3 ms·

IBM's mainframes used to use that strategy.

• antaviana 7y ago
  I think they used hardware loops, not software loops, to reduce performance for the cheaper models.
• detaro 7y ago
  They still do that. Same with the POWER servers: you can buy one with "2 CPUs" that actually has more and then enable additional ones "on-demand".
  • jjeaff 7y ago
    How do they activate them on demand? Does it require phoning home?
    • detaro 7y ago
      Not sure, could also be just some locally checked license key you get from them if you buy the upgrade.