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[Softpedia] AMD 900-Series Chipset Required for Bulldozer Power Gating Technology - Page 5

post #41 of 58
Quote:
Originally Posted by Domino View Post
Because it is a needless feature for us overclockers. Having a 900 series chipset will not benefit you in any means of performance when compared to an 800 series chipset. It is by no means inconceivable to use bulldozer on an 800 series chipset.
No, it's not a needless feature, what if it disables single integer pipelines to let the other one in that module to get a performance increase?

Quote:
Originally Posted by smash_mouth01 View Post
No they didn't mix up stamps, it is indeed a 790i but with added features.
790a, i is for Intel.
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post #42 of 58
I am going to do this at my self
post #43 of 58
Knew there was a catch.
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post #44 of 58
Quote:
Originally Posted by Brutuz View Post
No, it's not a needless feature, what if it disables single integer pipelines to let the other one in that module to get a performance increase?
It only disables certain parts of the CPU when it is not in use. But that is for power gating.
Edited by Domino - 4/25/11 at 8:05pm
post #45 of 58
Quote:
Originally Posted by Domino View Post
It only disables certain parts of the CPU when it is not in use. But that is for power gating.
Yeah, but if they disable one pipeline it pretty much frees up an entire cores stuff to one of the pipelines, increasing single thread performance for that module, say you had a 8 core BD and you had a load that used 4 cores, it could just use one module per core.
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post #46 of 58
Quote:
Originally Posted by Brutuz View Post
Yeah, but if they disable one pipeline it pretty much frees up an entire cores stuff to one of the pipelines, increasing single thread performance for that module, say you had a 8 core BD and you had a load that used 4 cores, it could just use one module per core.

a module is 2 cores
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post #47 of 58
Quote:
Originally Posted by Brutuz View Post
Yeah, but if they disable one pipeline it pretty much frees up an entire cores stuff to one of the pipelines, increasing single thread performance for that module, say you had a 8 core BD and you had a load that used 4 cores, it could just use one module per core.
I'm sorry, I'm not quite following. How would turning off a pipeline improve performance? I thought power gating simply turns off components that are not in use? It effectively lowers overall power consumption.

If you overclock to the same speeds as the turbo mode then there is not much use for the power gating feature for us.
post #48 of 58
Quote:
Originally Posted by Fr0sty View Post
a module is 2 cores
I know, I'm saying if they disable one of the pipelines (eg. The main part of the core) then the other core in that module will get some performance increases.

Quote:
Originally Posted by Domino View Post
I'm sorry, I'm not quite following. How would turning off a pipeline improve performance? I thought power gating simply turns off components that are not in use? It effectively lowers overall power consumption.

If you overclock to the same speeds as the turbo mode then there is not much use for the power gating feature for us.
If it disables, say, one core in a module, the shared components won't be shared any more and may get a small performance increase from that.
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post #49 of 58
Quote:
Originally Posted by Brutuz View Post
I know, I'm saying if they disable one of the pipelines (eg. The main part of the core) then the other core in that module will get some performance increases.



If it disables, say, one core in a module, the shared components won't be shared any more and may get a small performance increase from that.

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 ???
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post #50 of 58
Here's a tidbit straight from the article:

Quote:
Originally Posted by Softpedia
Furthermore, AMD has also implemented a series of power-gates in the chips, which can shut off specific parts of the CPU when these aren't used, such as an inactive core.
So new motherboards being able to run sli + power saving features seem to be the only difference
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