EvilClocker

Whats the fix to stop the screen from flickering when you overlock the 5970 ? appears it only does it in 2d mode.. soon as you get into game.. everything is fine..

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BlackHoleSon

Possibly an unstable overclock. have you tried it at lower clocks or something? What clocks does this occur at? did you alter the voltage or anything like that?

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EvilClocker

I found the problem.. appears you got to use AMD GPU Clock tool.. no issues now!

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bratboy

I seem to be having the same or simular issue. When I'm in 2d mode with my Sapphire 5970 OC I get this occational blip across the top of my screen. I'm only running one monitor and not overclocking above the cards default of 735/1010 setting.

I did notice at another forum where someone said that turning off ATI Overdrive fixed the problem. I have it turned on because I thought that was the only way the fan would auto adjust. Am I making an incorrect assumption and if I disable Overdrive will the fan still run in auto mode?

Dopamin3

Sapphire cards have a problem with fan control. You need to flash the card to a new bios in order to get automatic fan control to work. Check out this thread for more information: 5970 Bios Update for Fan Control Fix - Links Here

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Tech-Boy

Do you have the 9.12 drivers installed. And only one monitor right?

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skunksmash

HERE'S THE PROBLEM........

its not an unstable OC, it is due to the 2D clocks & is driver related.

as soon as you go 1mhz past stock the 2D clocks revert to 157/300 & ''bang'' artifacts everywhere....

ive opened tickets with sapphire & AMD about the matter.

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bratboy

Actually was aware of that thread & the bios problem but apparently newer cards from Sapphire are shipping with the right bios now. When I select "Manual" fan control, which the thread mentions does nothing with the wrong bios, I can tweak it all the way up to 100% and you can definitely hear the fan rev up. I went ahead and decided to turn off overdrive and un-check the manual fan option and ran a few benches. The fan shows in CC as increasing speed in response to temp rising and you can hear it speed up just fine. Disabling the Overdrive feature in CCC does seem to have fixed the flicker problem.

Actually have the 9.12 hotfixes installed and only one monitor.

Strange, in my case just turning off overdrive and leaving the clocks at Sapphires default of 735/1010 seemed to solve the issue for me at least. When I pull up CCC it does show my settings while in 2D as being 157/300 like you mention but the setting alone doesnt seem to cause the issue. Now maybe later on when I decide to tweak the card some more I'll run into the issue you netion but, at least for now, it seems I've solved my problem. If the problem starts showing again I'll update my post

edy604

Hello, I had the same problem with a Powercolor 5750 I would get a flicker on my second monitor when I tried to use the Overdrive feature. Turning 'off' fixed flicker but what good is that?

To FIX the flicker and use the overdrive; simply GROUP the 2 monitors together(if u have dual display) To group simply hit the upside down black triangle -> and choose "Create Group" in CCC -> Desktop and Displays.

I stumbled across this while trying to eyefini**** to work, to my surprise you need a monitor with "DisplayPort" which are still pricey or buy a $100 "Active" displayport adapter!!!

Hope this helps. I'd like to know if this fix works for anyone else