| ninjablade said: i remain skeptical as well but this is suppose to be some kind of new top secret technology from microsoft, i'm very skeptical though cause people with strong bias will say anything. |
eSRAM does not solve the memory bandwidth bottleneck since modern games use 1-2GB of VRAM and eSRAM is just 32MB. At best eSRAM will be used to aid in anti-aliasing or something minor, not major graphical speed up of any kind. They already had eDRAM on the Xbox 360 and it did little to help it have superior graphics to PS3, and that is despite Xbox 360's GPU being faster than PS3's RSX to begin with.
Memory bandwidth for the GPU is like vital performance enhancing nutrients for a sports athlete.
3DMark11
HD6670 GDDR3 = 1594 marks
HD6670 GDDR5 = 2479 marks (+55%)
http://www.overclockers.com/forums/showthread.php?t=710062
People keep talking about 8GB of system memory for Xbox 720 but they conveniently ignored it's DDR3, meaning the GPU is neutured because it has no fast memory dedicated for it. Also, if you look at the diagram, DDR3 has to go through the NorthBridge to communicate with the GPU. That introduces additional latencies. If PS4 has GDDR5 and at least some of it is dedicated to the GPU, not only will it be miles faster than Xbox 720's memory sub-system, but the GPU will be able to access it much quicker (much like it does on a real modern graphics card). Now take a GPU with 50% less GPU power and shared system DDR3 and PS4's GPU + dedicated GDDR5 will mop the floor with it. There is a reason all high-end GPUs on the PC use dedicated GDDR5.....
