PS4 does not technically have video RAM? I thought it had a unified memory pool.

I don't think that is sound advice to say it is not really needed. Of course it is lol. The PS4 is coming and will regularly use 3GB on video memory. It is needed.

? Most common resolution and frame rate is 1080P @ 60 fps. PC Games don't need 4GB, it's overkill based on what the producers are shipping for the PC market. Yes, some people will want multi-monitor or 120fps/hz setups and that's what SLI or a higher-spec single GPU will give you the power to do - but for single monitor and 60fps/hz @ 1080P, this is overkill. Not sure why you're mentioning the PS4 tbh...

He's mentioning PS4 for ports that will come across next gen.

He's mentioning PS4 for ports that will come across next gen.

Which'll be ported to the lowest common denominator. Currently this figure is 1,024MB of VRAM. Barely 9% of users have 2GB, and less than 1% have 4GB...so where's his logic?

Doing a quick search I can't find anything on PS4 that says it has anything other than unified memory. If that is the case then there is a potential of using more than 2gb for textures etc...

2560 x 1440 you do need 3 GB +

Or 1080p using big/detailed textures 3GB +

Or 1080p using big/detailed textures 3GB +

Hmm, perhaps I need to be hit with some knowledge on this. It is my (perhaps misguided) understanding that it doesn't matter if you got 1TB of vram, if the GPU can't push them around the screen for the resolution and frame rate you're targeting. Isn't it GPU => VRAM ?

Depends on the game...

Depends on the game...

Depend the memory controller, ROP design, cache size etc... i will be intereseted by a review with it, but 680 2 and 4gb, the difference was marginal at best.

Hmm, perhaps I need to be hit with some knowledge on this. It is my (perhaps misguided) understanding that it doesn't matter if you got 1TB of vram, if the GPU can't push them around the screen for the resolution and frame rate you're targeting. Isn't it GPU => VRAM ?

Well, in case of low end card,yes, but in general they dont even have a memory controller suited for the size.. On the other hand, we have seen some case where 2GB, you was going out of Vram.. as for 3gb vs 4gb... yet its a bit short to say 3gb is not enough, but 4 is... ( first, ram usage is hard to determine, even the number given by a software is not accurate and dont forcibly reflect the reality ( games engine will adapt it, and you dont know what is in cache or buffered, or what have been bringing out and in.. )

From every thing I have seen over the years the 256bit memory bus is not wide enough to make use of any thing much over 2GB thats why even at 2560x1440 and 5670x1080 you see little to no difference in 2gb cards vs 4gb cards. I would bet the same would show if they made a Titan with 3GB vs 6GB, the 384bit bus can saturate 3GB just fine and I think 6GB not really needed at all.