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FYI, most discrete GPUs with discrete memory packages soldered to the board near the GPU are running at substantially higher memory frequencies than the on-pack
by wtallis 3y ago
FYI, most discrete GPUs with discrete memory packages soldered to the board near the GPU are running at substantially higher memory frequencies than the on-package DRAM in Apple's chips. But running GDDR at those speeds costs a lot of power.
- osigurdson 3y agoI watched a presentation on this today. The presenter focused on the soldering and proximity as well. Is this really the only difference or is this transistor based memory (like L1, L2, etc.)? I get the proximity factor of course (1ft / ns EE rule of thumb). In any case, soldering and proximity don't seem like breakthrough innovations (but maybe I am wrong).
- MobiusHorizons 3y agoGpu ram is typically gddr6 or gddr6x which is a different standard to the chips used in ddr5 for example. GPUs have terrible latency to ram, but enormous throughput, and I assume the chips are internally optimized for that. Many aspects of a design change when you choose different latency or clockspeed targets translating into different power / area calculations.