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Topics:

Overclocking - Hitting The Limit At 2.70 GHz, Continued

12:41 PM - February 5, 2008 by The Editors of Tom's Hardware
Source: Tom's Hardware US – Keywords: amd, phenom, 9600, black, edition
Topics: AMD/ATI, Build Your Own, Business, Overclocking

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Table of Contents:

Overclocking - Hitting The Limit At 2.70 GHz, Continued

Once you have achieved a stable clock speed at the default voltage when overclocking the Phenom processor, even a voltage tweak won't help much. The best you can hope for is to squeeze out a little more performance. Considering the jump in power consumption, as well as the associated increase in thermal dissipation, this minor performance increase is usually not worthwhile. At least, that was our experience with our review sample.

The Prime95 torture test was stable at 2.70 GHz.

At a CPU frequency of 2.70 GHz, the memory runs slightly faster than at 2.60 GHz.

Phenom Memory Dividers
CPU Frequency Divider 5 Divider 6 Divider 7
2700 MHz DDR2-1080 DDR2-900 DDR2-771
2600 MHz DDR2-1040 DDR2-866 DDR2-742

With the Phenom 9600 Black Edition running at 2.70 GHz, the RAM operates at DDR2-771.

Phenom 9600 Black Edition @ 2.70 GHz
CPU Frequency 2.70 GHz (+ 17.39%)
Multiplier x13.5
internal FSB/HTT 200 MHz / 1800 MHz
Core Voltage 1.400 V (+ 0.150 V)
Memory Divider 2700:7
Memory Frequency DDR2-771 (385 MHz)
Memory Latency CL 4.0-4-4-12

Our Phenom 9600 Black Edition possesses an overclocking potential of 17.4%.


Talkback
ShadowKai 07/06/2008 7:34 AM
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ShadowKai

I think on page 14 the author meant:

"When Cool'n'Quiet is deactivated, idle power consumption rises to 51 watts. The jump in power consumption at 2.70 GHz is a direct result of the core voltage increase from 1.250 V to 1.400 V."

And the bars for Phenom 9600 BE and Phenom 9600 BE (CnC) should be switched around.

Anonymous 10/02/2008 8:34 AM
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I think it's also important to mention the fact that Vista SP1 includes it's OWN TLB fix which overrides the bios setting of many boards. I used an app that works in conjunction with Crystal CPUID to change the MSR directly to deactivate this secondary TLB fix. It caused a dramatic improvement in performance; the quick and simple WinRAR bench went from 232 to ~1300 after the fix. Just think it's worth mentioning!

Note You are going to post a comment as anonymous.