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Intel Corporation Message Board

  • alexander.dumbass alexander.dumbass Apr 30, 2013 11:36 PM Flag

    Intel Haswell Power consumption TOO LOW for power supplies.

    Skylake 14nm CPU will generate power and can pair with Haswell for infinite operation without requiring a battery.

    Intel Haswell low power states could require a new PSU
    If you get your freak on by an extreme low power state you may need to get a new power supply if you want to use the new C6/C7 low power states of Intel's upcoming Haswell processors. These new power states require a power supply that can maintain a minimum current load of 0.05A on the CPU exclusive 12V2 rail.

    The previous ATX12V v2.3 design guidelines called for a minimum load of 0.5A on the CPU power rail, so a lot of older and budget power supplies will likely not meet the new specification, resulting in stability or shutdown issues once the system enters the C6/C7 power state.

    Unfortunately, there's no way to know which power supplies are fully Haswell compliant as PSU manufacturers do not usually report the minimum load on their specification sheets.
    Older or bargain basement power supply units may be unable to achieve this, and might become unstable or trigger a UVP/OVP shutdown once the system enters the C6/C7 power states. This is because the previous ATX12V v2.3 design guidelines for Ivy Bridge and its predecessors only called for a minimum load of 0.5 Amps on the CPU power rail, hence a less sophisticated internal feedback loop/protection could be used in older or cost-reduced offerings, which will not support the new standards.

    Most worryingly, PSU manufacturers (even the enthusiast grade ones) do not usually report the minimum load on their spec sheets, so it is virtually impossible for us to come up with a list of supported units at this time. To ensure a smooth transition, mainboard designers and system integrators have been told to implement a BIOS-level toggle to enable/disable the new C6/C7 power states.

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    • This is funny. Haswell will be big. Search north cape. Think lighter surface pro with 10 hours battery life. Will sell like crazy

    • IBM surprises with 22nm details at IEDM »
      you never know about Intel and what and why they are doing certain things.....

      Intel Foundries MEMS for Fuel Cell Start-up Nectar
      By #$%$ James
      In the last couple of years there have been announcements that Intel will be acting as a foundry for FPGA company Achronix , PLD maker Tabula and programmable network processor provider Netronome , as well as much speculation about making chips for Apple.

      All these reports refer to using Intel’s leading-edge 22-nm tri-gate process. However, at CES a couple of weeks ago, my eye was caught by a 200-mm wafer on display at the booth of a little company called Nectar , who were pitching their fuel-cell based USB charging system. They claim that the charger can top up an iPhone battery at least ten times before the fuel pod has to be changed. The whole device can be held in one hand:
      Fig. 1 Nectar fuel-cell charger (at right) on display at CES

      The cell uses butane fuel in a silicon-based power cell, and by the look of the image below the cells are ~22 mm square.
      Fig. 2 Nectar MEMS wafer on display at CES

      The press pack given out at the show includes a paper [1] with a description of the technology; a solid oxide fuel cell (SOFC) is used, which is compatible with silicon processing. I’m not a fuel cell expert, so to quote from the paper:

      "Fuel cells operate by creating opposing gradients of chemical concentration and electrical potential. When an ion diffuses due to the concentration gradient, the associated charges are transported against the electric field, generating electrical power. In the case of SOFCs, the mobile ion is O2-, and the oxygen gradient is created by providing air on one side (the cathode) and a fuel mixture which consumes any free oxygen on the other side (the anode). Any fuel which burns oxygen will produce power in an SOFC." The schematic below (Fig. 3) illustrates the process.

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