Together with new reference platforms CGX, HGX and OVX based on its own Grace Arm-chips, NVIDIA introduced another modification of the PCIe version of the accelerator as part of Computex 2022 A100 (80 GB), this time with a pre-installed water block for connection to the LSS. The novelty will become available in the III quarter of this year, and a similar modification of the accelerator will appear at the beginning of the next NVIDIA H100.
What is interesting here is not so much the fact of using LSS (for the PCIe version of the A100, water blocks are produced, for example, EK Water Blocksand HGX platforms with liquid cooling, SXM versions of accelerators are not so few), but an unexpectedly large list of partners ready to offer systems with a new modification of the A100: ASUS, ASRock Rack, Foxconn, GIGABYTE, H3C, Inspur, Inventec, Nettrix, QCT , Supermicro, Wiwynn and xFusion.
In this case, LSS is needed primarily not to significantly increase performance, as is usually the case in HPC systems, but to increase the density of computing power and improve energy efficiency. The novelty takes up only one slot, which, according to NVIDIA, can reduce the number of racks used by two-thirds while maintaining the same level of performance. Along the way, you can reduce energy costs by almost a third.
True, NVIDIA in its statements relies not only on its own calculations, but also on the work of Equinix, one of the world’s largest data center operators, which hosts the capacities NVIDIA Launchpad and which, in January of this year, created a dedicated space to study energy efficiency issues. Within the framework of this project, LSS are also studied.
According to NVIDIA, the use of LSS within the entire data center allows you to achieve a PUE of 1.15, while for a traditional air-cooled data center this figure is 1.6, that is, the difference is just about a third. A similar result was obtained with Equinix. According to the Uptime Institute for 2020, world average PUE was 1.59. For Equinix campuses, the average PUE is 1.48, and for the newest sites it is less than 1.2.
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