(Image credit: Nvidia) In a bid to offer unbeatable performance, Nvidia had planned to use four GPU chiplets in its Rubin Ultra AI accelerator due in 2027. However, due to concerns about the manufacturability of such a solution, the company decided to cancel it in favor of a dual-GPU design that is easier to produce, according to SemiAnalysis . Tom's Hardware Premium Roadmaps Nvidia's Rubin Ultra GPU with four compute chiplets was arguably one of Nvidia's most ambitious projects in recent years, as it not only doubled performance compared to the original Rubin (which uses two compute chiplets), but also increased the complexity of Nvidia's data center GPUs to levels never seen before. However, connecting four near reticle-sized dies using existing advanced packaging technologies is a tremendous engineering challenge, and cooling four complex dies and 16 HBM4E modules is hard and costly.…