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> generation leap in RAM You mean the exact same LPDDR4X that everyone else uses now? Maybe not in huge quantities but there are a lot of AMD Renoir and Intel
by floatboth 5y ago
> generation leap in RAM
You mean the exact same LPDDR4X that everyone else uses now? Maybe not in huge quantities but there are a lot of AMD Renoir and Intel Tiger Lake laptops with the same 16GB setup.
- sudosysgen 5y agoThe M1 Max and M1 Pro uses LPDDR5, not LPDDR4X. LPDDR5 is around 6 times faster than LPDDR4X but the CPU can use a bit less than half of that. If you compare the M1 that uses LPDDR4X it loses or ties in multicore and is barely faster in single core.
- gautamcgoel 5y agoWait, how is LPDDR5 6 times faster than LPDDR4X? I thought the bandwidth of DDR5 is roughly 2x that of DDR4 - and that is assuming you run the DDR5 at it's highest rated clockspeed, which no ones does yet since the technology is not fully mature.
- rasz 5y agoI think he meant whole systems. M1 Pro comes with 256bit bus (2 custom LPDDR5 chips) and 200 GB/s, M1 Max with 512 (4 custom LPDDR5 chips) and 400 GB/s. M1 is 128bit bus (2 custom LPDDR4 chips) and 60 GB/s? 400/60 = ~6
- floatboth 5y ago> LPDDR5 is around 6 times faster than LPDDR4X 6 times?! What? No generational improvement in the last decade (if not two) was six-fold. https://www.samsung.com/semiconductor/dram/lpddr5/ https://www.samsung.com/semiconductor/dram/lpddr5/ Samsung marketing says 1.5 times.