btw, my HDD fail on long DST not sure whether if it affected prime95, (lazy to send for RMA, include this its second time fail. seagate... seagate haihhhhh...)
Added on November 4, 2009, 11:20 pmNorthbridge
Whenever one is talking about the North Bridge (NB) of a Phenom II, it is safe to assume that they are talking about the CPU-NB. The CPU-NB is a section of the CPU that controls the L3, Memory Controller and the Hyper-Transport (HTT). As mentioned before the CPU-NB and the HTT have different multipliers, please remember this.
When you overclock your CPU, the higher you go the more likely you will need to stabilize the CPU-NB. What do I mean by this? As the CPU increases its speed to calculate data, so must the speed of which the CPU communicates with other components on the Motherboard: chipset, memory, etc. Let me take the classic example of a 4.0 GHz 940BE and its CPU-NB. If you were to leave the CPU-NB at 1.8 GHz stock then the data calculated by the CPU would create a bottleneck and thus resulting in errata errors or CPU errors. So in order to balance these speeds a CPU-NB clock of 3.0 GHz would be needed. In most cases of high OC’s that result in crashes; the CPU-NB is usually the culprit.
I have constructed a table at which your CPU-NB should be at with ‘Y’ CPU Speed. Please note that there is a +/- 200 MHz difference for each step. In order to find your speed without my table, you can use my formula: CPU-NB Frequency (+/-200) = (CPU-Frequency * 2 ) / 3.15.
Highlighted areas are the recommended speeds of which to run the CPU-NB
As you can see with Table 3, these are the support frequencies of your CPU-NB at X CPU frequency. Of course, as you increase the CPU-NB frequency, you have to increase the CPU-NB voltage.
Let me put this in practice, before you start to debate my theorem.
Highlighted areas are the recommended speeds of which to run the CPU-NB
Now that you have seen actual data charts you can criticize my theorem, do not worry I already do it myself. In practice it does not work 100%. Actually I have Super Pi 1M, 3D Mark 06, PC Mark 05 and Geekbench charts as well showing that the 2800 MHz NB usually is top of the charts rather than the recommended speeds by my calculations. Which to me, is fine. The idea behind the formula is a rough estimate of what you should be at with ‘Y’ CPU Frequency.
What you should get from this section is an understanding of the importance of the CPU-NB and how it effects your overclocking process. By all means you should think about looking at the CPU-NB each and every time when try to push for a different CPU Frequency.
Can anyone elaborate more abt this?? dont quite understand 
In short, he's trying to say that for every MHz you increase on the processor, you need to appropriately increase the speed of the CPU-NB as well. Do keep in mind that raising the CPU-NB increases the Memory Read Latency (known as MRL); the proper way is to keep increasing CPU-NB speeds till you do not see anymore significant gain, then tweak the MAL lower with CPU-Tweaker or AOD.
Sep 22 2009, 08:28 PM
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) = CPU NB vid
Priming at 3.85 GHz right now, temps at 55C according to CoreTemp.
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