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Intel’s New Processor Architecture

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Intel’s New Processor Architecture. (The High-K gate). What we will be covering:. What is a transistor? What is “Leakage” Why is the High-K gate so great? The Nehalem Project (Core i7s) High-K gates 45nm technology Integration of memory controller. What is a transistor?.

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Presentation Transcript
what we will be covering
What we will be covering:
  • What is a transistor?
    • What is “Leakage”
    • Why is the High-K gate so great?
  • The Nehalem Project (Core i7s)
    • High-K gates
    • 45nm technology
    • Integration of memory controller

Andrew Egelhofer

what is a transistor
What is a transistor?
  • Does two things:
    • Acts as switches for digital logic – allows them to control a strong signal with a weak signal.
    • And amplifies the signal
      • Critical for cascading logic gates. Without amplification we would only be able to send it through ~3 gates before the signal becomes too “noisy”.
  • In the world of digital logic, AND and OR do not exist. Only NAND and NOR and NOT do.
    • You can create AND and OR by combining NAND and NOR and NOT.

Andrew Egelhofer

what does nand look like
What does NAND look like?
  • NAND:

Andrew Egelhofer

what does nor look like
What does NOR look like?
  • NOR:

Andrew Egelhofer

this brings us to leakage
This brings us to leakage
  • Example: NOT gate.
    • Even though A is high (+5 V) there is still some current to F.
    • This ties into thresholds

Andrew Egelhofer

new high k gates
New High-K gates
  • "High-k" stands for high dielectric constant.
  • “Old” transistors use silicon dioxide to make their transistors.
  • “New” High-K transistors use hafnium dioxide for their transistors.
    • Because high-k gate dielectrics can be several times thicker, they reduce gate leakage by over 100 times compared to “old” transistors.
    • Runs cooler: cooler = more power.

Andrew Egelhofer

core i7s
Core i7s
  • High-K gates allows intel to pack more transistors into a die.
    • More room for more stuff. Like a memory controller.
  • Integrate memory controller directly onto the processor.
    • AMD already has been doing this for 5 years
  • Faster transfer time between memory and processor now (no more Front Side Bus)
    • No more intermediate device.

Andrew Egelhofer

what is front side bus
What is Front side Bus?

Andrew Egelhofer

references
References
  • Intel: http://www.intel.com/technology/silicon/high-k.htm
  • Wikipedia: http://en.wikipedia.org/wiki/Transistor
  • Our Book: Computer Architecture and Organization: An Integrated Approach

Andrew Egelhofer

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