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Old November 23, 2008, 05:28 PM
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Default Diamond HD4870 1GB

I have Diamond HD4870 1GB in Vista 64.
In a few seconds after PC wakes up, screen flickers a second or two.
I did not notice that before, but since I got new install on P5Q-E I see the described behavior.
Is this a normal or abnormal behaviour? I have read somewhere that when 4870 switches from savings mode to normal mode something like that happens.
Any 4870 owners observe the described symptoms?
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Old November 23, 2008, 08:20 PM
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I had that happen when I had my 4870. The screen would flicker but never had any problems.
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Old November 24, 2008, 05:41 AM
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I get the same flicker on Vista x64 with with my 4870x2's, I never really put any thought into it. My cards work, and I have no issues with them. Seems its just a normal thing then.

I wouldn't worry, unless your card causing artifact's or crashing in games, chances are its fine.
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Old November 24, 2008, 10:24 AM
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Update.

Actually I found out that it flickers (like switching video mode and back) when:
1. PC woke up/started up.
2. Windows Explorer goes to the folder containing VOB files FOR THE FIRST TIME and the view is large or medium icons (so Windows did not build icons for the files yet). So, you copied VOB files from DVD and go to the destination folder for the first time.

I also noticed that the more VOB files in the folder, the longer screen flickers. It appears to me that as Windows builds/extracts icons it uses 4870 to do something (encoding?) and it causes screen to flicker.

So, it is not really related to the waking up, but possibly to video encoding?

Driver problem?

Any ideas?
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Old November 24, 2008, 10:26 AM
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I would say it is a Vista issue. I wouldnt worry about it.
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Old November 24, 2008, 05:39 PM
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Yeah, it clear now. Flicker happens right as the address bar on the top of Windows Explorer window gets filled with green thingy (builds icons/folder info) on VIDEO_TS folder.
Weird, just restarted computer, it switched to 1280x720 (reported as max supported regime). Restarted again, back to 1920x1200. Windows/videodriver/media center update screwing with my PC?
Weird.
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