"With this being a "Black Edition" processor, overclocking can be done two ways. One, you can use only either the reference clock or multiplier, or you can adjust a combination of the two for the best overclock available. I prefer to use the combination of the two with the multiplier being adjusted first. I started off pushing up the multiplier 1x at a time while adjusting voltage until I was no longer able to benchmark stable. Once the limit was reached I backed off a half multiplier until I was again stable. Then I started increasing the reference clock paying attention to the other components affected by the increase. For the Phenom II X4 980 I was able to reach a top speed of 4.36GHz which came out to have a multiplier of 20.5x and a reference clock speed of 212MHz at 1.5v."
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