gorkonapple said:
This is the problem. EVERYONE has been assuming that the 90nm part should run cooler then the earlier chip, yet I think that is assuming too much. Assuming this, then yes...Powerbook G5's may yet be close on the horizon....yet my bet is Apple wants a G5 Powerbook to be as fast as a desktop and quite possibly be the first EVER to bring out a dual processor laptop. This is DEFINITELY something Apple would LOVE to do as it's a virtual impossibility with PC hardware and close to that with the G5. Apple likes to Think Different and I as well as many others on the net have been hoping for a portable that works as fast as the desktop with no compromises. This includes the first ever portable SMP system.
This is what goes through my mind coming from an Mech. Engineering perspective.
Known: Conductive Heat Transfer clearly shows that the more current required to power a surface area the greater amount of heat that black body surface will emit.
Assumptions: SMP in the form of dual or quad processor workstations. Single or Dual SMP laptops are a requirement for the business model.
Experimentations: The Convective Heat Transfer of this volumetric housing for the Workstation will require a flow increase from fans to move the increased amount of conductive heat transfer these processors will produce. For a single CPU this is not an issue because the system will emit lower amounts of heat dissipation than the prior 970 CPU.
The cost of these systems must be the same or less than their predecessors at similiar configurations, in order to be competitive within the market.
The time to market cannot be delayed too long in order to maintain a positive market perception.
Suppliers have to be able to provide parts in quantities that are on par or greater than those supplied for the current system configurations, assuming a market growth curve.
Acceptable heat measurements have to be tested, in various work environments to determine the feasibility of hardware designs that will house these new CPUs.
In the end, if the market pressure to roll out new systems supercedes the option of Quad Processor Systems than a fallback design has to be rolled out, in place of the desired configuration, until such systems exceed the Factors of Safety (FS) required of them for end user consumption.