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Hmm - if only macpro's had memory that could be upgraded like in the olden days.
by sgt101 2y ago
Hmm - if only macpro's had memory that could be upgraded like in the olden days.
- SV_BubbleTime 2y agoIf it could, it wouldn’t be so tightly coupled and then identical to everything else out there.
- bitwize 2y agoIt also wouldn't be as fast. Soldered RAM is faster than socketed RAM. RAM that is in the CPU package is faster still. Apple is going in the direction of total integration. Louis Rossmann and iFixit will hem and haw, but soon there will be a MacBook whose motherboard, besides cooling, PSU, and ports, consists simply of a single component that houses CPU, GPU, RAM, storage, I/O port controllers, radios (wifi, Bluetooth, etc.), firmware for all of the above, and a security module plus keys, all directly on the CPU bus, and it will be glorious. It will absolutely lap any PC laptop, and in single-core performance will smoke even high-end AMD Epyc beastbox builds because of the aggressive elimination of inter-component latency. But there won't be a need to fix it. If it breaks you just recycle it and buy new, being sure to sync your data back from Apple Cloud -- but it probably won't break. Kinda like how unibody cars are both safer and more reliable than the much more fixable cars of the 60s, even if they crumple like tinfoil and must be totaled upon experiencing any sort of impact.
- menaerus 2y agoApple M1 Max LPDDR6-6400 measured latency is 111 ns so it's not true that soldered RAM is faster than socketed RAM. Source: first figure from https://www.anandtech.com/show/17024/apple-m1-max-performance-review/2 https://www.anandtech.com/show/17024/apple-m1-max-performanc...
- sgt101 2y agoI wonder if that's really set in stone or just a stance that suited Apples marketing for a few years. Maybe there's a business case for some bigger memory Macs now!
- aurareturn 2y agoPart of the reason it has high memory bandwidth is that it is soldered.
- menaerus 2y agoM1 Max for example has ~240 GB/s of memory bandwidth. Do you think this is because they're using 256-bit LPDDR5@6400MT/s part in combination with not sure how many (?) memory channels or because they soldered it to the chip?
- sgt101 2y agohmm that's a hard one - let's ask Deepseek!
- aurareturn 2y agoM1 Max has 400GB/s.
- menaerus 2y agoNow go find us the benchmark that shows M1 Max is able to saturate the bus with more GB/s than what I said above.
- qingcharles 2y agoWow, I had to go confirm this for myself. This sucks. They max out at 192GB on the current M2 line, which is absurd. Hopefully this year's M4 Ultra systems will at least allow a much higher top spec.