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How is Apple packing 512gb of ram on their cpu?
by thefounder 6mo ago
How is Apple packing 512gb of ram on their cpu?
- whaleofatw2022 6mo agoIIRC Apple is using the lower channel width options in LPDDR5. I.e. instead of 64 bit channels they do 16 (or maybe 32) bit. That lowers the die area needed on the chip for memory controllers. But it also impacts bandwidth, AFAIK an M4 ultra is still on the order of 1/4 the bandwidth of something like a 5090