EXTREME Overclocking  - AMD Phenom II X6 1075T & X4 970 BE & X2 560 BE Processors Review - Page: 13
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AMD Phenom II X6 1075T & X4 970 BE & X2 560 BE Processors

Date: September 21, 2010
Products: Phenom II X6 1075T & X4 970BE & X2 560 BE CPUs
Company: Advanced Micro Devices (AMD)
Author: Jason Rabel

Overclocking & Core Unlocking:

Considering these processors are newer batches, the theory goes that they should overclock better on average. As always, your mileage may vary... nothing is guaranteed... you break it, you bought it... have fun, and good luck! I would try up to 1.5v for each processor, past that you really don't want to run it 24/7... Please remember, I'm just trying to get a ballpark number, even at that broad a range I still spend a LOT of time on this.

First up, the Phenom II X2 560 Black Edition. I tried unlocking the two extra cores, one was a completely toast (system would not boot), the other would instantly give errors in Prime95. I was a little disappointed considering my previous X2 555 BE unlocked the extra two cores perfectly, but that's the risk you take. As for overclocking, I simply adjusted the voltage & multiplier, here is how it did:

  • 3.30 GHz / 1.325v = Stock Speed & Voltage
  • 3.70 GHz / 1.325v = Max Stable OC @ Stock Voltage
  • 3.80 GHz / 1.350v
  • 3.90 GHz / 1.400v
  • 4.00 GHz / 1.475v = Max Stable OC

 

Next up is the Phenom II X4 970 Black Edition. Again, since it's a BE chip I simply adjusted the voltage and multiplier to overclock.

  • 3.50 GHz / 1.400v = Stock Speed & Voltage
  • 3.90 GHz / 1.400v = Max Stable OC @ Stock Voltage
  • 4.00 GHz / 1.450v
  • 4.10 GHz / 1.500v = Max Stable OC

 

Finally we take a shot at the Phenom II X6 1075T, however this processor is NOT a Black Edition, so we had to overclock the old fashioned way. One minor hiccup I didn't notice until the last minute was the ASUS board I was using decided to automatically up the default CPU voltage! I didn't have enough time to re-bench using my normal methodology, so we'll just have to live with the slight offset. The actual increase in voltage was about +0.055v offset... Nothing huge, but I just wanted to disclose this for completeness.

  • 3.00 GHz / 1.275v = Stock Speed & Voltage
  • 3.98 GHz / 1.330v
  • 4.05 GHz / 1.355v
  • 4.13 GHz / 1.380v
  • 4.20 GHz / 1.430v = Max Stable OC

Any higher and it just wasn't stable, even with more voltage. Temperatures were around 62C under load @ 4.20GHz. Better cooling would probably help squeeze out at least a couple hundred MHz more.

 





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