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Intel Core i5-2500K 3.3GHz vs. AMD FX-8150 3.6GHz

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June 16, 2012 6:30:23 PM

Hello,
I always thought that higher frequency is better and more cores helps with media encoding, but from what I have heard the Intel Core i5-2500K 3.3GHz quad core is better than the AMD FX-8150 3.6GHz 8-Core at everything but media encoding.
http://www.anandtech.com/show/4955/the-bulldozer-review...
http://www.anandtech.com/show/4955/the-bulldozer-review...

My question is, why is the Bulldozer worse if it has a higher frequency?

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June 16, 2012 10:43:15 PM
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Tokamocha said:
Hello,
I always thought that higher frequency is better and more cores helps with media encoding, but from what I have heard the Intel Core i5-2500K 3.3GHz quad core is better than the AMD FX-8150 3.6GHz 8-Core at everything but media encoding.
http://www.anandtech.com/show/4955/the-bulldozer-review...
http://www.anandtech.com/show/4955/the-bulldozer-review...

My question is, why is the Bulldozer worse if it has a higher frequency?

You can not compare clock speed directly between two different architectures. Here is a side by side comparison http://www.anandtech.com/bench/Product/434?vs=288
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a c 265 à CPUs
a b À AMD
a b å Intel
June 16, 2012 11:14:57 PM

Tokamocha said:
Hello,
I always thought that higher frequency is better and more cores helps with media encoding, but from what I have heard the Intel Core i5-2500K 3.3GHz quad core is better than the AMD FX-8150 3.6GHz 8-Core at everything but media encoding.
http://www.anandtech.com/show/4955/the-bulldozer-review...
http://www.anandtech.com/show/4955/the-bulldozer-review...

My question is, why is the Bulldozer worse if it has a higher frequency?


Three reasons.
1) Sandy bridge does more work per clock cycle.
2) Bulldozer cores are not truly 8 independent cores, each pair shares resources which hurts in some types of workloads.
3) A "K" chip can be overclocked. A 2500K will happily spend it's life at 4.5 or better.
June 17, 2012 8:39:34 PM

Best answer selected by Tokamocha.
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