5 ms·
I can't help but feel the elephant in the room is just LPDDR and the extra third of memory bandwidth the M1 has over Intel. ...but no one seems to talk or care
by jayd16 6y ago
I can't help but feel the elephant in the room is just LPDDR and the extra third of memory bandwidth the M1 has over Intel.
...but no one seems to talk or care about that. All the talk seems to focus on much more arcane things like instruction reorder buffers and not simple fundamentals.
- tuatoru 6y agoI mostly agree, but it's not the only thing. Apple made a bunch of incremental improvements in the basics, this being one of the bigger ones. Reducing the movement of data, implementing common operations in hardware (there was mention of an object allocation being an extremely common client software operation that they implemented in hardware), bringing RAM physically closer to processors (reducing the die area and power budget needed for interfaces), higher bandwidth and lower latency paths to backing store--there were a lot of conceptually simple improvements. And perhaps the switch to a more regular instruction set helped somewhat. Apple could see a lot of performance being left on the table in pieces of varying size.
- als0 6y agoDon’t 13” Intel MacBooks use LPDDR?
- Macha 6y agoHasn't DDR4 been available to ice lake and mobile ryzen for a while now? Also been a couple of laptops to put desktop class intel cpus in over the years.
- jayd16 6y agoYes, but for whatever reason the M1 is clocked at 60GB/s with Intel's best being around 45GB/s, from what I've read.