BSODs overlocking 6950 CF with MSI Afterburner

[Kasc]

Hey all,

Installed my 2nd 6950 today and I'm getting some problems.

Both the cards have been unlocked and singularly they can both handle 900/1375. When I got my 2nd card I uninstalled the current and put the new one in to unlock. I then put my older one back in and clocked them to 880/1375 this played games nicely and I noticed even the top card was only at 72C so I decided to whack it up to 900Mhz. This caused a BSOD but because I had set up MSI to overclock on startup I couldn't boot up normally anymore. Instead of booting up in safe mode I decided to reformat because I'd already backed up ready to do so.

After installing drivers I reinstalled MSI but now even when I try to go back to 880/1375 I get a BSOD as soon as I hit apply. When I overclock with CCC I don't BSOD when I go to 840/1325 (the max). However if I try to do the same overclock in MSI I still BSOD...

The BSOD refers to atikmdag.sys but I haven't read it in-depth.

All this is at 1125mV.

Cheers,
Joe.

 

[Surveyor]

What power supply do you have?

It might not be up to the job.

 

[Kasc]

Antec 750W

This,

 

[trigger-happy]

is the power control settings maxed out on both cards? push the slider all the way to the right.

 

[Kasc]

It was/is.

 

[GJ02]

Read up on disabling ulps
Here you go

 

[Surveyor]

Antec 750W

This,

Should be enough.

 

[gareth170]

simple fix , disable Ulps

Go to registry :

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\ class \{4D36E968-E325-11CE-BFC1-08002BE10318}]

and change "EnableUlps" to 0 under the 0000 and 0001 and 0003 keys.

 

[Kasc]

Nice one, think that's fixed it, cheers guys.

 

[BaDBoY_uK]

BSOD while gaming? What game? If not, disable ULPS as stated

 

[Kasc]

I have not experienced a BSOD whilst gaming, no.