These pictures are taken on the same floor, but just one floor below in this building there is another computer grid, similar to this one but a bit smaller. At that grid, there are, if I remember correctly, more advanced (Intel's xeon, AVX512 etc.) CPU architectures are operating. In the very same floor there are also robotic arms that access offline/long stored hard-drives per user request, which always seems pretty amazing to me. (Disclaimer: I was intern at CERN.)