A cure for the memory crisis? John Carmack envisions fiber cables replacing RAM for AI usage, which would mean a better future for us all

• John Carmack has shared an idea for using fiber rather than RAM
• This is a vision of the future for replacing RAM modules in AI workloads
• While it's highly theoretical and a long way off, there are other possible nearer-term solutions to reduce AI's all-consuming appetite for RAM

John Carmack has aired an idea to effectively use fiber cables as 'storage' rather than conventional RAM modules, which is a particularly intriguing vision of the future given the current memory crisis and all the havoc it's wreaking.

Tom's Hardware noticed the cofounder of id Software's post on X where Carmack proposes that a very long fiber optic cable – and we're talking 200km long – could effectively fill in for system RAM, at least when working with AI models.

Carmack observes: "256Tb/s data rates over 200km distance have been demonstrated on single-mode ...