Thanks for the memory: How cheap RAM changes computing

Re:Thanks for the memory: How cheap RAM changes computing by Keyframe on Monday October 17, 2016 @09:11AM (#12724655)

So why did they choose GDDR then?

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Re:Thanks for the memory: How cheap RAM changes computing by valarauca1 on Monday October 17, 2016 @09:34AM (#12724800)

I'm not Sony Engineering so IDFK

GDDR5 trades latency for thoughtput

XboxONE DDR3: 68GB/s CAS 7

PS4: GDDR5: 127GB/s CAS 15

The reason GDDR is normally used in GPU's is the workloads are more predictive, you are doing the same calculation thousands of times, just iterating across a buffer. This is why SIMD/Cache prefetching shine in GPU's. It makes memory latency not as important.

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Re:Thanks for the memory: How cheap RAM changes computing by Keyframe on Monday October 17, 2016 @11:06AM (#12725618)

So, you're saying GDDR is more geared towards operations done commonly in graphics? ;)

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Re:Thanks for the memory: How cheap RAM changes computing by valarauca1 on Tuesday October 18, 2016 @12:16PM (#12735923)

No. I'm saying it is gear to work loads with easily predictable or cache-able memory access patterns.

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