Betzy

Named after Mary Ann Elizabeth (Betzy) Stephansen, the first Norwegian woman to be awarded a doctorate degree.

The most powerful supercomputer in Norway

Betzy is a BullSequana XH2000, provided by Atos, and will give Norwegian researchers almost three times more capacity than previously, with a theoretical peak performance of 6.2 PetaFlops. The supercomputer is located at NTNU in Trondheim, and was set in production 24 November 2020. Betzy provides close to two billion CPU hours per year, and has a contracted operating time of four years (2024), with an optional one-year extension (2025).

Betzy has also gotten a GPU partition consisting of 4 nodes. Each node has 128 CPU cores, 512 GiB memory and 4 x Nvidia A100 GPUs with 40GB memory connected by NVLink.

Details	Betzy
System	BullSequana XH2000
Max Floating point performance, double	6.2 Petaflops
Number of compute nodes	1344
CPU type	AMD® Epyc™ 7742 2.25GHz
CPU cores in total	172032
CPU cores per node	128
Memory in total	336 TiB
Memory per node	256 GiB
GPU type	Nvidia A100 40 GB with NVLink
GPUs per node	4
GPUs in total	16
Operating System	Red Hat Enterprise Linux 7
Total disc capacity	2.5 PB
Interconnect	InfiniBand HDR 100, Dragonfly+ topology
Top500 June 2020	55th place @ 1250 nodes, 76% efficiency

Almost all components are liquid cooled resulting in a very high cooling efficiency, 95% of heat being captured to water.