Hyper-threading was supported by the 3.06 GHz processor thus enabling multiple threads to be run together. This could be attained by duplicating some parts of the processor and letting the operating system feel that there are two logical processors. This was present in all Northwood CPUs. But for the 3.06GHz model, this was disabled in the core in the rest of it.
The outcome of over-clocking Northwood cores resulted in a startling phenomenon. The processor was close to dead when VCore was pushed past 1.7v. From then on this incidence was called "NDS" or Northwood Death Syndrome.
Although Bus frequency on a Northwood is 100 MHz, because the processor uses Quad Data Rate bus the effective bus speed is 400 MHz.
