News for hackers. Stuff that matters.

A comment on SK Hynix Reveals DDR5 MCR DIMM, Up to DDR5-8000 Speeds for HPC. Parent comment

Re:SK Hynix Reveals DDR5 MCR DIMM, Up to DDR5-8000 Speeds fo... by PragmaticPulp on Monday December 12, 2022 @12:29PM (#33957463)
> We seem to be getting to the point that CPUs are no longer I/O bound.

These memory modules are for server and HPC use, where memory bandwidth is still a major limitation for many workloads.

Your desktop CPU may not be memory I/O bound for your average single-task desktop use case, but a 128-core server running intense workloads or doing HPC can definitely be I/O bound.

Even desktop gaming applications show benefits from memory overclocking in most cases, so it’s not something that can be dismissed.

[ Parent | on HN ]
Re:SK Hynix Reveals DDR5 MCR DIMM, Up to DDR5-8000 Speeds fo... by rbanffy on Monday December 12, 2022 @02:15PM (#33958858)
> Your desktop CPU may not be memory I/O bound for your average single-task desktop use case, but a 128-core server running intense workloads or doing HPC can definitely be I/O bound.

Indeed. From my measurements (very unscientific), processes stall first for IO, then for CPU resources, then from memory.

[ Parent | on HN ]