Step by step guide - Overclocking ATI and undervolting Core 2 Duo in Vista (+results

[Mimino]

Originally Posted by Destiny

blackbird, or just write it down and post for everybody

lol good one!
as far as i can see there are several power management profiles u can choose from and modify them, i have multipliers of 6,7,8,9,10 i believe.

[blackbird]

Originally Posted by Destiny

blackbird, or just write it down and post for everybody

alright im on it

[blackbird]

DO THIS AT YOUR OWN RISK, I AM NOT RESPONSIBLE FOR ANY DAMAGE CAUSED

PART 1

Download and install RMCLOCK from here

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If you already have this version installed then do nothing, if you have an older version look inside the RMCLOCK folder and there will be a registry entry called "Wipeout" double click that and then download RMCLOCK from the link above.


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Download ORTHOS, a cpu stress utility from here. This will be used to stress test your cpu to see if its stable after undervolting.


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Now that you have both programs, go ahead and run RMCLOCK (without any modifications to the voltages) and go to its CPU info tab, keep this window open and now run ORTHOS and select the test "Blend - Stress CPU and RAM" and click start.

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Keep running the test for 10 minitues and notice the Core Temp displayed in RMCLOCK window...pretty high isnt it.



Mine hits 90C under full load !

Now click on stop and then exit to close ORTHOS, if you just click on the close button it will minimize to system tray.

PART 2

Go to RMCLOCK and select the "Advanced CPU settings" in the left pane



Make sure "mobile" is selected and the box for "apply settings...startup" is also ticked. Hit apply and you might have to restart just RMCLOCK or your PC, do so.

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Go to RMCLOCK, expand the "profiles" menu and select "performance on demand"



Check "Use P-state transitions (PST)" for both AC power and Battery. Then check each of the multipliers 0, 1, 2, 3, 4,......In my case I only have till 4 but you may have more or less depending on your CPU.


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Head over to the "Profiles" main menu...meaning click on Profiles only.



Here change the Current Profile to Performance on Demand for both AC and Battery, leave the Startup Profile to No Management (this is in case your undervolt is not stable and it might give you a BSOD when you start up your PC, only set this to Performance on Demand after being fully sure that your undervolt is completely stable.)

Make sure all the Indexes are ticked

Uncheck the "Auto-adjust....VIDs"

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Now the lowest multiplier (in my case 6.0x) and its corresponding voltage is what the system will use to power the CPU during lightweight stuff or when its idle. The highest multiplier (in my case 10.0x) and its corresponding voltage is what the sytem will use to power the CPU during intensive stuff. The multipliers and their corresponding voltages in between are for the intermediate steps.

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By default my lowest was at 0.937V and the highest was at 1.250V.

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What you want to do is to change your highest multiplier to a lower value than the original go down in steps, or if your impatient in steps of two.

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Hit Apply, go to the CPU info tab, run ORTHOS again and monitor the temps. Note, ORTHOS will say ERROR and STOP if the CPU is unstable (this means your voltage is too low and you will have to make it higher in RMCLOCK)

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Run ORTHOS for about 40 min per voltage test (I know most of you will just lower the voltage down by a **** load, run ORTHOS for a couple of min, see no errors, will be happy) Don't do that, fine you can lower the voltage by a **** load if you really want but dont run ORTHOS for a couple of min, errors take some time to show up if there are any.

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Once you have a stable voltage for the highest multiplier, you can lower the multipliers in between to a lower value (not higher than the maximum voltage)

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Now you can enable RMCLOCK to automaticaly start with WINDOWS through the Settings tab, also if you are sure your undervolt is stable you can change the Statup profile to be Performance on Demand as well. This way whenever your laptop starts up you will always be using the undervolt.

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The other profiles like maximum performance, power saver.... are there if you only want it to run your laptop in one profile...not recommended, the performance on demand is a dynamic profile which will adjust the cpu and voltage to your needs.

PART 3

Be happy (my temps a bit higher, normally its 62C, its high since I just ran ORTHOS a min ago with the default voltage to get the pic for this thread)





Kewl ey drop from the 90's to the 60's

As far as I know RMCLOCK must remain running for the undervolt to be in effect, also if you dont like having two battery icons when your on battery power (rmclock's and windows), go to RMCLOCK battery info main menu and select Hide OS Icon

[Mimino]

great, great guide! will rep u when i can again! lol

[Mimino]

hmm...for some reason i do not have voltages lower than 1.00v but even at 1.25v my temps do not go over 80C

[blackbird]

you sure the cpu type says mobile (under advanced cpu)...look at 2nd image

[Meetloaf13]

I couldn't get my rig stable under 1.0. And my temps peak around 60C, so I wouldn't worry as much about it. But blackbirdis right, once mobile was checked, I saw sub 1.0 readings.

[Mimino]

nope the mobile thing is checked...when i tried setting it at 1.000v my laptop just restarted itself...too low i guess.

[Kierkes]

My rig is stable at minimum voltage all through.

[Voodoofreak]

Originally Posted by BiG_V

nope the mobile thing is checked...when i tried setting it at 1.000v my laptop just restarted itself...too low i guess.

Same thing happened to my G1s when i tested 1.000v. The lowest setting I can use is 1.125v. I tested it out for good 2.5 hours and everything seemed very stable. The temperature drop is quite noticeable (approx 10-12C).