Intel Xe High Performance Computing GPUs will use Chiplets
takyon writes:
Intel's Xe for HPC: Ponte Vecchio with Chiplets, EMIB, and Foveros on 7nm, Coming 2021
Today is Intel's pre-SC19 HPC Devcon event, and with Raja Koduri on stage, the company has given a small glimpse into its high-performance compute accelerator strategy for 2021. Intel disclosed that its new hardware has the codename 'Ponte Vecchio' and will be built on a 7nm process, as well as some other small interesting bits.
[...] For high-performance computing, the presentation highlighted three key areas that the Xe architecture will be targeting. First is a flexible data-parallel vector matrix engine, which plays into the hands of AI acceleration and AI training in a big way. The second is high double precision (FP64) throughput, which has somewhat been disappearing of late due to reduced precision AI workloads, but is still a strong requirement in traditional HPC workloads like, weather, oil and gas, and astronomy. (We should point out that the diagram shows a 15x7 block of units, and Intel's Gen architecture uses 7 threads per execution unit.) The third tine in this trident is that Intel's HPC efforts will have a high cache and memory bandwidth, which the slides suggest will be directly coupled to individual compute chiplets ensuring a fast interconnect.
So in this case, enter Ponte Vecchio, named after the bridge that crosses the river Arno in Florence, Italy. This will be Intel's first 'exascale class' graphics solution, and is clearly using both chiplet technology (based on 7nm) and Foveros/die stacking packaging methods. We further confirmed after our call, based on discussions we had with Intel earlier in the year, that Ponte Vecchio will also use Intel's Embedded Multi-Die Interconnect Bridge (EMIB) technology, joining chiplets together. Pulling all the chips into a single package is fine, meanwhile GPU-to-GPU communication will occur through a Compute eXpress Link (CXL) interface, layered on top of PCIe 5.0.
Intel's 2021 Exascale Vision in Aurora: Two Sapphire Rapids CPUs with Six Ponte Vecchio GPUs
As part of today's announcement, Intel has put some information on the table for a typical 'Aurora' [supercomputer] compute note. While not giving any specifics such as core counts or memory types, the company stated that a standard node will contain two next generation CPUs and six next generation GPUs, all connected via new connectivity standards.
Those CPUs will be Sapphire Rapids CPUs, Intel's second generation of 10nm server processors coming after the Ice Lake Xeons. The announcement today reaffirmed that Sapphire Rapids is a 2021 processor; and likely a late 2021 processor, as the company also confirmed that Ice Lake will have its volume ramp through late 2020. Judging from Intel's images, Sapphire Rapids is set to have eight memory channels per processor, with enough I/O to connect to three GPUs. Within an Aurora node, two of these Sapphire Rapids CPUs will be paired together, and support the next generation of Intel Optane DC Persistent Memory (2nd Gen Optane DCPMM). We already know from other sources that Sapphire Rapids is likely to be DDR5 as well, although I don't believe Intel has said that outright at this point.
See also: Intel Xe GPU Architecture Detailed - Ponte Vecchio Xe HPC Exascale GPU With 1000s of EUs, Massive HBM Memory, Rambo Cache
AnandTech Exclusive: An Interview with Intel's Raja Koduri about Xe
Read more of this story at SoylentNews.