I swapped out my EVGA Triple SLI GTX 780Ti SC setup for EVGA Triple SLI SC Titan X's.  I am running triple ASUS ROG Swift screens.   The machine has plenty of cooling, as I'm using an Ascensions MountainMod case with 21 Noctua fans.  The TDP profile is the same between my old GTX 780 Ti's vs these Titan X's, so the thermal footprint has not changed.   The cards never get over 75C as I run the fans at 100% at all times.  Noise is not a concern for me since I wear headphones when I game.   I've been fighting random locks and crashes and can only narrow it down to being an issue with Triple SLI and not bad hardware.   I can run any of the TitanX's in double SLI or single card without any issues.  
 
In Triple SLI, there are some very odd things that happen.   For instance, when running MSI Kombustor, the app can only spin up one of 3 cards.
 
h t t p://i.imgur.com/Sq039yv.png
h t t p://i.imgur.com/2dgGXmn.png
 
With double SLI, the same benchmarks max out both GPU's as expected.
 
In 3dmark, performance on FireStrike seems low compared to my old setup, but FireStrike Extreme seems to scale acceptably.
 
FireStrike GTX 780Ti Vs Titan X:  h t t p://www.3dmark.com/compare/fs/4645116/fs/1143871
FireStrike Extreme GTX 780Ti vs Titan X:  h t t p://www.3dmark.com/compare/fs/4643893/fs/1073727
 
But most important, is the locking.  With Triple SLI Titan X, my setup crashes at random intervals, but never works for more than one hour.  GTA 5, Battlefield HardLine, FarCry 4, etc, nothing works reliably.  I am testing not overclocked with the most recent drivers from Nvidia.   I am using a EVGA TripleSLI v1 Bridge.
 
I'm out of ideas and am wanting it to be either a driver issue or perhaps needing the newer v2 SLI bridge that isn't available yet.
 
/frustrated

Did you check the manual for your mobo to make sure you have the cards plugged in the right slots?  I got bit with that where I had to move one of my cards down an extra slot.
 
Also I would try a cheapie SLI bridge that comes with mobos to rule that part out.

Ozy311
Why can't I post links to images or benchmarks?  The system is stripping out all URL's?!    Please copy and paste the URLs in my prior post and remove the spaces on the H T T P portion.
 
 

You have to have been a member for over 5 days (you have that covered) and show at least 10 posts, I think.  I still can't link because I'm only at 5 days.

You are correct.  I checked my manual, and it does say it comes with a 3 and 4 way.    I can also try to down clock the cards to non-SC speeds, which I think is 1000Mhz.   I'm unsure how I can determine if one card is at fault if they run fine in double SLI mode.  Any thoughts on that?

Scarlet-Tech
Grab the flexible two bridge, and try that to see if you can swap between cards.

I know you said the top was nearly the same, but you never mentioned your power supply, which can cause havoc if you are getting near the limits under full load. Running 2 way vs 3 would give you extra head room.

Why not watercool?i can see you trade out equipment a lot, but you obviously have the money ey and would greatly help you with lowering temps of your cards, giving them extra relief.

The power supply is an EVGA 1300G2.   I do not want to water cool because my air cooling is sufficient to sustain 75C or less and honestly I don't want to mess with that.   The TDP is the same between the 780Ti's and the TitanX.  It isn't a power supply issue.

Since a Triple SLI setup has 9 display ports, I need to know what Nvidia's official listing of what ports to use for triple screen NV Surround setup.   I tried one per card, and all 3 in a single card and it also had no effect.   On my GTX780Ti Triple SLI setup,  I had to do one per card because those cards only had one DisplayPort per card.

To me this sounds like a mobo not playing nice problem.  Double check in GPUz that all the cards are running at PCIe 3.0 x8 or x16 (under load).  If one card is running x4 then that's a problem and shouldn't be happening.  Also in case you have a really old BIOS, update that.  Ideally you could take your cards to a friend and have them try them out in a different mobo to see if tri-sli works right or not.
 
Also, what sort of  crashes is it?  DirectX crashes?  Does anything show up in the Event Viewer?  Does Afterburner show any of the "limits" in the monitoring going to "1"?  I had a problem a while ago where I was banging into the temperature limit and the card could only take it so long before it would crash.

2-Way titan x sc SLI here and I have to replug all the DP cables when I restart, otherwise the screen stays black after the bios logo and I also have to redo the Surround setup in the Nvidia Control panel every single time.
 
I forced Gen.3 in the Bios (Rampage IV Extreme) and I have also tried new DP cables.
 
When I go back to my 690's everything works fine 
 
 

AnonymousGuy
To me this sounds like a mobo not playing nice problem.  Double check in GPUz that all the cards are running at PCIe 3.0 x8 or x16 (under load).  If one card is running x4 then that's a problem and shouldn't be happening.  Also in case you have a really old BIOS, update that.  Ideally you could take your cards to a friend and have them try them out in a different mobo to see if tri-sli works right or not.
 
Also, what sort of  crashes is it?  DirectX crashes?  Does anything show up in the Event Viewer?  Does Afterburner show any of the "limits" in the monitoring going to "1"?  I had a problem a while ago where I was banging into the temperature limit and the card could only take it so long before it would crash.

I am using EVGA PrecisionX and I am hitting normal Power and Voltage limits.  GPU-Z also lists an SLI under that one category where it shows the TDP and voltage limit ceilings, but I've never known what that meant.
 
I am positive my setup is not hitting a temp threshold.  I run my fans manual at 100% on the cards and my 21 Noctua fans blow significant air through he system.  During the most abusive burnin tests, the hottest card never peaks 75C, which is usually the card closest to the CPU.
 
I will harvest some Eventvwr logs for examination.   I also have been having GPU-Z log to a file on one of the GPU's.  It doesn't seem to be able to log all three at once.

Interesting.  I just saw this in the manual that I may not have attached, but this may only be needed for Quad SLI.
 

Yeah if you are running tri SLI drawing that much power you need to plug in the extra PCI-E power or you will run into problems like you described.

Quite frankly, if you have not had the PCI extra power molex connector connected, you best be glad you haven't burnt your 24 pin connector to the ground.

Plug it in if you haven't and don't worry about the past. You are lucky at this point since old cards that took more power melted the 24 pin with more than 2 cards, hence why the extra power connector is on the board. Again, forget the past and connect it. If nothing else, you wasted a minute of your life and you will have ample power provided to the PCI lanes.



"• We recommend that you provide sufficient power when running
CrossFireX™ or SLI mode. See page 2-32 for details.
• While running at heavy loaded four VGA cards, ensure to plug in the 6-pin extra PCIe
power supply for stability.
• Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2/3 when
using multiple graphics cards for better thermal environment."

This is from the manual. It says 4 gpus, but it also refers to power running SLI in general. Hopefully thay can help.

In my opinion the statement should have said "3 or more GPUs".

Have you solved that issues with your 3 way titan x ? I want to get 3 of them also. I had the exact same problem with my 3 gtx 980 and I had to rma all my cards to make it work.

They were working alone and 2 way but 3 way was impossible.

Ozy311
I swapped out my EVGA Triple SLI GTX 780Ti SC setup for EVGA Triple SLI SC Titan X's.  I am running triple ASUS ROG Swift screens.   The machine has plenty of cooling, as I'm using an Ascensions MountainMod case with 21 Noctua fans.  The TDP profile is the same between my old GTX 780 Ti's vs these Titan X's, so the thermal footprint has not changed.   The cards never get over 75C as I run the fans at 100% at all times.  Noise is not a concern for me since I wear headphones when I game.   I've been fighting random locks and crashes and can only narrow it down to being an issue with Triple SLI and not bad hardware.   I can run any of the TitanX's in double SLI or single card without any issues.  
 
In Triple SLI, there are some very odd things that happen.   For instance, when running MSI Kombustor, the app can only spin up one of 3 cards.
 
h t t p://i.imgur.com/Sq039yv.png
h t t p://i.imgur.com/2dgGXmn.png
 
With double SLI, the same benchmarks max out both GPU's as expected.
 
In 3dmark, performance on FireStrike seems low compared to my old setup, but FireStrike Extreme seems to scale acceptably.
 
FireStrike GTX 780Ti Vs Titan X:  h t t p://www.3dmark.com/compare/fs/4645116/fs/1143871
FireStrike Extreme GTX 780Ti vs Titan X:  h t t p://www.3dmark.com/compare/fs/4643893/fs/1073727
 
But most important, is the locking.  With Triple SLI Titan X, my setup crashes at random intervals, but never works for more than one hour.  GTA 5, Battlefield HardLine, FarCry 4, etc, nothing works reliably.  I am testing not overclocked with the most recent drivers from Nvidia.   I am using a EVGA TripleSLI v1 Bridge.
 
I'm out of ideas and am wanting it to be either a driver issue or perhaps needing the newer v2 SLI bridge that isn't available yet.
 
/frustrated

Different Drivers: Driver version 9.18.13.5012 9.18.13.3165 give different scores.
http://www.3dmark.com/compare/fs/4645116/fs/1143871
When I change out my GPUs I start the Overclock on the Motherboard from scratch as well.
I take it that you have the Current Bios for your Motherboard?
An SLI Bridge is just an SLI Bridge and will not make any difference with performance, all the Pro SLI Bridges provid is an LED and a nice looking or Cool looking Bridge.