AMD teases its next gen chiplet-based RDNA 3 architecture

pcgamer.com:

CPU’s weren’t the only thing discussed at AMD’s Financial Analyst Day. AMD definitely wants to impress everyone with its upcoming Zen 4 CPUs(opens in new tab), but a gaming rig is useless without a capable graphics card, and early indicators are that AMD’s next generation RDNA 3 graphics cards will be very competitive indeed.

AMD hasn’t said much about RDNA 3. The cards are still many months from seeing the light of day, but as we get closer, AMD felt it was time to give a brief high-level overview of what we can expect. The thing that jumps out from the solitary slide below is a targeted greater than 50% performance per watt uplift. That’s a very impressive number indeed. Let’s assume a hypothetical RX 7900 XT is 50% faster than a RX 6900 XT(opens in new tab) at 300W. What could it do at 400W, or 450W? Wowsers.

Next up is the confirmation that AMD will migrate to a chiplet design. It's been a kind of open secret(opens in new tab) that it would take this path, but this is the first time we have official confirmation. Of course, we don’t yet know specifically what AMD will build in the end. The demands of a gaming GPU are very different from those of a CPU. It’s a huge step to take and will require some creative engineering to deal with the huge amounts of low latency data that needs to be moved to different dies. I look forward to seeing how AMD tackles this challenge and if there are any bottlenecks that result.

RDNA 3 GPUs won’t be the first GPUs with chiplet designs though. AMD’s Instinct MI200 series HPC accelerators(opens in new tab) feature a multi-chip module design. These include ridiculously high bandwidth HBM2E stacks that can deliver up to 3.2 TB/s of bandwidth, much higher than the 512GB/s of a 6900 XT. So,