Overclock.net › Forums › Graphics Cards › NVIDIA › help with sli and dual monitors
New Posts  All Forums:Forum Nav:

help with sli and dual monitors

post #1 of 5
Thread Starter 
ever since i added the second 470 im having the hardest time getting both monitors to recognize correctly. both monitors are the same and the right one seems to always work fine but the left monitor is not recognized as a plug and play monitor and and is always reverting back to a low resolution.

is there any guides on how to set up dual screens while using sli?
Daily Driver
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k ASUS Hero VIII EVGA GTX 980 TI Corsair Ballistx Sport DDR4 16GB 
Hard DriveCoolingOSMonitor
Samsung 250GB SSD Custom Water loop Windows 10 enterprise XB270UH 
PowerCase
EVGA G2 750w Thermaltake Core P5 
  hide details  
Reply
Daily Driver
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k ASUS Hero VIII EVGA GTX 980 TI Corsair Ballistx Sport DDR4 16GB 
Hard DriveCoolingOSMonitor
Samsung 250GB SSD Custom Water loop Windows 10 enterprise XB270UH 
PowerCase
EVGA G2 750w Thermaltake Core P5 
  hide details  
Reply
post #2 of 5
Quote:
Originally Posted by whipple16 View Post
ever since i added the second 470 im having the hardest time getting both monitors to recognize correctly. both monitors are the same and the right one seems to always work fine but the left monitor is not recognized as a plug and play monitor and and is always reverting back to a low resolution.

is there any guides on how to set up dual screens while using sli?
1) How are the monitors connected? Both monitors to the first (main) card or one monitor to each card?
Try both.

2) What type of connections is used? From card's DVI output to monitor's DVI input?

3) Is the right monitor being the main monitor (Mon 1) while the left monitor is the 2nd monitor (Mon 2)?
Try this trick: keep the refresh rate of right monitor at 60Hz and use 59Hz for the left monitor.
post #3 of 5
Thread Starter 
Quote:
Originally Posted by windfire View Post
1) How are the monitors connected? Both monitors to the first (main) card or one monitor to each card?
Try both.

2) What type of connections is used? From card's DVI output to monitor's DVI input?


3) Is the right monitor being the main monitor (Mon 1) while the left monitor is the 2nd monitor (Mon 2)?
Try this trick: keep the refresh rate of right monitor at 60Hz and use 59Hz for the left monitor.
1 - both are connected to the card in slot 2 the other card is in slot 4 (bios says both cards are running at x16 via nf200 chip) I have tried all different combinations and nothing worked.

2 - both connected DVI to DVI

3 - left is the main and it is set at 59, 60 is not an option

also everything works fine when i put my old single 470 in. could be be a gpu problem?
Daily Driver
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k ASUS Hero VIII EVGA GTX 980 TI Corsair Ballistx Sport DDR4 16GB 
Hard DriveCoolingOSMonitor
Samsung 250GB SSD Custom Water loop Windows 10 enterprise XB270UH 
PowerCase
EVGA G2 750w Thermaltake Core P5 
  hide details  
Reply
Daily Driver
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k ASUS Hero VIII EVGA GTX 980 TI Corsair Ballistx Sport DDR4 16GB 
Hard DriveCoolingOSMonitor
Samsung 250GB SSD Custom Water loop Windows 10 enterprise XB270UH 
PowerCase
EVGA G2 750w Thermaltake Core P5 
  hide details  
Reply
post #4 of 5
Quote:
Originally Posted by whipple16 View Post
1 - both are connected to the card in slot 2 the other card is in slot 4 (bios says both cards are running at x16 via nf200 chip) I have tried all different combinations and nothing worked.

2 - both connected DVI to DVI

3 - left is the main and it is set at 59, 60 is not an option

also everything works fine when i put my old single 470 in. could be be a gpu problem?
-When the left (main) monitor reverts to a lower resolution, does this happen at startup only? In other words, after booting up into Windows Desktop, can you manually raise the resolution back to its native? If you do this, will it revert back again immediately after?

-When you added the 2nd GTX470, did you do a clean install of the newest driver? If not, do it.

-One way to check to see if the 2nd GTX470 is bad, try switching the 2 cards from their slots and see if the problem goes away or remains.

-When you said 'slot 2' and 'slot 4' with x16/x16 + NF200 in BIOS, it seems that you are using 3-way SLI mode for the two GTX470s. That is, the 2 red arrows in pic 1 below.
I would suggest you to use slots 1 and 3 instead. The 2 cards will run at x8/x8 but the performance loss going from x16/x16 to x8/x8 is so small that it is insignificant in gaming. And, using the NF200 will introduce a couple % latency as well and so this might just cancel out the already little benefit of x16/x16 over x8/x8.
This move might or might not relate to your current problem but is still a good move.

Edited by windfire - 8/5/11 at 1:46am
post #5 of 5
Thread Starter 
Quote:
Originally Posted by windfire View Post
-When the left (main) monitor reverts to a lower resolution, does this happen at startup only? In other words, after booting up into Windows Desktop, can you manually raise the resolution back to its native? If you do this, will it revert back again immediately after?

-When you added the 2nd GTX470, did you do a clean install of the newest driver? If not, do it.

-One way to check to see if the 2nd GTX470 is bad, try switching the 2 cards from their slots and see if the problem goes away or remains.

-When you said 'slot 2' and 'slot 4' with x16/x16 + NF200 in BIOS, it seems that you are using 3-way SLI mode for the two GTX470s. That is, the 2 red arrows in pic 1 below.
I would suggest you to use slots 1 and 3 instead. The 2 cards will run at x8/x8 but the performance loss going from x16/x16 to x8/x8 is so small that it is insignificant in gaming. And, using the NF200 will introduce a couple % latency as well and so this might just cancel out the already little benefit of x16/x16 over x8/x8.
This move might or might not relate to your current problem but is still a good move.

well i just finished switching out the 2 470's for my single 470 and still had the problem so i think it might be a faulty monitor. (I have 3 470's, 1 is solo and the other 2 are connected with a EK sli block)

when i put the sli set up back in after reinstalling drivers i was able to change the res to 1920x1080 in nvidia control panel but not under windows "change resolution" (right click option)

I activated sli and in BC2 and msi kombuster I can choose 1080 and it uses both gpu so i think my cards are ok but, in Borderlands the 1920x1080 is no longer an option

i also changed the the cards to slots 1 and 2

on the MIVE i can do sli on 1 & 2 and 2 & 4 because of the spacing with the EK sli block im using.

its still running x16 on 1 card and x8 on the other and still usiong the nf200 chip. That thing gets pretty hot so i would prefere not to use it and just run x8 on both if thats an option

last i guess i'll check with ASUS about a RMA since the are both registered with 3 year warranties and the oldest one was purchased in june of 09 so there both still under warranty.
Daily Driver
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k ASUS Hero VIII EVGA GTX 980 TI Corsair Ballistx Sport DDR4 16GB 
Hard DriveCoolingOSMonitor
Samsung 250GB SSD Custom Water loop Windows 10 enterprise XB270UH 
PowerCase
EVGA G2 750w Thermaltake Core P5 
  hide details  
Reply
Daily Driver
(10 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7 6700k ASUS Hero VIII EVGA GTX 980 TI Corsair Ballistx Sport DDR4 16GB 
Hard DriveCoolingOSMonitor
Samsung 250GB SSD Custom Water loop Windows 10 enterprise XB270UH 
PowerCase
EVGA G2 750w Thermaltake Core P5 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: NVIDIA
Overclock.net › Forums › Graphics Cards › NVIDIA › help with sli and dual monitors