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What I don't get is, why the lowered RAM limit? Wouldn't being able to run a 512GB model on the GPU be a big selling point?
by shrubble 3y ago
What I don't get is, why the lowered RAM limit? Wouldn't being able to run a 512GB model on the GPU be a big selling point?
- jitl 3y agoI think it’s a symptom of the same system design - Apple needs the RAM on the chiplet or as close as possible, because it’s shared with the GPU and wiring the GPU up to standard DIMMs all the way out on a motherboard would yield unacceptable latency. These are essentially phone CPUs that got super super beefy - they’re limited by what they can fit in their chiplet/system-on-chip. There’s no allowance for heterogeneous hardware access like a second tier of RAM via a motherboard northbridge or something. I think they’ll get to those higher RAM densities by M4 or M5 once they have more die space to spend on memory controllers.
- villgax 3y agoFor M5 maybe