Vega 20 Supports XGMI Based on Linux Patches
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Vega 20 Supports XGMI Based on Linux Patches
While it is true that currently our best knowledge on the Vega 20 GPU from AMD will be destined for compute applications, this first 7 nm GPU is still a source of some interesting news. Today it was spotted in Linux patches explicit support for XGMI for Vega 20. This technology is a high-speed, peer-to-peer interconnect, so it would allow multiple GPUs to work together and it is based on Infinity Fabric. Global Memory Interconnect, GMI, is already used for connecting the dies on Threadripper and EPYC CPUs from AMD with XGMI, inter-chip GMI, powering the connections between EPYC processors on multi-socket boards.
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Radeon Vega 20 Will Have XGMI - Linux Patches Posted For This High-Speed Interface
It has been expected that Vega 20 would feature XGMI as a high-speed GPU interconnect alternative to PCI Express and that was firmed up today thanks to a new set of AMDGPU Linux driver patches.
XGMI is a peer-to-peer high-speed interconnect and is based on Infinity Fabric. XGMI is basically AMD's alternative to NVIDIA's NVLink for inter-connecting GPUs. Previously leaked slides indicated that XGMI would be supported on Vega 20 along with PCI Express 4.0. That appears accurate as becoming public today were a set of patches wiring in XGMI support to the AMDGPU Direct Rendering Manager driver and explicitly enabling the functionality for Vega 20. It's also expected AMD's upcoming Naples server CPU architecture will also support XGMI.
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