ethomaz said:
GDC. "While the GPU has full access to 176GB/s, one source tells us that the CPU is more constrained at around 20GB/s - still pretty good at around two-thirds the level of bandwidth available to Intel's Ivy Bridge." http://www.eurogamer.net/articles/digitalfoundry-inside-playstation-4 In any case no CPU have this high access to RAM even in PC... 20GB/s is twice the bandwidth used in the TOP Intel CPU in the market. |
uh, two-thirds is 2/3, that's a pretty good number saying 2/3 as well since the benchmark with 2800MHz RAM on dual channel Ivy Bridge came out to 28GB/s (though latency usually suffers from RAM with that bandwidth, it's the same with GDDR5, latency is definitely an issue, but I'm sure the PS4 will be fine). Anyways, 20GB/s is not 2x top Intel CPU at all, they are only comparing current Ivy Bridge dual channel setups which is still faster than the number you are claiming. Now the question really becomes how much latency will be there and how close the parts will be this time around(how many cycles to reach each part.) TBH comparing the PS4 to a PC is silly when you consider how much the cost difference is, a lot of it is PR talk considering that they are practically doing damage control and saying "this is good enough," but that's not a bad thing considering how much they fucked up with the PS3.
