3 ms·
Why?
by femiagbabiaka 6mo ago
Why?
- bestouff 6mo agoRunning local AI requires unified memory.
- luyu_wu 6mo agoThe iGP can access shared memory the same as with any modern system. I'm confused where you got this idea from.
- dehugger 6mo agoThere is a huge difference between on-die and off-die memory. Where that shared memory is located matters immensely.
- Rohansi 6mo agoAssuming you're referring to Apple Silicon's memory bandwidth, that is not necessarily because the memory is on-die. The bandwidth comes from having more channels to access memory. This gives the SoC a wider bus to increase throughput vs. your typical x86 system with two channels. For whatever reasons Intel/AMD decided that two channels is all the typical consumer chips can support now so it's on them.
- ColonelPhantom 6mo agoYou mentioned Strix Halo, which also has off-die memory. Strix Halo does have a real advantage from its wider memory bus (four channels for 256 bit instead of 128 bit), but Strix Point is equivalent-ish to Intel's platforms like Panther Lake or Arrow Lake in terms of memory setup. In fact, Intel also had Lunar Lake, which had on-package memory. However, it was still limited to 128-bit dual-channel, so there weren't really many performance benefits; it did however help with power efficiency.
- fulafel 6mo agoMacs or other competing systems don't have on-die memory. (Except for the caches, which everybody has)
- kcb 6mo agoNonsense, Apple has on package memory and the primary reason for that is overall packaging and layout not performance
- dehugger 6mo agoI appreciate everyone's corrections here, my apologies. I clearly misunderstood the situation.
- bestouff 5mo agoSame same
- sdwvit 6mo agoIt is much slower, but still possible to run on ram
- Rohansi 6mo agoThere is no VRAM in this laptop so how is it not unified? The CPU and GPU both share the same memory.