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SLI stoppped working

SPG

SPG

SPG

Soldato
Joined
28 Jul 2010
Posts
10,500
Having problems :(

System spec

MSI-GD65 B3, 8meg ram, SSD and 1tb raid, 2 x GTX 580 all watercooled and temps show thats working fine, flow etc. Cougar GX 1050 PSU

Right then

All of a sudden SLI has stopped working, at first i though it was GPU that had died so i removed the bridge and power to each card and both work fine on there own. I have removed NVIDEA drivers a couple of times and used the clean install and all is well there.

Now if if put back in the bridge and connect the HDMI cable in the original GPU nothing happens. System appears to boot but blank scree. If i reboot and put the HDMI lead in the second card all is well, but the enable SLI mode is not available in the nvidea control panel.

Any ideas, its driving me mad ?
 
Think i have found the issue

Latest realtek driver for my board. Brings back the SLI option anyway.
 
Damm it

Problem is back so it wasnt the ethernet driver.

Both cards will post on there own but connect the SLI bridge and nothing any ideas ?
 
Meh :)

Tried that nothing on GPU 1, however if i reboot and plug in GPU 2 to the monitor i can into windows at least, however it doesn't recognise the cards and runs at stock settings.

Surely it cant be a windows thing as it wont even post in if all is connected to GPU 1 wit h the bridge. I have unplugged everything else apart from the OS drive as well. No idea if its the GPU, or M/B at this stage.
 
Good idea,

Like all these it get plugged in never moves, so how can it break, bloody maddening :)
 
Being a mechanical engineer i totally agree with you. But electrical stuff black magic. Trust nothing you cant see :)
 
Dodgy overclock, Temperamental psu, or as said dodgy bridge connection are my only thoughts.

/edit just seen that is a pretty beefy psu so maybe not that.
 
HI Surveyor

Thanks for the offer, i will hold back on the offer as there is yet another twist in the tale :(

Both cars are working fine alone. Connect the bridge with GPU 1 with the HDMI and nothing, connect the bridge with GPU 2 with the HDMI its posts and gets into windows. I than have to re-install the drivers (every time i reboot) depending on how it feels it either allows me to select physx or enable SLI and it works.

So its either

A faulty M/B
A faulty PSU
A faulty 580

As for power needs there is SLI 580`s, 2SSD drives, 2 HD, Water pump, Fan controller and a total of 11 fans on a 1050 PSU, The reason i dont really think its the PSU is SLI gets going after 1 or 2 attemps at reinstalling drivers.
 
SPG said:
HI Surveyor

Thanks for the offer, i will hold back on the offer as there is yet another twist in the tale :(

Both cars are working fine alone. Connect the bridge with GPU 1 with the HDMI and nothing, connect the bridge with GPU 2 with the HDMI its posts and gets into windows. I than have to re-install the drivers (every time i reboot) depending on how it feels it either allows me to select physx or enable SLI and it works.

So its either

A faulty M/B
A faulty PSU
A faulty 580

As for power needs there is SLI 580`s, 2SSD drives, 2 HD, Water pump, Fan controller and a total of 11 fans on a 1050 PSU, The reason i dont really think its the PSU is SLI gets going after 1 or 2 attemps at reinstalling drivers.
Click to expand...

I would probably be reinstalling windows at this point in your shoes. But I do like a fresh install.
 
Well so far so good.

Its seems a windows install has cured the problem, running the main screen of GPU2 now though as i forgot to switch the HDMI lead back :)
 
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