clevo p370em 7970 xfire differing voltages

Hello,

I have a issue with my Clevo P370EM with Crossfire 7970M. When playing any games with crossfire enabled and a single/clone display I get terrible tearing and flickering. This issue goes away when I switch to extended desktop and leave crossfire enabled.

I checked both cards with GPU Shark and noticed the voltages differ between the two. Could this be part of the issue I am experiencing when using a single monitor / clone display?

Has anyone flashed the vbios on the cards in their P370EM? I am tempted to try to force the voltage to the same value on both cards to see if that makes any difference. Any tips with this?

 

Just curious if this is a new system? Been trying to decide myself to buy one? By clone display you mean you hook it to a external monitor correct?

 

This is a brand new system, received it yesterday and thats when I noticed the issues with crossfire. Clone display is where I have the laptop connected to a external monitor and I clone the laptop display on the external monitor.

 

Do you have the latest drivers I believe a new set came out last week?

 

Yes I have 13.1 installed currently.

Even more weird after hooking up a additional display I dont experience this issue again with a single display until after I reboot the laptop...

**edit** spoke too soon, attempted a new fresh install of windows and used 13.1 drivers and now the issue is back with a single monitor or dual monitors....this is very odd...

 

Here is a video of what I am currently experiencing.

 

Tried Windows 8 with 13.1 and having same issues. Nobody has any tips?

I also tried flasing the vbios on both cards to lock the voltage at 1.0 and 1.050 which worked according to gpushark but no change on the flickering issue.

 

This might sound counter intuitive but what happens when you overclock them (even by a few Mhz).

 

No change, tried bumping it up a few mhz and tried a dell OC bios that bumped them up to 900/1250. Still get the same flickering issue with crossfire enabled. Think it may be the crossfire cable?

 

Possibly, worth re-seating the cable if you can.

Also can you try another program that can monitor voltage like GPU-Z?

You could also try using -xcl on afterburner and create your own clock profiles in CCC.

 

Attempted to reseat the cable with no change when testing. I installed GPU-Z however I cant seem to find the voltage listed under sensors, or a option to add it.

Happen to know of any tools to benchmark each card individually? Swapping them in slot one and testing each individually and both cards test fine from what I can tell in 3dmark11/furmark. I found a tool to fill the memory however no matter which card I select it seems to only fill the memory on the main card (also tested this with each card in the main gpu slot and 0 errors). System will not boot with a card in slot 2 only.

Im thinking its either the crossfire cable or the secondary GPU slot at this time as each card tests fine individually.

 

Faulty crossfire cable, replaced by the company I purchased the notebook from without issue. They were even nice enough to rush return ship it to me so I had it for a LAN party I was hosting.