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Need some help with SLI

Post Date: 2009-05-26
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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Topic: Need some help with SLI
    Posted: 26 May 2009 at 5:23am
Hello everyone,  It's been awhile since I've been on this forum.  Well I just noticed that I'm having some color issues while in SLI mode.  In games only there is a major color change and for some reason when I took a screenshot of it, it looked normal.  (No strange colors), so I could'nt show you guys.  The color seems too red and blue (kinda hard to explain).
So what I tried was to disable SLI and when I went to a game, the colors were normal. 
So what's going on?  Is there something wrong with the SLI adapter, or the graphic card?  I haven't taken any of them out yet.  I just disabled SLI.

Now the color is just fine doing everything else with the computer.  Just games is the problem area.  Internet, other programs are fine.

Thanks for your help
Brian 


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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Posted: 26 May 2009 at 8:39am
ok ill try the driver... heat issue might be a problem.   both are at 60 right now.
Antec 900 case
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Kliebor2 View Drop Down
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Posts: 659 		  Quote Kliebor2 Quote  Post ReplyReply bullet Posted: 26 May 2009 at 4:44pm
60 Centigrade is pretty normal for an nVidia card, that chip set runs hot, sometimes really hot... usually most nVidia's start to artifact between 70 and 80 Centigrade depending on the chip

Dave Ouch
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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Posted: 26 May 2009 at 11:09pm
ok thanks for that info... well the temps went down once i put both fans at 100%, they were at 70% earlier.  Now they are at 55 and 56
The only thing now is too try a older driver.  I have the newest drive for the 8800gts and I never had a problem until now with the driver or cards.
 
I do have a questions though.... what are the signs that your card is going bad or is bad? 
Antec 900 case
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Zalman 9500 CPU cooler
8400 3.6
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1 Evga GTX 465
24" Samsung LCD

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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Posted: 27 May 2009 at 4:54am
Well I just reverted back to the 182.06 driver not the .50 driver.  Still there is the same problem of color.  Now I just noticed that ... I think Im not getting black.  Well when a screen needs to be black its red.  or reddish.  the temps are good still

OK, why is the black red now?
Antec 900 case
Nvidia 750i FTW Motherboard
Zalman 9500 CPU cooler
8400 3.6
2 gig of 1066 ram
1 Evga GTX 465
24" Samsung LCD

3DMark06= 17,360
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Kliebor2 View Drop Down
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Posts: 659 		  Quote Kliebor2 Quote  Post ReplyReply bullet Posted: 27 May 2009 at 6:36am
The only reference that seems common to yours is a problem a few users had with the DVI input on their LCD monitors a couple of years back.
 
I would try two things.
 
First:
 
Turn off SLI and leave the monitor plugged into card 1 and reboot.
if the color problem is still there power down, plug into card 2 and boot up.
If the color problem persists move on to step 2
 
Second:
 
Power Down again
unplug the DVI cable and find your VGA cable, use that to connect your monitor to card 1 (top card)
 
Power up, if the color problems persists repeat plugged into card 2.
 
If they stop after swapping cables, renable SLI and make sure all is still ok.
 
Sometimes ports can go bad... it could be a bad DVI connector on your monitor.
 
If nothing works, I would suspect one or both of the cards have some problem.
 
Your driver versions should be fine, I have used both of them with no issues on my rig.
 
Dave Ouch


Edited by Kliebor2 - 27 May 2009 at 6:37am
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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Posted: 27 May 2009 at 7:04am
Well I just tried the first step.  turned off SLI, rebooted, and then tried a game.  Well the colors are normal with only 1 graphic card..
I just tried again with SLI and this is were the colors are bad.  So what Im thinking it's only happening while in SLI not single GPU mode
Now for the second step....
Antec 900 case
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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Posted: 27 May 2009 at 7:32am
ok ok.... this is weird..ill go step by step what did...
First I turned the puter off then then unplugged the DVI cable from the top graphic card.(for the some reason my cards only have DVI outputs NOT VGA)
So anyways then I unplugged the cable from my monitor, unplugged the power of the monitor ... waited a few minutes...and then plugged the monitor power and DVI cable back in.  Next I plugged the DVI cable into the bottom graphic card and booted up...  Nothing was on the screen so I .... (while the puter was still running) plugged the cable back into the top graphic card. 
This is when I noticed that the resulution was all wrong and big.  So I checked under properties and noticed that I now have 2 monitors listed not just one as before.  and neither was at the right res for my 24" monitor.  Sounded tooo strange so I booted again and noticed that once booted the res was correct for
The 24".  Now I still have 2 monitors listed... the #1 is the one Im using.  why did that happen that I now have 2 monitor listed?????

OH and did I mention... that the colors are back to mornal under SLI???

Antec 900 case
Nvidia 750i FTW Motherboard
Zalman 9500 CPU cooler
8400 3.6
2 gig of 1066 ram
1 Evga GTX 465
24" Samsung LCD

3DMark06= 17,360
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Kliebor2 View Drop Down
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Posts: 659 		  Quote Kliebor2 Quote  Post ReplyReply bullet Posted: 27 May 2009 at 9:17am
Normally disabling SLI simply sets up the two cards to operate individually, thus you can plug the monitor into either card and should get a good picture, res may be not set properly for the second card until you set it, but it should work.
 
If the second card gives no signal at all it is perhaps bad, or maybe needs to be reseated.
 
As to why SLI is ok now, I have no explanation, perhaps the monitor drivers were corrupted and unplugging and replugging it back in caused windows to reinstall the default monitor drivers for windows?
 
As to VGA ports, the card should have come with VGA to DVI converter plug allowing you to use a VGA cable that should have come with your monitor. The only reason I suggested that was other stories of people with blacks shifting to red had some issues with the DVI port on their monitor.
 
Certainly sounds weird.
 
Dave Ouch


Edited by Kliebor2 - 27 May 2009 at 9:18am
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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Posted: 27 May 2009 at 11:01am
yeah it does ... but thanks for your help
windows didn't install the default drivers... i still have the same ones from earlier.
BUT hey.... its fixed :)
Antec 900 case
Nvidia 750i FTW Motherboard
Zalman 9500 CPU cooler
8400 3.6
2 gig of 1066 ram
1 Evga GTX 465
24" Samsung LCD

3DMark06= 17,360
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brian View Drop Down
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Posts: 505 		  Quote brian Quote  Post ReplyReply bullet Posted: 31 May 2009 at 12:45am
Well the problem came up again.... but this time I did change out the cables.  And it fixed the problem of colors being weird. 
BUT what is the real difference in the VGA and DVI?  Am I going to see a decrease in quality?


Edited by brian - 31 May 2009 at 12:46am
Antec 900 case
Nvidia 750i FTW Motherboard
Zalman 9500 CPU cooler
8400 3.6
2 gig of 1066 ram
1 Evga GTX 465
24" Samsung LCD

3DMark06= 17,360
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Kliebor2 View Drop Down
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Posts: 659 		  Quote Kliebor2 Quote  Post ReplyReply bullet Posted: 31 May 2009 at 6:49am
The difference is minimal, the main difference when in analog mode (Using VGA cable)
 
  • color saturation and adjustment become available on most monitors, they are not automatically adjusted like they are in digital mode. This sometimes results in a need to tweak color settings to get optimal display.
  • There is a slight speed difference (on the order of a few milliseconds) sometimes noticable to the human eye as a slight delay on lower quality monitors, usually not visible
  • There can be some signal distortion from RF interference sources like cell phones or cordless phones, microwaves and the like that will be apparrent as herringbone patterns in the picture displayed if such sources are too close to your monitor.
  • The Analog to digital conversion in some rare cases can cause digital artifacts (blocky graphics) in very rare instances
 
For the most part there should be no real noticable difference other than now having the HSV/RGB settings on your monitor now available.
 
Hope this helps.
 
Dave Ouch


Edited by Kliebor2 - 31 May 2009 at 6:50am
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