Intel Sapphire Rapids CXL with Emmitsburg PCH Shown at SC21


Intel Eagle Stream Sapphire Rapids Development Platform CXL Front
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL Entrance

At SC21 we have been handled to one thing particular. With CXL 1.1 era chips like Intel’s upcoming Sapphire Rapids Xeons coming, the business is tough at work enabling the brand new options and performance. At SC21 we had the chance to look contained in the Intel Eagle Stream growth platform with the Emmitsburg chipset and Archer Metropolis RP motherboard to see what we could get within the subsequent era. Except for the {hardware}, the demonstration of working CXL on a next-gen platform designed for creating CXL was in all probability an important business demo at SC21.

Intel Sapphire Rapids CXL with Emmitsburg Proven at SC21

The demo was collectively being proven on the CXL sales space at SC21 by Astera Labs, Intel, and Synopsys. For individuals who are unfamiliar, Astera Labs is making CXL retimers, reminiscence interfaces, and extra. Synopsys is a serious IP and validation participant within the business. Intel is… Intel.

Intel Eagle Stream Sapphire Rapids Development Platform CXL Synopsys And Astera Labs
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL Synopsys And Astera Labs

On the entrance of the system, we are able to see a big fan array on high in addition to 16x 2.5″ bays on the underside. Once more, it is a growth platform, not one thing extra meant for deployment just like the Flex Bodega Bay Sapphire Rapids System proven at OCP Summit 2021.

Intel Eagle Stream Sapphire Rapids Development Platform CXL Front
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL Entrance

For individuals who need to know what’s on that label:

  • Market Phase: Intel SDP for Xeon-SP
  • Platform: Eagle Stream
  • Processor: Sapphire Rapids ES1/B0
  • Chipset: Emmitsburg
  • Board Identify: Archer Metropolis RP
  • Part: Alpha

Emmitsburg is the chipset or PCH. We began seeing it present up as a codename a number of years in the past, however that is maybe the primary official Intel displaying that it’s formally the PCH codename for Sapphire Rapids. This can substitute the Lewisburg (LGA3647) and Lewisburg Refresh (third Gen/ LGA4189) era of PCH’s for Intel’s server line.

As one can see, we now have a dual-socket system that was really operating on the present.

Intel Eagle Stream Sapphire Rapids Development Platform CXL CPUs And Memory Under A Shroud
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL CPUs And Reminiscence Beneath A Shroud

The big black field somebody instructed me was the Synopsys check field. For these questioning, sure it’s sitting on foam suspending it from the motherboard. Once more, this will have regarded like a humble demo, nevertheless it was maybe an important for next-generation servers.

Intel Eagle Stream Sapphire Rapids Development Platform CXL Rear 3
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL Rear 3

The view of the CPU and reminiscence space confirms that we now have 2 DIMMs Per Channel (2DPC) 8-channel reminiscence. We are able to additionally see that the retention mechanism is much like the present resolution (we have been instructed it isn’t the identical.) If you wish to get an concept of how this works, you may try our piece: Putting in a third Technology Intel Xeon Scalable LGA4189 CPU and Cooler.

A number of different factors to notice right here. First, we are able to see a brief copper heatsink under the black field and subsequent to the froth. This must be protecting the Emmitsburg PCH. The PCIe card we are able to see within the PCIe Gen5 x16 slot is there for the CXL demo that’s being performed right here.

Intel Eagle Stream Sapphire Rapids Development Platform CXL Rear 2
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL Rear 2

Solely one of many 1.6kW PSUs was plugged in. One also can see numerous community ports, USB ports, and show outputs. On these kind of growth platforms, this I/O is commonly fairly tough however it’s important because it helps deliver up new methods.

As a part of the demo, we are able to see the CXL hyperlink occurring on port pxp2.pcieg5.port0 (CXL) right here.

Intel Eagle Stream Sapphire Rapids Development Platform CXL And 80x PCIe Lanes
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL And 80x PCIe Lanes

Additionally, there may be an attention-grabbing tidbit since this was one in all, if not, the primary time the PCIe Gen5 system was proven off publicly. Right here we are able to see:

  • DMI is x8
  • PXP1 is x16
  • PXP2 is x16
  • PXP3 is x16
  • PXP4 is x4 — x4 — x4 — x4 —
  • PXP5 is x4 — x4 — x4 — x4 —
  • Port pxp0.pcieg4.dmi is x8

Utilizing the primary six traces we see the DMI x8 hyperlink for connecting to the Emmitsburg PCH. We additionally see 5 PCIe Gen5 ports, all with sixteen lanes. Three are x16. Two are bifurcated into 4 x4 hyperlinks. Only for reference, right here is that this summer season’s Structure Day 2021 slide on the PCIe connectivity on the 4 compute die resolution:

Intel Architecture Day 2021 Sapphire Rapids SoC IO Advancements
Intel Structure Day 2021 Sapphire Rapids SoC IO Developments

After all, the large purpose that that is thrilling is that it’s displaying a 2022 server operating CXL as a part of the demo.

Intel Eagle Stream Sapphire Rapids Development Platform CXL Running
Intel Eagle Stream Sapphire Rapids Improvement Platform CXL Operating

If you wish to be taught extra about why CXL is essential, try Compute Categorical Hyperlink or CXL What it’s and Examples.

I requested Raja Koduri throughout our Raja’s Chip Notes Lay Out Intel’s Path to Zettascale dialogue and he mentioned that CXL will develop into extra essential within the HPC realm round CXL 3.0. CXL 3.0 shouldn’t be official but, so it may very well be known as CXL 2.5 or one thing, however everybody on the present was simply calling it CXL 3.0.

Closing Phrases

SC21 was a lot smaller, nevertheless it nonetheless had some gems. On this demo, we bought to see among the essential work occurring to allow CXL, a know-how that may change the business eternally. We additionally bought to see the Sapphire Rapids platform with the Emmitsburg PCH in motion together with the PCIe configuration as a part of the Astera Labs, Synopsys, and Intel demo.

If you wish to see a bit extra through a video, this was really featured in our High 10 Showcases of SC21 video. There you might be able to see a number of extra angles of this superior demo.

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