Question Samsung GDDR7 memory to offer 36 Gbps bandwidth

TESKATLIPOKA

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May 1, 2020
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Videocardz and TPU released news about Samsung's next gen memory.
GDDR7 should go up to 36gbps and be 25% more efficient thanks to PAM3, but If I think about It then It should still consume more power than 20gbps memory for example.
 

TESKATLIPOKA

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May 1, 2020
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Where does a GPU live in a system?

Pcie slot.
And how does Pcie slot affect GDDR memory exactly? I don't see much of a connection there.
PCIe affects data transfer between CPU and GPU.
If there is not enough Vram, then GPU has to load data from main memory, but I don't think that was your point.
 
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Tech Junky

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So, if you have a decrepit old system that only has PCIE 3 slots you wouldn't have the bandwidth to take advantage of the full 36GB/s the GDDR is capable of. If you had more than a single GPU that bumps it down to a X8/X8 configuration even on PCIE 4 you would not be able to take advantage of the full speed of the GPU.
 

Tech Junky

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VRAM to render and calculate.
I'm looking at things from end to end. If you don't have enough bus bandwidth there's going to be a bottleneck when moving it back tot he rest of the system.

Kind of like hooking up a SSD to a SATA II interface that's capable of 300MB/s and limiting yourself to 375MB/s vs the full potential of ~550MB/s.

Will it work? Sure. Will it be great? Maybe.

Sort of like when you add a 2nd GPU to a system that steps down the bus from x16 to x8/x8 due to limited CPU lanes.
 

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