Woodcrest
2048 Woodcrest cores are provided by 512 dual socket Dell PowerEdge 1950 1U rack mount server nodes. Each node consists of two 3.00 GHz dual core Intel Woodcrest processors
Westmere
1536 Westmere cores are provided by 128 dual socket Dell PowerEdge M610 half-height blade servers. Each node consists of two 2.67 GHz six core Intel Westmere processors
Tesla (GPU subcluster)
128 GPUs/256 Nehalem cores are provided by 32 dual socket Dell T5500 servers. Each server is connected to one Tesla S1070 unit, each containing 4 GPUs (CUDA compute capability=1.3). Each node consists of two 2.67 GHz four core Intel Nehalem processors, giving eight cores in total