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[FUD] Bulldozer to come close to i7 - Page 16

post #151 of 163
Quote:
Originally Posted by Demonkev666 View Post
wow, the closer we get to launch the more unknown "news" sites pop out from the woodwork and claim insider info. The news (if true) would be cool, but until confirmed with benchmarks from a more reliable site this doesn't mean much.

I guess now is the time to launch a rumor site... thing is to get noticed you gotta make increasingly ridiculous claims...

My site would claim that an octocore BD chip can outperform a deca-core ivy bridge by 120% in the HDBS2012 benchmark!!
Edited by amay200 - 1/12/11 at 11:01pm
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post #152 of 163
Quote:
Originally Posted by IntelConvert View Post
and as for power consumption, all the new intel 1155 socket CPUs have a max TDP of 65w or 95w at stock. intel doesnt even have a 125w TDP CPU, but AMD is still using 125w on BD, according to the limited amount of information about this ground breaking architecture....
All the performance varients of the Intel processors are 95w TDP - and they are all 32nm CPUs, while AMD's 125w TDP processors are still 45nm

We'll have to wait to see how AMD's Zambezi compares, as it will be 32nm.
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post #153 of 163
Quote:
Originally Posted by IntelConvert View Post
and as for power consumption, all the new intel 1155 socket CPUs have a max TDP of 65w or 95w at stock. intel doesnt even have a 125w TDP CPU, but AMD is still using 125w on BD, according to the limited amount of information about this ground breaking architecture....
Let us not forget that the TDP of all modern intel chips includes built-in GPU and integrated PCI-E lanes.
post #154 of 163
Quote:
Originally Posted by ThePath View Post
Let us not forget that the TDP of all modern intel chips includes built-in GPU and integrated PCI-E lanes.
well then, the actual TDP of the CPU itself (minus the PCIe lanes and GPU) is actually lower than 95w. thats impressive.

Quote:
Originally Posted by un-nefer
All the performance varients of the Intel processors are 95w TDP - and they are all 32nm CPUs, while AMD's 125w TDP processors are still 45nm
BD wont be 32nm? i was under the impression it was. a few vague articles (that are also quite old, and probably not accurate) even claim a jump to 22nm, but that cant be the case.
    
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post #155 of 163
Quote:
Originally Posted by IntelConvert View Post
well then, the actual TDP of the CPU itself (minus the PCIe lanes and GPU) is actually lower than 95w. thats impressive.



BD wont be 32nm? i was under the impression it was. a few vague articles (that are also quite old, and probably not accurate) even claim a jump to 22nm, but that cant be the case.
Bulldozer will be 32nm
Quote:
Die size – Because we are moving to a 32nm process we will be delivering these products in a smaller die than current 45nm products
source

i wouldn't be too worried about TDP, AMD has been more aggressive than Intel in regards to releasing model updates with faster clockspeeds and lowing TDP
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post #156 of 163
Interesting news. I certainly hope AMD has finally produced a chip capable of putting a flame to Intel.

Nice.
 
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post #157 of 163
Quote:
Originally Posted by amay200 View Post
Bulldozer will be 32nm

source

i wouldn't be too worried about TDP, AMD has been more aggressive than Intel in regards to releasing model updates with faster clockspeeds and lowing TDP
ty for source, i was certain BD was 32nm
    
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post #158 of 163
Quote:
Originally Posted by IntelConvert View Post
BD wont be 32nm? i was under the impression it was.
Yes it will. My post was pointing out that the earlier poster shouldn't be comparing TDP of i7's to pIIs as the i7s are 32nm and the pIIs are still 45nm and that we'll just have to wait to see what the TDP is of the comparable Zambezi for better comparison (as they'll also be 32nm)
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post #159 of 163
I guess I'll weigh in.

A BULLDOZER MODULE IS NOT TWO COMPLETE CORES!!!

AMD may like for you to believe this to be true, but it is not (strictly speaking). Each module has only one FPU (floating point unit) The addition of the second "core" (which is only for integers NOT floats) takes only 12% additional die space for DOUBLE the INTEGER performance (but shares the float unit making the second integer core incomplete ie not real). SMT (simultaneous multithreading AKA hyperthreading) on Intel chips takes 5% additional die space and only offers 10-30% performance increases and it will result in performance loss when efficient programming algorithms are used.

edit: AMD claims 80% increase in total performance for the addition of a second integer core. The likely reason that performance is not doubled is caused by an integer unit waiting to use the FPU. As more float calculations are offloaded to a dedicated unit, it can be hypothesized that integer performance will approach the magic 100% mark (it is still possible for the only float numbers used in quite a while to still need to be crunched at the same time thus making the guarantee of 100% theoretically impossible (scheduling aside), but at that point performance difference would be only one cycle which is insignificant when measuring in gigahertz)


Most benchmarks measure FLOPS (floating point operations per second). Because an "eight core" bulldozer processor only has 4 FPU's, it having equal FLOAT performance to a quad-core i7 (which also has 4 FPU's) is not completely surprising nor is it surprising that a benchmark would show them as nearly equal in performance. It should also be mentioned that any benchmarks used were not likely to have been compiled for AVX and if they were, bulldozer performance would increase drastically. If a benchmark were to take only integer performance into account, it is likely that a four module bulldozer would mop the floor with a four-core sandy bridge because bulldozer has eight integer cores. It is also noteworthy that the most commonly used non-graphical applications (word processors, web browsers, etc) use many times more integer calculations than float calculations.

One last thing to note on FPU performance: AMD isn't interested in super fast x86 FPU's. AMD bought ATI in order to take advantage of the extreme float power inherent in graphics cards. The fastest supercomputer in the world (FLOPS not integer) uses a horde of Nvidia graphics cards. Integrating a graphics card (or using an add in card) is much more efficient (per mm^2) at floats than increasing the number of x86 float units (if the majority of the floats are offloaded, one FPU can satisfy the needs of more than one integer unit).

All that said, I look forward to the upcoming sandy bridge vs bulldozer cage match.
Edited by hajile - 1/14/11 at 8:23am
post #160 of 163
Quote:
Originally Posted by IntelConvert View Post
and as for power consumption, all the new intel 1155 socket CPUs have a max TDP of 65w or 95w at stock. intel doesnt even have a 125w TDP CPU, but AMD is still using 125w on BD, according to the limited amount of information about this ground breaking architecture....
You fail, for one. Bulldozer will not be pitted against LGA1155 for the most part, it will be competiting with the high end LGA2011 socket, X68 chipset and CPUs - most of which have a 130W TDP. Even if it does compete with the LGA1155 socket, it probably won't be competing with the 8 core/8 thread variant. I think the very slight bit of extra TDP for an amazing 8 cores vs. only 4 (despite 8 threads) is very necessary and won't be a huge pain in the neck.
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