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[Softpedia] AMD 900-Series Chipset Required for Bulldozer Power Gating Technology - Page 6

post #51 of 58
well I already sold my 1090t + 890FXA setup, so bring on bulldozer + 990FX!!
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post #52 of 58
Quote:
Originally Posted by Fr0sty View Post
heres my thinking ...


since its on a module basis i think that the pipeline of the module are kind of tied together ...


so if they shutdown something its the core itself ... not the pipeline ... ... so instead of having 2 core with the logic unit for each of them being used for each core it could disable the core .. but keep the pipeline in use for that leftover core in the module ... so no decrease in performance ... and then they could also boost performance by increasing the speed ... heres how i think they will do it .. but then again i might be off


makes sense ???
No, no sense what so ever. You're mixing cores and pipelines and how they're defined in BD.

BD's modules, due to the shared resources are meant to have somewhere around 180% of the performance of two "complete" BD cores

JF-AMD has said that if an 8 core BD cpu (for example) is only using 4 threads, then each module will run a thread as a complete BD core, in other words no shared resources.

He didn't say how BD would achieve this. Brutus is saying that it may require power gating to seperate the interger pipelines, which are counted as cores, within a module.

If this is the case, and your board doesn't support power gating, then you'll only ever have 90% performance per core in single thread and not 100%. It's not about clock spead, it's about resources.

...hence an AM3 board could gimp Bulldozer.
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post #53 of 58
It's good to see SOME people know what they are talking about.... please read up on the subject before jumping in to post.

Sent from my Droid Incredible using Tapatalk.
post #54 of 58
Quote:
Originally Posted by purpleannex View Post
No, no sense what so ever. You're mixing cores and pipelines and how they're defined in BD.

BD's modules, due to the shared resources are meant to have somewhere around 180% of the performance of two "complete" BD cores

JF-AMD has said that if an 8 core BD cpu (for example) is only using 4 threads, then each module will run a thread as a complete BD core, in other words no shared resources.

He didn't say how BD would achieve this. Brutus is saying that it may require power gating to seperate the interger pipelines, which are counted as cores, within a module.

If this is the case, and your board doesn't support power gating, then you'll only ever have 90% performance per core in single thread and not 100%. It's not about clock spead, it's about resources.

...hence an AM3 board could gimp Bulldozer.
Each module does not run a single thread. 1 thread per core.
post #55 of 58
Quote:
Originally Posted by purpleannex View Post
JF-AMD has said that if an 8 core BD cpu (for example) is only using 4 threads, then each module will run a thread as a complete BD core, in other words no shared resources.

Brutus is saying that it may require power gating to separate the integer pipelines, which are counted as cores, within a module.

...hence an AM3 board could gimp Bulldozer.
Power gating might be required to use modules alongside the actual cores? The article mentioned and others within the first page of news make power gating seem like it's literally just for another form of 'cool n quiet' that can enable/disable cores on-the-fly. Cool feature, but not for enthusiasts

I think it's more likely that the new 9xx chipsets will have power gating on/off in their bios, and AM3 motherboards have to enable/disable from bios manually.


Quote:
Originally Posted by Domino View Post
Each module does not run a single thread. 1 thread per core.
What? I thought the whole damn point of the modules was to act as threads!
Edited by johonm333 - 4/26/11 at 4:49pm
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post #56 of 58
PLEASE! For the love of Saint Pete, leave the word "modules" out of these discussions, ok? Modules are an AMD engineering term to describe TWO, repeat, TWO cores that share certain resources but run 1 thread per core. It has been on the BD blog forever and it has been repeated here allot. This has been an Obakemono public service address.
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post #57 of 58
I think some people are confused to what "Power Gating" is...

"Power gating, a technique that allows a core to be near-completely powered down minimizing leakage current when inactive. This not only reduces idle power but it also enables use extra TDP to turbo up active cores."
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post #58 of 58
Quote:
Originally Posted by Domino View Post
Each module does not run a single thread. 1 thread per core.
Where did I say that?
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