AMD's Instinct MI455X: Aiming for the Sun

3 comments

• fancyfredbot25 minutes ago
  It&#x27;s mind blowing seeing these multi exaflop single rack systems.<p>The world&#x27;s first exaflop supercomputer was Frontier. It was launched only 4 years ago in 2022.<p>It&#x27;s not a fair comparison of course. FP4 in Helios barely qualifies as floating point. Frontier was proper fp64, 16 times the bit width and probably 256x as many transistors.<p>All the same just wow. Much compute.
• thyristan1 hour ago
  &gt; The basic GCN microarchitecture underpinned every single one of AMD’s compute accelerators for nearly 15 years [...]. With CDNA5 AMD has moved over to a microarchitecture that is based on the RDNA series putting a bookend to the long-lived line that was the GCN microarchitecture.<p>So everything is new again. Will this be another &quot;buy now, have ROCM work in 3 maybe years if you are lucky&quot;?
  • p_l1 hour ago
    Arguably this might reduce it, because now ROCm won&#x27;t be prioritised for the GCN-based systems?
• dist-epoch57 minutes ago
  432 GB of RAM per chip. Tens of terabytes per rack. Clients queuing up to buy them.<p>RAM prices are not coming down any time soon.
  • swiftcoder5 minutes ago
    Hey, they are only projected to cost about $5.5million a rack. Pocket change, really
  • nl50 minutes ago
    Did anyone think RAM prices were coming down soon?
    • ACCount3742 minutes ago
      Of course. Wishful thinking is a true staple of human intelligence.