M3 Ultra has a 1024 bit memory bus (819 GB/s) and starts at $3,999 (96GB of RAM). It can be done....
The tradeoff is that the M3 Ultra's GPU loses to laptop GPUs in compute benchmarks. All of that bandwidth is wasted idling for token prefill.
For inference workloads, it makes a lot more sense to optimize for prefill/ttft before maxing out memory bandwidth.
alt Hacker News
The tradeoff is that the M3 Ultra's GPU loses to laptop GPUs in compute benchmarks. All of that bandwidth is wasted idling for token prefill.
For inference workloads, it makes a lot more sense to optimize for prefill/ttft before maxing out memory bandwidth.