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Why Opty 165??

post #1 of 21
Thread Starter 
I see a lot of people have the opty 165. I was wondering what is so special about this chip???
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post #2 of 21
AMD made it
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post #3 of 21
it is a crazy overclocker
    
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post #4 of 21
Built on FX technology, OC's like crazy. Bragging rights of a server chip.
   
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post #5 of 21
it was the best chip for its time
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post #6 of 21
Thread Starter 
what are the stock speed and general good O.C. achieved?
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post #7 of 21
Plus you get 2 x 1mb cache
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post #8 of 21
Quote:
Originally Posted by TopTech84 View Post
I see a lot of people have the opty 165. I was wondering what is so special about this chip???
It's perceived to be the "best" overclocker for Socket 939. The reason for this perception is that it starts at a relatively slow stock speed of 1.8GHz, then is able to scale up to 2.6GHz - 3.0GHz (3K MHz for the so-called "Golden Chips" from certain stepping batches). Even if it reaches "just" 2.6GHz, that's a gain of 800MHz, which is impressive.

As I say, though, the Opteron 165's reputation is a result of a perception. What people sometimes forget is that for every CPU architecture, there is a limit to how high it can scale in frequency. In other words, there's a definite ceiling to how fast you can make it run. The Opteron 165 is thought to be the "best" overclocker is purely a function of how low its floor is.

Consider this: Say you have two CPUs. Both are Opterons from the same stepping batch (say, the magical CCBBE 0610DPMW, which, according to statistics is the most likely batch from which 3.0GHz chips come), but one is an Opteron 165 (stock speed 1.8GHz), and the other is an Opteron 170. The 165 has a maximum CPU multiplier of 9x, while the 170 has a max multi of 10x.

Slot both chips into the same motherboard, use the same rig to see how fast both chips can get. Let's say the 165 hits a maximum of 3.0GHz. Then you put the 170 in, and it hits the very same maximum speed of 3.0GHz. Which, then, is the better overclocker?

Because the 165 scaled higher by 200MHz, most would probably say it's better than the 170. In my opinion, though, they're both just as good, because they both got to the same maximum speed. Undoubtedly, though, this is a contentious point.

Sorry for the long post, but I thought it might be helpful to share these opinion.

Hope it helps!
    
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post #9 of 21
Quote:
Originally Posted by txtmstrjoe View Post
It's perceived to be the "best" overclocker for Socket 939. The reason for this perception is that it starts at a relatively slow stock speed of 1.8GHz, then is able to scale up to 2.6GHz - 3.0GHz (3K MHz for the so-called "Golden Chips" from certain stepping batches). Even if it reaches "just" 2.6GHz, that's a gain of 800MHz, which is impressive.

As I say, though, the Opteron 165's reputation is a result of a perception. What people sometimes forget is that for every CPU architecture, there is a limit to how high it can scale in frequency. In other words, there's a definite ceiling to how fast you can make it run. The Opteron 165 is thought to be the "best" overclocker is purely a function of how low its floor is.

Consider this: Say you have two CPUs. Both are Opterons from the same stepping batch (say, the magical CCBBE 0610DPMW, which, according to statistics is the most likely batch from which 3.0GHz chips come), but one is an Opteron 165 (stock speed 1.8GHz), and the other is an Opteron 170. The 165 has a maximum CPU multiplier of 9x, while the 170 has a max multi of 10x.

Slot both chips into the same motherboard, use the same rig to see how fast both chips can get. Let's say the 165 hits a maximum of 3.0GHz. Then you put the 170 in, and it hits the very same maximum speed of 3.0GHz. Which, then, is the better overclocker?

Because the 165 scaled higher by 200MHz, most would probably say it's better than the 170. In my opinion, though, they're both just as good, because they both got to the same maximum speed. Undoubtedly, though, this is a contentious point.

Sorry for the long post, but I thought it might be helpful to share these opinion.

Hope it helps!
I partially disagree.

The Opteron 165 was popular mainly because it was the cheapest dual core CPU that overclocked like mad. For anyone that should consider overclocking, if the two chips are of the same stepping like in your example (which happens to be the stepping I have as well ) then the 170 - with the higher multiplier - would be the better (and easier) overclocker. The chance of your motherboard and RAM limiting your overclock is not as likely, or, at least, does not hinder your potential as much.

A good example is your system and mine. Your overclock of 2.8GHz only needs your FSB to be at 280MHz whereas on mine it takes at least 312MHz! And along the way, I needed to up the voltage to my Northbridge and compromise my RAM speed to get it to POST.

Perception may have played a little bit in its popularity. However, anyone who has overclocked will more than likely agree that the CPU with the higher multiplier would be the better choice if price was of no concern.
     
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post #10 of 21
Agreed. The price had a lot to do with it.

Right now, on the AM2 side of things, the X2 3600+ Brisbane is making quite a reputation for itself.
    
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