Based on Super Micro's SuperServer SS6016XT server, Boston Venom F1000-4 packs four AMD FireStream 9250 GPGPU cards. Each of the cards has 1 TFLOPS of single-precision and 250 GFLOPS of double-precision computing power, e.g. F1000-4 packs 1TFLOPS of dual-precision power (4TFLOPS SP).
The important part is that this server fits the 1U format, e.g. a standard 21U and 42U racks could see anywhere between 84 and 168 FireStream accelerating cards, making a very solid platform for supercomputer performance - 42U rack brings 168 TFLOPS of single-precision and 42 TFLOPS of dual-precision performance. After four GPGPUs are installed, there is one remaining expansion slot - you can use it for putting the 10Gb Ethernet card or an Infiniband controller. System management is already covered with on-board IPMI 2.0 interface [supports KVM over LAN].
Photo courtesy of GPU Cafe