Stripes and flicker on screen when mining

[codymanix]

Hi I have bought a new graphics card (Radeon HD 5850).
But when I start mining, my computer start to get unusable. Just a few seconds after starting mining, stripes fill the whole screen, then a few seconds later the whole screen is blue, then later I see the desktop again, later there are different stripes it is always changing.
The windows cursor is showing strange pixel artifacts. The Computer gets unusable and I have to reboot.

The strange thing the card work well when playing GTA IV at high setting, so what can be wrong?

Iam using Guiminer with Phoenix/Phatk. I have a Chieftec GPS-500AB 500W Power supply, and a MSI 770-C45 mainboard.

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[mmavipc]

Hi I have bought a new graphics card (Radeon HD 5850).
But when I start mining, my computer start to get unusable. Just a few seconds after starting mining, stripes fill the whole screen, then a few seconds later the whole screen is blue, then later I see the desktop again, later there are different stripes it is always changing.
The windows cursor is showing strange pixel artifacts. The Computer gets unusable and I have to reboot.

The strange thing the card work well when playing GTA IV at high setting, so what can be wrong?

Iam using Guiminer with Phoenix/Phatk. I have a Chieftec GPS-500AB 500W Power supply, and a MSI 770-C45 mainboard.

Try updating your drivers? Is it overclocked at all?

[codymanix]

The card was overclocked by the vendor, as far as I know. My catalyst control center is up to date.

I find it strange that GTA runs very good with the card, but as soon as I start mining my desktop get destroyed

[Aristotle]

Not a good sign.  That's what video cards do when they're damaged, or the voltage/clock settings are off.  Check the temperature to make sure it's not overheating.

[EyeRis]

Yuo have either an over heating GFX card or an insufficient power supply.

[Bitslizer]

Yuo have either an over heating GFX card or an insufficient power supply.

+1

[Gabi]

Something is definitely wrong!

Check your temperatures!! You can use GPU-Z for that

[snorbit]

I had a similar issue, had to upgrade from a 450watt psu to a 600watt one to fix it.

[codymanix]

Shouldn't 500 Watts be enough? Temperature was OK, if I remember correctly it wasn't more than 80 degrees celsius.

How can I check or the voltage settings? I have never done this before.

[freedominnumbers]

Stripes and back to desktop/application indicates a memory issue. Reduce the memory clock and see if that fixes it. If you are at manufacturer clock rates you should RMA. Bad memory happens.

[codymanix]

I tried to underclock memory but it didn't help either.

[alepintchap]

You shouldn't be using your computer when mining... But you could get another graphics card and mine using only one of them while you're using your computer.

[Jessica]

Cool down your graphics card.

[Stupidpal]

Definitely a case of overheating.

[brocktice]

I have the opposite problem, I have a card that causes flickers whenever I'm *not* mining. Any ideas? Using Linux.

[brocktice]

Never mind, apparently this is a known bug in fglrx 11.6, an upgrade to 11.7 fixed it.

[guci22]

Your powersupply may be insufficient. I would look into its wattage and your card's reccomended.

[leeloulee]

Im getting that on my 6950 after i changes screen resulution...

[ian209]

I had the same problem with Cat 11.6. Updating to 11.7 solved it.