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You're right, with on PS4 it being GDDR5. It leaned towards graphics, not system, requirements. Not exactly the breed you'd find in regular stuff.
by Keyframe 10y ago
You're right, with on PS4 it being GDDR5. It leaned towards graphics, not system, requirements. Not exactly the breed you'd find in regular stuff.
- valarauca1 10y agoThe primary difference between GDDR and DDR is 128bit vs 64bit bus. GDDR is also normally SRAM, but DDR can be SRAM, but it is normally DRAM. Saying one is geared to graphics is just marketing.
- Keyframe 10y agoSo why did they choose GDDR then?
- valarauca1 10y agoI'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.
- Keyframe 10y agoSo, you're saying GDDR is more geared towards operations done commonly in graphics? ;)
- valarauca1 10y agoNo. I'm saying it is gear to work loads with easily predictable or cache-able memory access patterns.
- xenadu02 10y agoI think you meant SDRAM not SRAM?