A HyperComputer (HC-62) with 11 Xilinx  Virtex-II  FPGAs (From   StarBridge)

 Star Bridge Systems HyperComputers employ FPGAs that can serve as computational engines. In contrast to conventional microprocessors that have fixed hardware capabilities and can perform general-purpose tasks, FPGA-based computing systems retain the execution speed of dedicated hardware but also have a great deal of flexibility to tune the architecture at runtime to match the specific characteristics of applications, resulting in much higher utilization of silicon and better performance.
 

FPGAs: XC2V6000 (Specifications)