EXTREME Overclocking  - AMD Phenom II X4 955 BE & 945 AM3 Processors Review - Page: 15
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AMD Phenom II X4 955 BE & 945 AM3 Processors

Date: April 23, 2009
Product: Phenom II X4 955 BE (3.2 GHz) & 945 (3.0 GHz) AM3 CPUs
Company: Advanced Micro Devices (AMD)
Author: Jason Rabel

Overclocking:

Since the Phenom II X4 955 is a Black Edition (unlocked multiplier) processor, I simply used the AMD Overdrive tool to increase the multiplier and adjust the CPU voltage. For air cooling I tried a Zalman CNPS-9700 and Scythe Infinity with a wide assortment of fans.

At stock voltage on the Phenom II X4 955 we were able to achieve a stable 3.7 GHz. To run at 3.8 GHz required a slight bump in voltage to 1.375V. For some reason past that speed nothing was stable, no matter what voltages or tweaks were used (and we tried everything). 3.9 GHz felt very close (it required close to 1.5V), with a little better cooling it might have been stable. No matter how hard I tried, the magical 4GHz was not stable with any voltage.

Here's a breakdown of the numbers, all tests were done on air (as mentioned above):

  • 3.2 GHz / 1.350V = Stock
  • 3.7 GHz / 1.350V = Max Stable OC @ Default Voltage
  • 3.8 GHz / 1.375V

Phenom II X4 955 @ 3.8 GHz:

 

Overclocking Benchmarks:

 





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