Quote:
Originally Posted by sergionography
we also know it will have 18gcn clusters = 1152 gcn cores rated at 800mhz
and it was rated at 1.84gflops or something actually
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yep, I forgot about those changes, thanks.
Quote:
Originally Posted by cadaveca
What Latency?
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Quote:
Originally Posted by sergionography
we also know it will have 18gcn clusters = 1152 gcn cores rated at 800mhz
and it was rated at 1.84gflops or something actually
as for the latency then i guess its up to the custom hsa memory controller, i would bet on that to handle things, after all the chip is an apu and its interesting to see what a buff apu can do, as the latency between cpu and gpu is much lower so gpgpu on an apu is much better than on a dedicated gpu with the same specs, and with gddr5 the high bandwidth will cover up the latency especialy that on consoles developers will optimize specifically for the hardware so it wont be too hard to tap into the flops available
and above all the good news out of this is that amd is smart to offer a multicore solution with with high latency to optimize because if anything this will only make their desktop solutions shine in future games since developers will start to work around it. this might explain why with steamroller amd paid no attention to most of the higher level cache subsystem (high latency on l3 and l2 cache)
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Don't forget that it's not DDR5 but GDDR5! There is a significant difference. GDDR5 is basically a heavily tweaked DDR3 (well, not exactly, but let's just forgot the little details for the sake of the subject). They sacrifice the low latency of the DDR3 to boost the bandwidth. GPUs don't really need very low latencies since their parallel nature "comes to the rescue" when a thread/calculation stalls, and only internal speed what matters the most, to be able to move large amount of data chunks as fast as possible.
Don't get me wrong, I'm sure Sony knows what they are doing and eight CPU cores is apparently makes it parallel enough to use GDDR5 as system memory, but I'm still very curious how they are doing it, because if it's better, I sure want something like that on our PC side as well
