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"Unlocked" Quad vs True Quad

post #1 of 13
Thread Starter 
I know I haven't tried unlocking my cpu yet, but was wondering the performance difference between the two. Are they essentially the same thing?

Let's say a Phenom II x2 560 unlocks to x4 and overclocked to 4.0Ghz.

Would that put in comparison to Phenom II x4 965BE at 4.0Ghz?

How does this work?
post #2 of 13
AFAIK, with core unlocking you'd get the performance of the x4 but might not get the stability of a TRUE x4.
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post #3 of 13
The architecture is exactly the same, so yes, they will perform the same.
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post #4 of 13
Yes, but it's more equivalent to a 940. And yes depends on your CPU, if it will even unlock, or unlock with a weak 4th core.
Don't forget, it was disabled for a reason. (didn't reach the standards of AMD) My 720 was fine unlocked. See pic. Note that they call it a X20 because they don't know what series it is with 4 cores. They don't label it a 720.

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post #5 of 13
You may need slightly more voltage unlocked than not...... or it doesn't unlock at all
post #6 of 13
As mentioned before, Unlocking a Dual or Tri-Core processor will deliver the same speed but will lead to CPU instability, especially your Overclock is at 4.0GHz
post #7 of 13
Also, you need a Higher Voltage on your CPU if you are to achieve maximum unlocking Stability.
post #8 of 13
Have a Phenom II X3 740 unlocked to Phenom II X4 40.

Compared to the X3, the X4 uses more power (for the extra core), runs hotter, doesn't overclock as high, and can require more voltage for a similar clock speed (one additional .025v step dependent on speed).

Your 560 is a C3 revision, so it should clock fairly well unlocked assuming the extra cores are stable. I would overclock it in steps to 4ghz w at least a 2.6 cpu-nb as just an X2 and record the voltages needed. Will be useful for comparison with voltages after unlocking.
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post #9 of 13
Oh, yes I forgot to mention, the 965BE, or any other processor for that matter, Has a higher level of Processor Cache, this can make performance vary, but only in a slight and very technical way, in other words, If your processor cache is lower then you will see a Very small performance increase when stepping up to a processor with higher cache. Example: an Athlon X4 640 Overclocked to 4.0GHz will not perform better than a 965BE clocked at 4.0GHz because the Athlon only has 2MB of processor cache and the 965BE has 6MB, that is not the only reason the Athlon Will be outperformed, but it is one reason.
post #10 of 13
Thread Starter 
All right guys, I am going to give this a try! Thanks for all the input!
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