Strange tearing at edges.

Liqourice · Oct 12, 2007, 07:24 AM

Hi.

Since last night I've started getting some strange tearing around the lower and right edge on my screen. The strangest part is that so far I've only noticed this in 3DMark05/06. I've tried 3 different games in different resolutions and they have been perfect.

This started happening after I accidentally set agp bus speed to sync with fsb speed when I overclocked so it went from 66 to 70MHz.

Is this related to that or is there some other issue causing this since it only seems to happen in 3Dmark.

Using ATI 7.9 right now btw.

Dyre Straits · Oct 12, 2007, 08:08 AM

I'd reset the AGP Bus speed to default. Most AGP Busses do NOT like anything over 66-67 MHz. That's why most motherboards allow the PCI and AGP Busses to be locked. PCI = 33 MHz; AGP = 66 MHz.

Liqourice · Oct 12, 2007, 05:50 PM

Quote:

Originally Posted by Dyre Straits

I'd reset the AGP Bus speed to default. Most AGP Busses do NOT like anything over 66-67 MHz. That's why most motherboards allow the PCI and AGP Busses to be locked. PCI = 33 MHz; AGP = 66 MHz.

I did but it's still there, that's why I had to ask what might cause this. I thought it could have been some resident error so I turned my computer off for 10 minutes. After that the first section of 3dMark05 was without this, before it happened at once, but then it came in the second test segment.

It's strange that it only happens in 3DMark, I've tested both DX and OpenGL games and it's not there.

Dyre Straits · Oct 12, 2007, 08:08 PM

Try reinstalling the 3DMark apps.

Liqourice · Oct 13, 2007, 12:38 PM

It's a longshot but I'll try that as well.

Liqourice · Oct 13, 2007, 06:05 PM

Deselected "Alternate Pixel Center" and the problem is gone.

Strange, as far as I remember I've had that on all the time so why would it suddenly cause this effect?

Dyre Straits · Oct 13, 2007, 08:47 PM

Quote:

Originally Posted by Liqourice

Deselected "Alternate Pixel Center" and the problem is gone.

Strange, as far as I remember I've had that on all the time so why would it suddenly cause this effect?

Hmmm...I can't recall ever selecting that option. At least we now know what was the cause of the problem.

Liqourice · Oct 14, 2007, 01:12 AM

Quote:

Originally Posted by Dyre Straits

Hmmm...I can't recall ever selecting that option. At least we now know what was the cause of the problem.

I may have accidently turned it on when I installed new drivers, or the driver package might have set it as default. Well, it works and it works well.

Oct 12, 2007, 07:24 AM	#1
Liqourice HardwareHeaven Senior Member Join Date: Nov 2005 Location: Stockholm Posts: 1,727 Rep Power: 98 System Specs	Strange tearing at edges. Hi. Since last night I've started getting some strange tearing around the lower and right edge on my screen. The strangest part is that so far I've only noticed this in 3DMark05/06. I've tried 3 different games in different resolutions and they have been perfect. This started happening after I accidentally set agp bus speed to sync with fsb speed when I overclocked so it went from 66 to 70MHz. Is this related to that or is there some other issue causing this since it only seems to happen in 3Dmark. Using ATI 7.9 right now btw.

Oct 13, 2007, 12:38 PM	Thread Starter #5
Liqourice HardwareHeaven Senior Member Join Date: Nov 2005 Location: Stockholm Posts: 1,727 Rep Power: 98 System Specs	It's a longshot but I'll try that as well.

Oct 13, 2007, 06:05 PM	Thread Starter #6
Liqourice HardwareHeaven Senior Member Join Date: Nov 2005 Location: Stockholm Posts: 1,727 Rep Power: 98 System Specs	Deselected "Alternate Pixel Center" and the problem is gone. Strange, as far as I remember I've had that on all the time so why would it suddenly cause this effect?