The 4 Racks of 180x compute, 4x high memory and 4x accelerator nodes which form part of Viper
These racks contain the storage which is 0.5 Petabyte or 500 TeraByte (second rack from the right).
Next (in the nearest rack, top to bottom) is two high availability controller nodes, two login nodes and a further two visualisation nodes.
This is the rear of one of the compute racks, which show the high speed Intel OmniPath connections (thick black cable) which operates up to 100 Gb/s, the blue connectors are 1 Gb/s ethernet management network and power connections (thinner black cables) running down the centre of the picture.