Topic Title: Why AMD ?
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Created On: 08/22/2014 04:20 PM
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 08/22/2014 04:20 PM
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kali19
Peon

Posts: 15
Joined: 11/22/2012

First off I'm not trying to start a flame war

 

Can someone please explain to me why Intel CPU's seem to be so much better than the AMD equivalent ? Why is for example an FX8*** so under powered when compared to an Intel i7 Haswell ?

 

I know AMD CPU's are better value for money and that the early FX series had problems but is it just how the chip works ?

 

What is meant when people say the FX has two computational units ?

 

I know I'm asking a lot of questions and have tried to Google for them but the answers just go into techno babble,  I need a K.I.S.S. (Keep It Simple Stupid) answers !!!

 

Ta 

 

Kali19.

 08/22/2014 06:36 PM
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jeepster
Peon

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Long story: Intel dumped Pentium 4 for Core 2, which had much better instructions per clock. Then going to Nehalem they introduced internal memory controller (which earlier gave AMD the upper hand with Athlon 64 X2 ). Sandy Bridge made further imrovements to the architecture.  After that Intel didn't boost performance much, but reduced power consumption with the die shrinks.

Meanwhile AMD had K10, did a K10.5 with tiny improvement, then dumped it for Bulldozer, which has 2 integer cores, but they share other components of the CPU. It was a disappointment. The following generations haven't improved enough.

Intel is way ahead on single-threaded performance, and many applications still do not use parallel code.  To get similar from AMD, you needed the FX-9000 series with insanely high power consumption.

 

 08/23/2014 05:14 PM
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kali19
Peon

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Wow, Thanks jeepster !

 

In just a few sentences you have made more sense than any of the 20+ other explanations I have read about.

 

So if I'm understanding you correctly it seems that AMD have taken a giant step backwards by making the FX series have to share key parts of it's structure with other parts instead of making it a true multi core CPU ?

But I suppose that is all down to office politics

 

 

Kali19

 08/23/2014 05:40 PM
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black_zion
80 Column Mind

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No, the problem is that the Bulldozer architecture is great for servers and HPCs where multiple threads are properly utilized, but non professional applications, especially games, haven't reached that point yet. Thanks to the kiddie consoles using multiple low speed cores, they will get better, but they're not there yet.

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 08/23/2014 06:09 PM
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kali19
Peon

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Thanks black-zion,

 

But now I'm really confused !

 

So AMD make a wonderful business based CPU ie the FX series but promote it as a home/game CPU, so what is the 'fit' for the Opteron now if the FX has taken it's place ?

 

Kali19

 08/23/2014 06:17 PM
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chrisjames61
Peon

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In a nutshell, Intel has the resources to outspend AMD 20 to 1 in research and development. AMD has done a good job keeping things this close.

 08/23/2014 06:27 PM
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kali19
Peon

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Cheers chrisjames61,

That was one of the pieces of info I had managed to work out for myself

 

Kali19

 

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