Moreover, there is an obvious way to solve this without soldering the fast memory to the system board -- you solder it to the CPU. This is not only lower latency (traces don't have to go through the system board at all) and lower cost (don't need extra pins between the CPU and the system board), it allows you to upgrade the memory by upgrading the CPU. And isn't incompatible with still having dedicated slots on the system board to add additional memory with less memory bandwidth. Which is typically what you want anyway because if you're going to solder something to the processor, you're better off to actually use HBM or GDDR (which is even faster), but then you don't want all of the system memory to be that because it costs more, many applications don't need it and cache hierarchies are a thing for a reason.
Re:Nvidia's "Grace" Arm CPU holds its own against x86 for HPC
by rangestransform on Thursday February 08, 2024 @11:43AM
(#39304146)
If you want the same memory bandwidth and latency in your windows laptop, you would similarly need to have soldered LPDDR5 memory and pay the premium for it
Re:Nvidia's "Grace" Arm CPU holds its own against x86 for HPC
by AnthonyMouse on Friday February 09, 2024 @03:56AM
(#39312862)
You pay a premium for GDDR or HBM because they're actually faster. LPDDR5 isn't, Apple just used the equivalent of a larger number of memory channels to increase the memory bandwidth (x86 servers do the same thing) and then charges a premium for the ordinary memory chips because they can get away with it.
You're assuming that resale value matters for most people, when it probably doesn't (many will use hardware until it's dead, or will pass it on to siblings, which renders the resale value moot).
And I fundamentally disagree that Apple products work better, and especially enough to merit the price difference. A fun case is RAM/disk upgrades. You really cannot say that Apple's premiums on 16GB and more RAM have anything to d with their hardware/software being better (and again, it really isn't).
If you're curious why I think Apple hardware/software isn't better, in no particular order:
* hardware is pretty good, but with limited options (I want a matte screen ffs, the reflections of glossy screens kill my eyes over a few hours) and brutal premiums for trivial things like not having only 8GB of RAM available.
* UX is actually pretty bad. As someone who grew up on Windows, has used various Linux distros with GNOME or KDE extensively, macOS is a nightmare for a few reasons:
So no, I don't think Apple products really work that well, or are worth the massive premiums they ask for them. There is a decent ecosystem, but it locks you in it, so IMO most people are paying for the brand and due because that's all they know (hammer, nail, etc.)