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  1. #11
    Xtreme 3D Team
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    Quote Originally Posted by Andi64 View Post
    Shouldn't an hypothetical Phenom II X8 @ 4.8Ghz score between 10 a 10.5 points in CB11.5?
    Quote Originally Posted by Manicdan View Post
    the old architecture gets about .3 pts per ghz per core, round down a little for inefficiencies

    so up to 8.4pts at 3.6ghz for an octo PII
    11.3 pts for 4.8ghz

    keep in mind that in the CB11.5 thread weve seen a half point spread even at the same ghz. but we also see people getting mid 7pts in mid 4ghz. so these results look bad
    You guys seem to have missed what chew said...
    1. Bulldozer functions like a 4 core that is able to execute 8 threads. You get roughly 5x scaling in CB from one to eight cores. (Better than HT) I don't care what PR tells you, that's how it works. (Unless new charts have come out with magical 7.x scaling?)
    2. You have two options with the "STARS" core.
    ...Option 1. Shrink X6 (probably with redesigned Llano "STARS" core, so 3% IPC increase lets say) and increase frequency a tad. Lets say that this arch. will do 4.5 Ghz.
    ...Option 2. Add more cores, most likely decrease IPC from Thuban or keep it the same using Llano's tweaked core...lets say this arch will do 4.1 Ghz.

    Bulldozer. More IPC than X4 in 4 threads or less, "less" distributed per "core" in 8.

    Also, IPC is so far behind in Phenom II, why would we use STARS again? We are verging on 25-30% slower than Intel CPC, with a 15% frequency difference and new intel chips are doing 3.8 Ghz turbo, OCing to 4.8-5.0. We need a change. (If 5% IPC hit means 15-20% more clocks, I'm all for it tbh.)

    You guys are so focused on multi-threaded results it's rediculous. Trying to predict single thread performance with a multithread benchmark is rediculous.

    It's kind of like comparing a 2600K that does 5 Ghz on air to a 980X that does 4.3. Do you really want that 980X because its Cinebench score is higher, or would you like the extra single thread perf?

    With no real CLEAR results WITH explanations out yet, I am still firm with my belief that in layman's terms, CMT = AMD HT in physical form that can not be turned off, trumping Intel's HT.
    Last edited by BeepBeep2; 09-23-2011 at 07:03 PM.
    Smile

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