ES chip with 3.3GHz boost clock, 420W max turbo power, 764W BIOS limit

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Next-Gen Intel Xeon Processor Rumors of Emerald Rapids, Granite Rapids, and Diamond Rapids: Up to 144 Lion Cove Cores by 2025 1

The latest 4th Gen Sapphire Rapids-SP Xeon processor with its multi-chip design hosting Compute & HBM2e tiles. (Image credit: CNET)

The latest Intel Sapphire Rapids-SP Xeon processor with 56 Golden Cove cores has been discovered by Yuuki_ans. This chip is still an engineering sample, but it comes with much higher power numbers than those we discussed previously.

Intel’s Sapphire Rapids-SP 56 Core processor sample runs up to 3.3GHz in ES state, draws an insane 420W of power at MTP and 764W peak limit

ES2 processors also leaked and we saw boost frequencies of up to 3.3 GHz, but this sample had a TDP of 270 W. The last sample should be Xeon Platinum 8476 or Platinum 8480 and rocks a total of 56 Golden Cove cores with 112 threads. The processor contains 112 MB of L2 cache and 105 MB of L3 cache. The processor was tested on an Intel C741 (Emmitsburg) platform with 1TB of DDR5 memory with CL40-39-38-76 timings.

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The Intel Sapphire Rapids-SP Xeon processor with 56 cores was spotted in the latest leak by Yuuki_ans.

The Intel Sapphire Rapids-SP Xeon processor with 56 cores was spotted in the latest leak by Yuuki_ans.

As for clock speeds, the Intel Sapphire Rapids-SP Xeon processor ran at a base clock speed of 1.9 GHz and a boost clock speed of 3.3 GHz. The processor has a maximum single-core boost clock of 3.7 GHz. The power figures are where things get crazy as the processor running on the Socket E motherboard (LGA 4677) has a base TDP of 350W (PL1) and maximum turbo power (PL2) rated at an insane 420W. But that’s not all, the actual CPU power limit (enforced by the BIOS) is reported at 764W, which could be the case with AVX-512 enabled.

Intel Sapphire Rapids-SP Xeon processor clock and power profiles (Image credits: Yuuki_ans):

As for proper chip operation, the Intel Sapphire Rapids-SP Xeon processor can operate at 99°C, although we don’t know what kind of cooling was used to test this chip. Keep in mind that the load has not been applied to the chip. While early performance benchmarks look pretty decent compared to AMD EPYC Milan, the processor will launch at a time when Genoa is at its peak, and based on the power numbers here, things aren’t looking good for Intel in the efficiency department. We know the final samples will retain the power limits, but they might offer better thermal and power management than the engineering samples. But whether or not that’s enough to tackle AMD’s EPYC lineup remains to be seen.

Intel Xeon SP Families:

Family branding Skylake-SP Lac Cascade-SP/AP Cooper Lake-SP Ice Lake-SP sapphire rapids emerald rapids granite rapids Diamond Rapids
Process node 14nm+ 14nm++ 14nm++ 10nm+ Intel 7 Intel 7 Intel3 Intel 3?
Platform name Intel Purley Intel Purley Intel Cedar Island Intel Whitley Intel Eagle Stream Intel Eagle Stream Intel Mountain Stream
Intel Birch Stream		 Intel Mountain Stream
Intel Birch Stream
Basic Architecture celestial lake Cascades Lake Cascades Lake sunny cove golden cove Raptor Cove Redwood Bay? Lion’s Cove?
Improved CPI (Vs Prev Gen) ten% 0% 0% 20% 19% 8%? 35%? 39%?
References MCP (Multi-Chip Package) Nope Yes Nope Nope Yes Yes To be determined (maybe yes) To be determined (maybe yes)
Plug LGA 3647 LGA 3647 LGA 4189 LGA 4189 LGA 4677 LGA 4677 To be determined To be determined
Maximum number of cores Up to 28 Up to 28 Up to 28 Up to 40 Up to 56 Up to 64? Up to 120? Up to 144?
Maximum number of threads Up to 56 Up to 56 Up to 56 Up to 80 Up to 112 Up to 128? Up to 240? Up to 288?
Max L3 Cache 38.5 MB L3 38.5 MB L3 38.5 MB L3 60 MB L3 105 MB L3 120 MB L3? 240 MB L3? 288 MB L3?
Vector engines AVX-512/FMA2 AVX-512/FMA2 AVX-512/FMA2 AVX-512/FMA2 AVX-512/FMA2 AVX-512/FMA2 AVX-1024/FMA3? AVX-1024/FMA3?
Memory Support 6 channel DDR4-2666 DDR4-2933 6 channels Up to 6 DDR4-3200 channels Up to 8 DDR4-3200 channels Up to 8 DDR5-4800 channels Up to 8 channels DDR5-5600? Up to 12 DDR5-6400 channels? Up to 12 DDR6-7200 channels?
PCIe generation support PCIe 3.0 (48 lanes) PCIe 3.0 (48 lanes) PCIe 3.0 (48 lanes) PCIe 4.0 (64 lanes) PCIe 5.0 (80 lanes) PCIe 5.0 (80 lanes) PCIe 6.0 (128 lanes)? PCIe 6.0 (128 lanes)?
TDP range (PL1) 140W-205W 165W-205W 150W-250W 105-270W Up to 350W Up to 375W? Up to 400W? Up to 425W?
Xpoint Optane 3D DIMMs N / A Apache pass Barlow Collar Barlow Collar Raven Pass Raven Pass? Donahue Pass? Donahue Pass?
Competition AMD EPYC Naples 14nm AMD EPYC Rome 7nm AMD EPYC Rome 7nm AMD EPYC Milan 7nm+ AMD EPYC Genoa ~5nm AMD Next-Gen EPYC (after Genoa) AMD Next-Gen EPYC (after Genoa) AMD Next-Gen EPYC (after Genoa)
To throw 2017 2018 2020 2021 2022 2023? 2024? 2025?

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