PS4 'isn't quite as powerful as Epic was hoping for,' Digital Foundry reports

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Hynad said:

Oh really? You have more than 8GB of GDDR5 in your PC? 

What are the specs of that PC?

In the sig. Sheesh.

VGKing said:

You have higher than 8GB of GDDR5 in your PC? No, you don't lmfao. 

There aren't really any cons to having a unified pool of memory. PS4 has both the quantity and quality it needs.(8GB + high bandwidth). The main thing we should be comparing this to is the next Xbox and based on current spec rumors, PS4 has the best design.

Yes I do.
I have triple Radeon 7970 3gb cards, I did hunt around for some 6gb cards to water cool.
I have 9Gb of physical GDDR5 memory in my PC and 32Gb of Quad-Channel DDR3, you think the PS4 has lots of ram. Haha.

However, although I have 9gb of GDDR5 memory in total, only about 3gb of memory is seen by games, as graphics cards don't have the interconnect to talk to each other with enough bandwidth to combine those memory pools, so instead each card gets the same data.
But I still have 9Gb of GDDR5. :P

ethomaz said:

The GPU have a full 174 GB/s access to the RAM... the CPU have only 20 GB/s access to the RAM... even in parallel with CPU using all the band reserved for it the GPU still have 154 GB/s access to the RAM.

Which is enough for 1080P gaming for a year or two before games will be forced back into 720P land again.
GPU's in the PC space already have 288Gb/s at the high end, next generation will boost it to 384Gb/s if the rumours of the hardware are to go by and that's memory bandwidth JUST for the graphics card.

Also, what about the other components? CPU is taking 20Gb/s, what about the optical drive? mechanical drive? I/O processors, they all take some too, so the GPU will still end up less than 154Gb/s of memory bandwidth, making it end up probably with less than a Desktop Radeon 7850's memory bandwidth, ouch.