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Going around ATI HD PowerPlay Voltage/Clock


New Member
Dec 4, 2005
16 (0.00/day)
Europe, Serbia
Processor Intel Core T7200 2.56Ghz @ 3.368
Motherboard Asus P5K P35
Cooling CM HyperTX
Memory 2x1Gb Kingmax Mars DDR2 1066 + 2x1Gb Kingston HyperX 1066
Video Card(s) EAH3850 512Mb BiosOC 760/1008
Storage WD 640Gb + USB 2.5" WD Passport 250Gb
Display(s) Philips 200vw 20"
Case CM Centurion2
Audio Device(s) Aureon 7.1 + Logitech X550
Power Supply CM RealPower 620 Modular
Software Win XP Pro SP2
Benchmark Scores 3DMark2006 = 11280
You have to disable PowerPlay for HD3870 / 3850, it is not so easy to do.
How to properly set your card up to not use powerplay which causes
stuttering and low performance.

Go to the directory,
(Windows XP) C:\Documents and Settings\Administrator\Local
Settings\Application Data\ATI\ACE
(VISTA) C:\Users\Administrator\AppData\Local\ATI\ACE

Keep that directory open.
Start up catalyst control center.
Hit the Overdrive tab.
Hit the paddle lock image to enable the overdrive settings.
Hit the profiles tab at top of page.
Select profiles manager from drop down list.
Name a profile in blank box (FixPlay is my chosen name), under "this profile
includes" section at bottom of page select the dot for "the following
settings". (In the tree make sure only ATI Overdrive checkbox is selected.)
Hit the save button.
Hit the Activate and close button at bottom of page.

Now go to your open directory
Go to the directory,
(Windows XP) C:\Documents and Settings\Administrator\Local
Settings\Application Data\ATI\ACE
(VISTA) C:\Users\Administrator\AppData\Local\ATI\ACE

You should see 5 new files in there in total.
One file is the same as you named your custom profile, right click it and
select edit (my file is called FixPlay.xml)

The file will open in notepad where you can now change settings to nullify

Here are my new settings for example, I have increased the core speed to
776Mhz (from defaults 300MHz) and voltage to 1,300V in 2D mode, and applied
a overclock to the 3D modes for the GPU (852MHz, increased the voltage to
1,315V) and for the memory (1200MHz). I also increased the fan % to 100%
from 41%.
Please, be careful with increasing the voltage it may damage your GPU, also
note that high overclock may lead to overheating and damaging your card

<Caste name="Graphics">
<Group name="Overdrive5">
<Feature name="CoreClockTarget_0">
<Property name="Want_0" value="77600" />
<Property name="Want_1" value="85200" />
<Property name="Want_2" value="85200" />
<Feature name="MemoryClockTarget_0">
<Property name="Want_0" value="112600" />
<Property name="Want_1" value="120000" />
<Property name="Want_2" value="120000" />
<Feature name="CoreVoltageTarget_0">
<Property name="Want_0" value="1300" />
<Property name="Want_1" value="1315" />
<Property name="Want_2" value="1315" />
<Feature name="MemoryVoltageTarget_0">
<Property name="Want_0" value="0" />
<Property name="Want_1" value="0" />
<Property name="Want_2" value="0" />
<Feature name="FanSpeedProtocol_0">
<Property name="FanSpeedProtocolProperty" value="Percent" />
<Feature name="FanSpeedAlgorithm_0">
<Property name="FanSpeedAlgorithm" value="Automatic" />
<Feature name="FanSpeedRPMTarget_0">
<Property name="Want" value="0" />
<Feature name="FanSpeedPercentTarget_0">
<Property name="Want" value="100" />

Make your changes, close and save changes to the file.
Right click the file choose properties and change the file to read only. You
are done.

If you restart your computer, just make sure to open catalyst and ensure
that your profile is activated. Simple once done.
Last edited:
Apr 21, 2005
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System Name MY PC
Processor E8400 @ 3.80Ghz > Q9650 3.60Ghz
Motherboard Maximus Formula
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Video Card(s) HD 2900 XT 858/900 to 4870 to 5870 (Keep Vreg area clean)
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Software XP Pro SP3 to Windows 7
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