I have just built a new workstation with dual E5-2630v2's on a Supermicro X9DAE motherboard, using 8 x 8Gb Unbufferred ECC RAM, and this is compatible with MB.
I attempted to install dual Nvidia GTX760's - but got no video, and no error codes. No video on POST.
I tried a single GTX 760, no video at all.
I changed to an old NVIDIA Quadro graphics card, and all works well.
When I try one GTX and the Quadro - no video at all including the Quadro
I tried an older GTX 570 by itself, same problem.
All I could think of is some bios problem, but am running the latest bios. The Bios is very flexible and I can reduce PCIe link speed to Gen1 (570 is Gen 2, 760 is Gen3) and set IOU to x4x4x4x4, x4x4x8, x8x4x4, x8x8, and x16 ( I assumed x8x8 was best way forward for dual GTX 760's). I am yet to fins a working combination.
The other common point of failure is PCIE power supply (570 and 760 need 2 x PCIE power supply Quadro doesn't), new Corsair 1050 should have plenty of power, and voltages read OK on voltmeter.
Any clues on this one? Any replies gratefully received. In the meantime I have the machine working fine, just limited to two screens and sloooow video with single Quadro card.
If you think its the BIOS even if its working well, then I think you should flash your BIOS. Or what you could do is get the specific drivers for those cards, install them, then install your 760's. Have you also tried installing the cards into another computer? If you can that is.. Have you tried both cards individually?
You could try reposting this onto the gpu forum for further support.
Thanks TP, The GTX cards work fine on another motherboard. I have tried the three GTX cards individually, with the same result. I don't understand why it fails on new Nvidia GTX gpu's but works fine on old GPU. If all else fails I can do a gpu swap with a workstation in the office that has two Quadro 2000's.
Haven't posted on GPU forum, but that's a good idea.
Still hoping Supermicro support will provide clues.
Hmm If you start up into BIOS you could try to find an option to where the video output is going, if you need help getting there consult the mobo BIOS instruction book. In there you should be able to to change it to PCIe, this would mean it definitely is going to the PCIe slots into the gpu's. If that doesn't work then hopefully someone on the GPU forum can help further.
Close this one!!!
I had a realisation, the other common point of failure was the 30" Samsung display.
Turns out when I used this screen the GTX GPU's produce a graphic refresh rate too high for the Samsung.
Putting the graphic output to a 24" Dell 1920x1200 or Asus 1440i display has no problems!
I have seen this before but the Windows and Linux graphics drivers usually handle this. The problem was that I hadn't loaded the graphics drivers and default display was too fast.