10 route with 32 CU running at 1300mhz. Apparently the less CU you have the cheaper it is on power consumption. That would give you 5.5TF performance. 

Currently the Neo specs are rumored to have 36CU @911mhz. If they stick with this option, they will need to clock the processor to 1100mhz to hit 5TF. 

The Tomorrow Children will launch globally on Sept.6/7. An evening with Dylan in a Russian restaurant in Tokyo :D pic.twitter.com/5AOhGFIqPG

— Shuhei Yoshida (@yosp) August 31, 2016

Don't invest one iota of 'hope' in it, just let it settle ...

Yeah, no. This would require an upgrade which would be more than just an upclock of the Jaguar CPU.

Hush, both of you. I didn't come here to think, I came here to dream. 

Than just dream that I didn't post it :)

In all seriousness, I say it here, clear and loudly: The PS4 Neo, no matter how powerful it might be with upclocking the PS4 hardware, will not be powerful enough to emulate the PS3.

Like this...?

I really wonder what people expect from a game console design.