SLI and blue flickering

I just installed my second VGA . First everything looked fine but when i run 3dmark the screen was flickering. The test ended up 13000 points so that seemed fine.

Same thing with crysis. Alot of flickering but part from that it worked very well..

Assassin's creed worked ok. But that game doesn't use SLI, right?

Any suggstions

 

When i play crysis in a window on the desktop it works. I can have the window over the entire screen.. And it utililize SLI too. But i as soon i turn it to fullscreen it flickers.. ?

 

Did you set nVidia Control panel to use the application profile?

Someone else posted here who reported that he solved a similiar problem by interchanging the video cards.

[edit] See here: http://forum.notebookreview.com/showthread.php?t=238130

 

I'm going to try that.. Thanks.. But first what do you meen with "use the application profile"

 

if you installed the second card make sure it has that paste ... it may be getting hot..

also if there are any pads on the heat sink.. make sure theres not a clear plastic film over it... that will also make your card hot..

i had a smiliar problem with my m9750 when i ordered the second card.. it had clear plastic on the heat sink pads.. making my card heat up...causeing lines on the 3dmark and making my pc shut off...

Didn't like the m9750 ,,,, now I'm with my sager... I love this machine...

 

No. Changing place of the cards didn't work..

And it's not a heat issue unfortunatly..

I've tested every driver one laptopvideo2go. Still flickering and less 3dmark points on every one.

I'm running vista 64 bit. Support said it could be some problem with the drivers and that new ones are coming out within a couple of weeks.

Is there anyone here that experienced anything similar.

 

In order to gloss over some of the failings of the current SLi, NVidia has created config files for apps that it knows are SLi-compliant so that the performance of the particular app under SLi can be optimized (e.g., some apps work better when each GPU works by itself on alternate frames, and some work better when both GPUs split the work on each frame).

For the vast majority of apps, however, since they haven't been validated under SLi or been optimized, there's a basic default config that is used when a non-validated app is run with SLi enabled.

My guess would be that in the NVidia panel there's an option to enable/disable the use of app-specific config files.

 

Maybe your LCD cable is loose, but usually the cause for flicker is a bad refresh rate or a bad driver.
I`d suggest moving on to a different driver,and find one that works for your particular system. It seems every system behaves differently with the same drivers...odd indeed,but that`s how it is.
I just switched to 174.82 and no more flickering,no screen tear,nothing. Try them, but be warned,you won`t be able to OC.

 

Here's an old post that seems to address the problems you describe.

The offered solution (removing the bridge cable) seems somewhat draconian, and may not even apply to today's machines, but it might be worth a try if nothing else works.

http://forums.nvidia.com/lofiversion/index.php?t19181.html

 

..........

 

???? not sure what you're getting at - yes, I am quite well aware that a detailed description of what I vaguely outlined can be had from NVidia, or many other places online - that level of detail wasn't necessary to pointing the questioner in the right direction.

 

It's never enough, until all of a sudden it's way past too much.

 

Aaaah! I tried i fresh install of xp 32 bit instead of my vista 64 bit. I gained 1300 3dmark points in SLI mode just by changing OS!

But Still Flickering!!!

 

Tried new driver as I sugested? 174.82 ?

 

Yes i've tried that one and about four others. Both in Vista and XP.

 

I don`t get it. 174.82 are CLEVO drivers. They should pretty much do the best for the system. And it`s still flickering?
Maybe it`s a loose cable or some issue in your power brick or fluctuations in your power grid....

 

As eleron911 says, you must have a loose cable connection on your LCD, or else you've got a defect in the AC adapter (either it's not feeding power correctly, or else the receptacle on the system that the AC adapter plugs into isn't working correctly).

 

No, the lcd cable is ok..

It could be a power thing but that don't explain that SLI works when i open Crysis in a window. I can cover almost my entire screen in a window if i run in 1900x1200 resolution and i get the same fraps as i get when i'm doing it in fullscreen but without the flickering.. So the SLI works and therefore it shouldnt be a defect ac adapter..

Everything is just really strange..

PCMW said that there been similiar problems and that they are working on a new vbios and drivers

I'm hoping this will help...

 

Looking at your signature, I see you're running the Q6700, which suggests that the problem may be similar to the stuttering that DTFrance was having when he enabled SLi on his 8700s.

Basically, my suspicion is that the flickering you're getting is caused at bottom by the substantially higher bus latency of the Q6700 resulting from coherency being maintained among the L2 caches on that chip. However, the fact that not everyone is suffering the same thing suggests that, in addition to the extra latency, there are other inefficiencies in the drivers you're using, and possibly also in your _Vista setup that, when combined with the extra bus latency, are causing the the GPUs to be just slow enough to cause degradation in either the frame buffering or the screen refreshing.

To ask some of the obvious questions you've probably already answered:
(1) have you terminated all unnecessary services and background processes, in particular _Vista's vexing indexing service?
(2) have you checked to see whether there's an inordinate amount of hdd access going on?
(3) have you turned off bluetooth and wireless? Each of these services routinely poll for available networks, and can cause performance degradation if there's nothing for them to connect to.
(4) how long has it been since you installed _Vista? _Vista has a new I/O interrupt management algorithm that is intended to increase the apparent quality of performance; however, the algorithm is designed to "learn" about your typical usage habits and adjust itself accordingly, and until you've used the current installation long enough for it to "train" itself to your usage habits, the default settings on the algorithm may actually decrease performance quality.

 

Yes I suspected vista so, as i said before, i formated everything and did a fresh install of xp 32 bit. And run 3dmark first thing. But flickering was still there..

I've tried to do minor downclocking of memory speed. enabled v sync in apps. Both has been succesfull for some.. but it didn't work.

It could be a hardware failure of the bridge cable (both cards separatly runs fine) But that doesn't explain that i can use SLI in crysis if i run the game in a window instead of fullscreen. If i use a 1900x1200 window in the game the load on he cards is higher than 1200x1000 in fullscreen. AFAIK anyway..

There must be a malfunctioning process that kicks in when you're running 3d apps in fullscreen mode which takes care of the signal (probably good) from the cards.

Really strange that no one else experienced that here though.. I guess that indicates that it's i a couple of different things that interacts and create this problem.. Q6700-driver-bridge cable-ac power???

 

Thank you.. Good luck