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Thread: News - AMD needs more than Shanghai Opterons to win server battle

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    News - AMD needs more than Shanghai Opterons to win server battle

    AMD creates buzz around Shanghai at SC08, but the company's window of opportunity is small.
    Read more.

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    Re: News - AMD needs more than Shanghai Opterons to win server battle

    Quote Originally Posted by Agent View Post
    ...every time Creative bring out a new card range their advertising makes it sound like they have discovered a way to insert a thousand Chuck Norris super dwarfs in your ears...

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    Re: News - AMD needs more than Shanghai Opterons to win server battle

    Quote Originally Posted by aidanjt View Post
    Yes.

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    Re: News - AMD needs more than Shanghai Opterons to win server battle

    Quote Originally Posted by directhex View Post
    Yes.
    Is that one of those "Jesus, I don't know what to do with all this compute power" performance issues?
    Quote Originally Posted by Agent View Post
    ...every time Creative bring out a new card range their advertising makes it sound like they have discovered a way to insert a thousand Chuck Norris super dwarfs in your ears...

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    Re: News - AMD needs more than Shanghai Opterons to win server battle

    Quote Originally Posted by aidanjt View Post
    Is that one of those "Jesus, I don't know what to do with all this compute power" performance issues?
    Float performance is crap compared to Xeon. It's a problem Barcelona was meant to fix, and didn't

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    Re: News - AMD needs more than Shanghai Opterons to win server battle

    Quote Originally Posted by directhex View Post
    Float performance is crap compared to Xeon. It's a problem Barcelona was meant to fix, and didn't
    Does this fp math disadvantage mean with the FPU, or SSE?..
    Quote Originally Posted by Agent View Post
    ...every time Creative bring out a new card range their advertising makes it sound like they have discovered a way to insert a thousand Chuck Norris super dwarfs in your ears...

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    Re: News - AMD needs more than Shanghai Opterons to win server battle

    Quote Originally Posted by aidanjt View Post
    Does this fp math disadvantage mean with the FPU, or SSE?..
    With the FPU. With Santa Rosa, float performance is about half (!) woodcrest, per cycle per core. Well, on paper anyway (obviously in real life it's not that big a gap). Barcelona increased the theoretical float performance from 2 FLOPs/cycle to 3 - but due to design cock-ups, about 20% of that total performance is lost. Xeon has consistently had 4 FLOPs/cycle (as long as they're the right kind of FLOPs, anyway) since Woodcrest landed, with only the same memory bandwidth problems Xeon's always had causing issues. On purely RAM-bound codes, Opteron DOES tend to do better.

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    Re: News - AMD needs more than Shanghai Opterons to win server battle

    Quote Originally Posted by directhex View Post
    With the FPU. With Santa Rosa, float performance is about half (!) woodcrest, per cycle per core. Well, on paper anyway (obviously in real life it's not that big a gap). Barcelona increased the theoretical float performance from 2 FLOPs/cycle to 3 - but due to design cock-ups, about 20% of that total performance is lost. Xeon has consistently had 4 FLOPs/cycle (as long as they're the right kind of FLOPs, anyway) since Woodcrest landed, with only the same memory bandwidth problems Xeon's always had causing issues. On purely RAM-bound codes, Opteron DOES tend to do better.
    Seriously?.. Odd, I thought AMD were already up to 4ops/cycle in native mode. Hrmm...

    Anyway, you can't really wince at the aforementioned Cray XT5, they just keep scaling.
    Quote Originally Posted by Agent View Post
    ...every time Creative bring out a new card range their advertising makes it sound like they have discovered a way to insert a thousand Chuck Norris super dwarfs in your ears...

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