Obviously, the following solutions may be out of date:

1) Based on data from the TOP500 list, the approximate time should be slightly greater than 1 year.

2) Depending on the products analyzed, the difference should be somewhere between 50 and 80 GB/s.

3) Although little specific information was released on Larrabee's capabilities, these statistics (depending on the number of cores assumed) can be used to arrive at some range of between 100 and 1000 Gb/s. Utilizing data that, at the time of this writing, is current, Western Digital's VelociRaptor transfer rate is approximately 3.0 Gb/s. At this rate, it would take somewhere between 30 and 300 drives, depending on the number of cores assumed to be present.

4) Depending on whether Average CPU Power (ACP) or Thermal Design Power (TDP) is considered, answers may differ slightly. Based upon the Green500 List, as of November 2010, the SC Blue Gene (at 1684.20 MFLOPS/W) is the most efficient high-performance computer. Perhaps the most power-efficient GPU is the ATi FirePro V7800 (at about 2.92 GFLOPS/W). Note that these answers may have changed by the time this solution becomes available.