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AMD Downgrades Bulldozer Transistor Count By 800 Million

Posted by timothy on from the but-who's-counting-is-the-actual-question dept.

Robadob writes "It has come to light that AMD PR had originally reported that the new Bulldozer processor's transistor count was 2 billion. AMD PR are now asking reviewers to correct this count to 1.2 billion from the original amount they provided ~3 months ago."

5 of 149 comments (clear)

  1. Why? by RobinEggs · · Score: 5, Interesting

    I understand the importance of truth in advertising, but is this information meaningful, or just an insignificant correction? The magnitude of the difference alone doesn't automatically make this an important story, or the exposure of some big, inexcusable lie by AMD.

    What's the true relevance of transistor count? If I see two processors with identical performance and power efficiency but radically different transistor counts do I have any real world incentive to select one over the other? I mean, presumably the one with fewer transistors in roughly the same die space might overclock better, might have a longer MTBF, etc., but beyond that should I care?

    Or did timothy post this just to keep up the fanboi flame wars?

    1. Re:Why? by rbmyers · · Score: 5, Interesting

      Bulldozer has apparently been a disappointment. Why? One wonders. One suspects that AMD encountered some late-in-the-game, unexpected, and very unpleasant surprises. Maybe 2 billion is closer to the number they wanted it to have. Sounds more and more like the NetBurst Story. Intel never did figure out how to add in enough transistors to make the design work well without breaking the power budget. Robert.

    2. Re:Why? by icebike · · Score: 4, Interesting

      Or maybe 2billion is what the thing actually has, but in order to get it to work they had to abandon a significant portion even if they still exist on the chip.
      It wouldn't be the first time unused banks of memory were left on chip but simply abandoned.

      --
      Sig Battery depleted. Reverting to safe mode.
    3. Re:Why? by realityimpaired · · Score: 4, Interesting

      What's the true relevance of transistor count? If I see two processors with identical performance and power efficiency but radically different transistor counts do I have any real world incentive to select one over the other? I mean, presumably the one with fewer transistors in roughly the same die space might overclock better, might have a longer MTBF, etc., but beyond that should I care?

      If you can find one processor with 2 billion transistors, and another with 1.2 billion, and they both draw exactly the same power requirements, performance, instruction set, and have the same heat envelope, then either somebody in marketing is lying, or somebody is doing something horribly wrong. On the one hand, it should not take 2 billion transistors to do something that can be done with 2/3 of that, but on the other hand, if you have 1/3 fewer transistors, you should experience an according decrease in heat leakage.

      That being said, numbers like transistor count matter to enthusiasts. These are the same people who used to spend $1000 to buy the 3.8GHz P4 chip instead of the $300 3.4GHz chip. For some folks on the market, bigger == better, and there's no point in trying to explain to them that they can accomplish the same job with a less powerful chip. Some people build/buy/upgrade computers so that they can brag about being more powerful than their buddies, and when you couple that mentality with a disposable income, well, you know the rest.

      For somebody like me, it's not likely to make a big difference. But I'm typing this on a laptop that's powered by a Celeron U3600 ULV chip... a dual core 1.2GHz processor that's designed for low power consumption, not high performance. It's been a long time since I have built/bought a high performance system, and I'm unlikely to get back into that game for a while: I gave up on computer gaming years ago. The one thing in this announcement that may give me pause next time I build a system is that a revision from 2 billion to 1.2 billion transistors probably means some kind of manufacturing problem that they thought they could overcome, but are now not thinking they can. Even if that's not the case, AMD is going to have egg on their face a while over this one.

  2. There's a new update by Anonymous Coward · · Score: 4, Interesting

    AMD just clarified that Bulldozer does have 2 billion transistors after all, but only 1.2 billion work. Which explains something about its performance.