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Vega 20 Supports XGMI Based on Linux Patches

Category: Video Cards
Posted: 11:30AM
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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.

For a GPU destined for compute applications, such an interconnect makes sense, as NVIDIA has already demonstrated with its NVLink technology. Unfortunately we do not know if XGMI will need a special hardware connector between the cards or if it can be run over PCIe. We do know Vega 20 is supposed to support PCIe 4.0. Still, there is an intriguing possibility with XGMI on the GPU, and that is the potential for it to be leveraged to connect GPU and CPU, for the appropriate workload. That possibility is purely speculative at this point, but is still an interesting concept.

The expectation is for Vega 20-based products to launch later this year, but the only one known of is the Vega Instinct compute card, which is not meant for gaming.

Source: Phoronix



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