- HPE unveils rack-scale system containing 81,920 CPU cores
- AMD Venice processors power HPE’s next-generation Cray infrastructure
- A 42U rack delivers unprecedented levels of compute density
At its recent HPE Discover 2026 event, the company unveiled new Cray GX5000 hardware featuring next-generation AMD EPYC Venice processors, with specifications that push server density well beyond current deployments.
The system combines multiple compute blades, liquid cooling infrastructure, networking hardware and memory resources in a single 42U rack configuration.
HPE has unveiled a Cray GX5000 configuration designed to deliver up to 81,920 CPU cores in a single rack.
Dense compute architecture increases rack capacity
The HPE Cray GX5000 platform follows the AMD EPYC 9965, a 192-core processor which represented one of the highest core-count AMD server processors before Venice arrived.
While the EPYC 9965 increases density at the processor level, the Venice-based system takes a broader approach by combining multiple processors, memory resources and cooling infrastructure in a single rack.
At the center of the system is the HPE Cray GX250a compute blade, which houses eight AMD EPYC Venice processors.
The compute blade integrates a power supply, liquid cooling channels, memory subsystems, storage devices, and networking components in a compact design.
HPE said a fully equipped rack can provide 81,920 CPU cores, although exact CPU configurations have not been disclosed.
Based on the rack specifications, the system would use 80 multi-node motherboards and could support up to 1.28 PB of RAM.
Each Venice processor connects to 16 memory channels, creating substantial memory bandwidth for large-scale computing workloads.
The memory modules themselves are liquid cooled and appear to use standard DIMM form factors.
Photographs from the event showed local Samsung E1.S EDSSF SSDs mounted on top of several CPU cold plates.
HPE representatives indicated that these drives serve as high-speed scratch storage for temporary data processing tasks.
Installed DRAM modules, storage devices, and node IDs suggest that the hardware displayed was operational rather than a non-functional demo unit.
This distinction is significant because earlier Venice demonstrations seemed closer to prototype systems than production-ready deployments.
Venice processors and networking define the platform
The rack integrates Slingshot 400 networking hardware, with HPE indicating future compatibility with Slingshot 800 technology.
Networking modules are mounted in side modules connected to processors via dedicated interfaces designed for high bandwidth communication.
The front-end network layout also simplifies cable management by changing the way optical connections are routed within the rack.
HPE also demonstrated a coolant distribution unit capable of handling 1.6 MW of cooling capacity for large installations.
These cooling requirements reflect the increasing power densities associated with modern high-performance computing infrastructure and increasingly complex processor designs.
AI tools, scientific simulations, technical analyzes and large LLM deployments are among the workloads requiring this level of compute density.
The company has not disclosed detailed specifications for AMD’s unannounced Venice processors, although available figures suggest an unusually high core count.
Calculations based on the rack’s stated capacity of 81,920 cores imply CPU densities far exceeding current EPYC generations.
Although AMD has not released specifications or performance figures for Venice, the projected core density of the HPE system has led to speculation that the processor could become one of the most powerful x86 processors produced.
A lot could change before the official launch, but the Cray GX5000 platform indicates that AMD and HPE are seeking higher compute density in the same rack footprint.
Via ServeTheHome
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