Posts Tagged ‘ phenommsrtweaker ’

Overclock your Phenom CPU Using Software

Well, I know it’s extremely easy to overclock an AMD Phenom Black Edition CPU. You just up the CPU multiplier and get your processor overclocked. You usually do it in BIOS or with AMD Overdrive under windows. Though AOD is an excellent tool to overclock, I find it very slow when applying settings. But there is an excellent light weight utility to overclock your CPU under windows – Phenommsrtweaker. Though I don’t like the name of the tool, I just like the functionalities it provides.

The Phenom overclock tool is light weight, fast and can be used to automatically set your Phenom CPU to overclock when needed. It’s a great tool and I just love it. But the disadvantage is that you can only use the tool with a Black Edition Phenom CPU to overclock. But I don’t think that’s an issue as many of us are already having a BE Phenom II CPU. (Update: It’s also possible to overclock a non BE CPU if the HTT and other things are set under BIOS. Thus, one can manipulate the multiplier under windows with this tool to automatically overclock any Phenom-family processor.)

Overclocking Your Phenom CPU with Software

Overclocking your Phenom II BE CPU is extremely easy under windows. I’m going to explain how to do that here. Before that, you need the following tools.

Prime95 (to test for stability)
HWMonitor (to check CPU temperature)
CPUz (to know if the COU is overvolted and overclocked)

To start off, disable C&Q from Bios as leaving it enabled causes instability.

Open Phenommsrtweaker, CPUz and HWMonitor and keep all windows visible all the time.

1. In Phenommsrtweaker next to “Core multis” you will see four boxes where you have the option to adjust the CPU multiplier. Increase the multiplier up one in all the four boxes (for me the default is 15, so I increase it to 16). And select Apply.

2. Check in CPUz if the CPU is overclocked. You can see it next to “Core Speed”.

3. You have to check your overclock for stability. Open Prime95, select Small FFTs and select OK. This will stress your CPU to the max. Run the test for a couple of hours. If the overclock is stable, your system should not crash or throw up BSOD.

4. If you find your overclock stable follow Step 1 again to increase the multiplier but this time up 0.5. Check if the overclock took effect in CPUz and do the same stress test again.

5. Continue doing the same until your system is unstable. Now you have found the max overclock your CPU gets to at stock voltage.

6. Now you have to see if you can get more overclocks with increased CPU vcore. In Phenommsrtweaker select the multiplier at which the CPU was NOT stable. In the box next to “CPU VID” you can adjust the CPU vcore. Increase it one notch and select apply. If the CPU vcore doesn’t change, increase it again and apply to see if it changes. If it changes, well and good (it has to change in the next one or two increments) , you can continue to step 7. If vcore doesn’t change try increasing “NB VID”. In some motherboards changing the “NB VID” affects CPU voltage.

adjusting vcore

7. Stress test using Prime95 to confirm stability. If the system crashes during the test, increase the vcore up one notch or until the system properly runs Prime95.

8. To find out if your CPU can overclock more, follow step 6 until your CPU no more responds to increased vcore. This is the max overclock you can get.

Note: Always stress test your CPU for at least 2 hours to make sure the CPU is stable.

Some Thoughts:

Overclockers overclock the CPU to improve the system performance. They often do it at the cost of power consumption and increased heat. As overclockers have to turn off Cool & Quiet for stability, they have to run the CPU at the max OC resulting in increased power usage even when the system sits idle.

This had been bugging me for a long time until I realized Phenommsrtweaker could be used to automatically manipulate the P-states of Phenom processors if and when needed.
For most of us, power consumption may not be an issue. But what if you can automatically overclock your Phenom II CPU when needed without compromising on stability and power consumption?

I have explained in my previous post how to use Phenommsrtweaker to automatically overclock your CPU when the demand arises. I’m using it for quite a some time and it works perfect. I would also like to recommend that to others who want to overclock but don’t want their systems to consume more power when idle. Finally, this is not an extensive AMD Phenom II overclocking guide, but will give an idea how to OC a Phenom CPU under windows. UDABC4YQNPWH

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Overclock your Phenom CPU and Save Power Simultaneously

Who said you can’t overclock your CPU while being a greenie? If you think you can’t, the “answer” is the other way around.

You would have heard that you must disable Cool & Quiet (for AMD) when overclocking for stability. UDABC4YQNPWH Those who overclock do so to improve system performance at the expense of power consumption. But I’m going to show you how to conserve power even while overclocking.

An Automatic Overclock for your AMD Phenom CPU

Before continuing, I must give credit to this poster from whom I’ve taken the idea of using Phenommsrtweaker to run the CPU in different P-States.

What is needed for this:

1. You must have an AMD Phenom Black Edition CPU.

2. And an AMD/ATI 790GX/FX or 785GX motherboard.

3. Phenommsrtweaker.

As you might know, a Black Edition CPU from AMD has its CPU multiplier unlocked so that you can simply increase it to overclock the processor but while doing so, you mostly have to disable C&Q for stability.

There is a nifty utility with which you can overclock the CPU easily, called Phenommsrtweaker. It doesn’t only let you OC your Phenom BE but also set customized P-states. If you know how to exploit this, you can set the CPU run at power saving mode when it’s not used much and OC it (to the max, the CPU allows of course) automatically when it has to work hard.

To automatically overclock the CPU only when needed, do the following;

I’m not showing here how to find out the max CPU OC (Update: Refer to know how to overclock your Phenom CPU). Since I already know my CPU runs stable at 3.6GHz with 1.376v, I’m going to use this. You must find out the max OC your CPU allows.

Necessary tools

  1. Phenommsrtweaker.
  2. CPU-z – To check the CPU clock
  3. HWMonitor – to monitor the CPU tempertaur
  4. Prime95 for stress testing


1. Keep everything at stock in BIOS including the CPU clock and voltage.

2. Enable Cool & Quiet in BIOS (It’s already selected by default).

3. Select “Balanced” in Power Options. (Under Windows)

4. Open CPU-z and see if the CPU runs at 800MHZ. Note down the Core Voltage.

Phenom CPU when Idle

5. Reboot the system and disable Cool & Quiet in BIOS.

6. Under Windows, set “High Performance” in Power options.

7. Open Phenommsrtweaker. Under P – state 1 set 4.0 in all the four or three or two boxes (depending on the CPU if it’s X4, X3 or X2 respectively) next to “Core multis” and the voltage you found in step 4. You may have to use “CPU VID” or “NB VID” depending on your board (I had to adjust the NB VID to increase the CPU voltage). Click Activate and Apply.

Phenom Power saving state

Tip: Keep CPU-z open while doing this so that you can see if the voltage you noted down is reflected in CPU-z.

4*200=800. Now your CPU runs at 800MHz. Fire-up Prime95, select the first option (Small FFT) and run it for 20 minutes. If you did everything correctly, you won’t see a BSOD.

8. In Phenommsrtweaker under P – state 0, set your CPU milti and the voltage (you might have to use “ND VID” for reasons explained in step 8 ) at which the CPU OC is stable. Click Activate and Apply.

Phenom P0 state

9. Now Select Services Button in Phenommsrtweaker.

10. Select the check boxes next to “Select custom P-state settings permanent” and “Enable custom “Cool & Quiet”.

Phenommsrtweaker services window

11. Don’t change anything in the last 4 boxes and select Apply.

To see if the changes took effect, reboot the system, open CPU-z and check the CPU speed. It should be 800 MHz when you do normal tasks such as browsing and using MS Word etc. When you convert video, audio, play games or anything strenuous to the CPU, it will automatically overclock to what you set it to (in my case it’s 3.6GHz).

The above image shows the CPU runs at 800MHz with reduced vcore when doing normal tasks.

The image below shows the CPU is automatically overclocked when needed.

Overclocked Phenom CPU under load


Overclocking is not for everyone. If you don’t know how to overclock, don’t try it. Chances of damaging your hardware when overclocking is substantial and I won’t be responsible if you fry your hardware.

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