NVIDIA Rubin & Rubin Ultra Platforms Facing Design/Spec Issues per Rumors, While AMD MI500 Is Positioned for a 2H 2027 Launch

Reports say NVIDIA is revising Rubin and Rubin Ultra due to HBM4/4E, yield, warpage, and cooling concerns.

The rumored changes include fewer chiplets, lower HBM stack targets, and packaging or heatspreader redesigns.

These issues could delay Rubin’s rollout and slow NVIDIA’s next-gen AI platform plans.

If NVIDIA slips, AMD’s MI500 could gain a timing advantage with a possible HBM4E launch in 2H 2027.