Last week, we covered the AMD Instinct MI200 and how AMD is claiming it offers a 4.9x speedup in some FP64 workloads over the NVIDIA A100. This week is Supercomputing 2021 and STH is on-site. We have a look at the AMD Instinct MI250X.
Behold the AMD Instinct MI250X OAM at SC21
AMD’s booth at the show looked like many others. The space was still open with a few chairs. Instead of the large display of EPYC and GPU systems, AMD had some printed banners in the background, branding for the ~3,000 attendees (SC19 was closer to 14,000 for scale.) It seems as though the relatively bare both with printing is common with many companies that did not send large delegations due to the pandemic.
What was different with AMD’s booth is that they had a HPE Cray EX235a node on full display. This node showed an AMD EPYC-based system with the new MI200 series GPUs/ accelerators. The node also had the HPE Slingshot interconnect.
HPE’s placard said that this is the AMD Instinct MI250X so that is what we are tagging this as. There are the main two compute dies each with four HBM stacks around them.
In AMD’s architecture these have an interconnect between them so we have two compute dies and eight of these HBM stacks on the package.
One can see the liquid cooling plates on all of the main components of the OAM GPUs. Also the PCBs for the Slingshot interface on the CPU side.
The tray has two CPUs each with four OAM accelerators from what we saw.
AMD/ HPE did not specifically disclose which EPYC CPU is in this node, so we do not know if it is Trento or something else. All we can see is that this is still an 8-channel memory CPU (based on the RAM coolers) and so it is likely a Milan-era design.
There is a not a lot of hardware here at SC21, so expect coverage to be muted compared to a normal year. Not having Dell, Lenovo, Intel, AMD (really), NVIDIA, Arm and others here is taking its toll. The companies that are here have generally much more sparse displays than a normal year, so it is hard to even find a lot of HPE/ Cray hardware even though HPE is here.
Also as a quick one, I am sending these photos to Ian Cutress at AnandTech (he asked) so you may see them over there in a bit as well.