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Crazy Flickering

Originally Posted by Poppinj View Post
This is caused by having an ATI card and running dual monitors. This occurs whenever the memory frequency changes, which changes when the card switches core/mem frequencys from 2d, to high perf. 2d to 3d. The solution is to make the memory speeds the same across all three modes. 10.10 fixes this problem for the card but anything after 10.10 will use dymanic frequencys. 10.10 sovlves this problem by making the memory run full speed the entire time. This casuses extra electricity and heat but will solve the problem... unless you overclock. Then you will still see flickering when the card goes into 3d mode and your OC kicks in.

Fix this issue with drives after 10.10 by creating a profile in CCC and manually setting the frequencys for the profiles you created. The profile you created can be found is (Im doing this from memory but its close) uses>your user name>ATI
>ACE>profiles. Then edit the profile you created.

1. Open CCC
2. Unlock and Enable Overdrive if they aren’t already.
3. Go to Options/Profiles/Profiles Manager. Create a new profile. Under composition make sure “ATI Overdrive” is checked. Save and Close, DO NOT ACTIVATE.
4. In windows go to: C:\Users\{yourusername}\AppData\Local\ATI\ACE\Prof iles (you will need to have “show hidden files” turned on for this)
5. Open the xml document with the name of the profile you just created (notepad is fine)
6. Change the values of the Clock and Memory speeds to look like this (these specific values are what worked for me and my card, use judgment) EDIT ONLY THE BOLD VALUES.

Feature name="CoreClockTarget_0"
Property name="Want_0" value="20000"
Property name="Want_1" value="60000"
Property name="Want_2" value="85000"
Feature name="MemoryClockTarget_0"
Property name="Want_0" value="50000"
Property name="Want_1" value="90000"
Property name="Want_2" value="120000"

7. Save and close. Go back to CCC and activate the profile you just created.
This will make the card idle at 400core, 900memory. (2D clocks are the "Want_0" values)

I found it best to edit want 0 and want 1 (both mem and core) to match, that way it only flickers when it goes to 3d and you get your energy/heat savings. Dont go to low or your computer will crash. If it does boot into safe mode and delete the entire ATI folder, disable CCC from startup, then boot like regular and remove and reinstall CCC. Anything over 300/600 should be fine.

Edit: here are some pretty good instructions.


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