Subtitle is rather ironic, given that China has stopped exports of Loongson:32-core CPUs from China incoming.
The key question is whether they really gain anything from sharing a package.Smart way to work around their node restrictions.
The key question is whether they really gain anything from sharing a package.
Years ago, Intel packaged 2 Cascade Lake Xeon dies together in a single CPU, but it was mostly just a PR stunt. They still talked to each other using the same UPI links they'd use, if they were in separate packages.
I think the issue was that it didn't solve a real problem, so there was no market demand. The main thing it let Intel do was seem like they were keeping up in the core-count race, by having a 56-core CPU.I vaguely recall the debacle with all that.
Perhaps it was poorly executed, but at least in that case we're talking about fitting 2 cores into a uni-processor system, where you wouldn't otherwise have an option to install a second CPU. I actually had a Pentium D at work, and it wasn't bad for that point in time. It had a giant heatsink with a 140 mm fan, but that was enough to keep it fairly quiet.The Pentium D was another poor example gluing chips too if I recall correctly.
I think the M1 Ultra stands out as the best-case scenario. It uses a purpose-built 2.5 GB/s interconnect for joining the two dies. It's highly-optimized and not just reusing a package-level interconnect like what Intel did with UPI or what AMD did with Infinity Link (over PCIe), in their first-gen EPYC.No question how they execute their link will extremely important on how well these chips perform and scale not to mention the potential heat issues from using older nodes.
Whether it's a performance win or just a space-saving way to hook the same 128-cores together that they could before, they'll definitely gain valuable experience from working with chiplets. So, I think the key point is the trajectory they're on, rather than how good this particular CPU will be.Correctly excuted though this could be quite the performance bump in their home grown chips. Or it could just end up being a hot mess... time will tell.