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[Hexus] AMD to release FX centurion-5 ghz on air - Page 26

post #251 of 254
2500k will certainly hit 5ghz much easier then 3570k and 4670k that is for sure its great chip!
In full MT yea no i5 compares with FX-8XXX
But in ST it would destroy ...so:)

I dont think this FX-9000 will be regular FX-8350... it might be based on PD architecture but i think it will be semi custom, beefed up chip.

lets w8 and see
post #252 of 254
Quote:
Originally Posted by malmental View Post

Brutuz -
I'm not so sure if both were @ 5.0GHz the AMD would win.
we all know Intel is the stronger chip and 'crunches more data' then AMD so an overclocked Intel chip excels.
so whatever gap the FX-83xx had or has in Crysis 3 for example or any other app/game can be nullified and the passed.
Intel 'performance ratio' is higher than AMD's.

I really would like to see benches or here from Alatar on this one.


Google edit:
Calculation of IPC
The number of instructions per second for a processor can be derived by multiplying the instructions per cycle and the clock speed (measured in cycles per second or Hertz) of the processor in question. The number of instructions per second is an approximate indicator of the likely performance of the processor.

Instructions per second (IPS)
is a measure of a computer's processor speed. Many reported IPS values have represented "peak" execution rates on artificial instruction sequences with few branches, whereas realistic workloads typically lead to significantly lower IPS values. The performance of the memory hierarchy also greatly affects processor performance, an issue barely considered in MIPS calculations

Intel has stronger single core performance, that's it...When 8 threads are used the FX ends up equal or ahead depending on the workload...While I don't have 5Ghz benchmarks, there's plenty that agree with me on IPC being equal or in AMDs favor when 8 threads are used.

Anandtech (FX-8320 and i5 3570k are equal in clocks when all is said and done, as AMDs Turbo Core implementation is worse than Intels overall which makes up for the tiny 100Mhz clock speed advantage, iirc AMDs Turbo Core only really activates when a single-thread is active while Intels activates to a lower level whenever it can.)
TomsHardware (See the Multi-threaded results mainly, in fact in the total benchmark time the FX was a little faster than the i5, meaning that if you do everything that they tested the FX would be slightly faster when you take every app into account)

I can find more if you want, but I can't think of any off the top of my head that offer a large comparison like Anand and TH do that I know of.

Who knows though, maybe because Intel has higher IPC they gain more from an OC than AMD...But, if we go from what we know of the IPC, clock speeds, etc then the FX would be slightly faster while using a lot more power when loaded and having a tiny difference when idle.
    
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post #253 of 254
thanks for the detailed response..
thumb.gif
post #254 of 254
Quote:
Originally Posted by Brutuz View Post

Intel has stronger single core performance, that's it...When 8 threads are used the FX ends up equal or ahead depending on the workload...While I don't have 5Ghz benchmarks, there's plenty that agree with me on IPC being equal or in AMDs favor when 8 threads are used.

Anandtech (FX-8320 and i5 3570k are equal in clocks when all is said and done, as AMDs Turbo Core implementation is worse than Intels overall which makes up for the tiny 100Mhz clock speed advantage, iirc AMDs Turbo Core only really activates when a single-thread is active while Intels activates to a lower level whenever it can.)
TomsHardware (See the Multi-threaded results mainly, in fact in the total benchmark time the FX was a little faster than the i5, meaning that if you do everything that they tested the FX would be slightly faster when you take every app into account)

I can find more if you want, but I can't think of any off the top of my head that offer a large comparison like Anand and TH do that I know of.

Who knows though, maybe because Intel has higher IPC they gain more from an OC than AMD...But, if we go from what we know of the IPC, clock speeds, etc then the FX would be slightly faster while using a lot more power when loaded and having a tiny difference when idle.

You put this very well. I've been trying to think of a good way to explain that 3.5ghz base 3.9ghz turbo does not mean the chips run at the same frequency all the time. Heck, Nvidias with Turbo don't even run the same between chips at the same speeds.

I think that when IPC numbers get thrown around regarding comparing Intel vs AMD right now, that people just ignore turbo speeds and compare base speeds. The truth is we have no idea what these two chips are running at when they do single thread benchmarks, because that information isn't provide. However, FX 8350 runs at 4ghz stock and the popular Intel chips run at 3.5ghz, or a 14% clockspeed difference. When you compare turbo speeds, the FX 8350 is only a little over 7% faster than 2500, 2600, 3570k, 3770k, etc.

That basically leaves about 7% clockspeed advantage for Intel that gets burried in math and CPU turbos. When it's behind roughly 20% in stock benchmarks, that can make a pretty big difference. It could mean that some of the "IPC" numbers that get thrown around are nearly twice as big as they need to be.
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