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Old July 13, 2012, 11:02 AM
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Default New Build. No SLI. Is My 2nd PCI-E Slot Dead?

Hey guys,

I earlier this week, I built a new system and I cannot get SLI to work, because I am not getting anything from 2nd PCI-E slot. Here are my specs, all purchased from Memory Express:

Motherboard: Asus Sabertooth Z77
CPU: Intel i7 3770k
GPU: 2x EVGA GTX 670 FTW in SLI
RAM: Corsair Vengeance 16GB (2 * 8GB)
HDD: Crucial M4 256 GB SSD
PSU: Corsair AX 750W

Things I have tried:
- Swap the 2 video cards' position. Both cards work, but only have video in PCIEX16_1
- Uninstalled old drivers and re-installation of the newest drivers with both video cards with a SLI bridge
- Uninstalled old drivers and re-installation of the newest drivers with only 1 video card, restart, add 2nd video card, restart
- Checked if video card is seated properly
- Tried 3 different BIOS versions

I have come to the conclusion that the PCIEX16_2 slot is dead because:
- Fans still spinning on both video cards, so I don't think it's a PSU problem
- Have 1 video card only in PCIEX16_1. Works
- Have 1 video card only in PCIEX16_2. No video
- Have both video cards with and without SLI bridge, Windows and NVIDIA control panel only detects the first card
- While using the onboard video and 1 video card plugged in at PCIEX16_2, BIOS shows that I do not have any PCI-E cards

This machine is only 4 days old today. Do you guys have any suggestions that I haven't tried?

I think RMA'ing motherboard is best thing to do at the moment. What do you think?

If I am RMA'ing, which is the best route?

- Exchange it at Memory Express
  • Still within 30 days exchange time frame
  • No motherboard until they ship a new one to me
  • Can take up to 1-2 weeks because I live in BC and they are in AB
- Advance RMA with Asus
  • No down time because they will ship me a new one first
I am aiming towards RMA'ing with Asus, but am I allowed to RMA it to them again if the motherboard dies in a year down the road.

I appreciate any help I can get with this, because the 2nd GTX 670 feels like a very expensive paper weight at the moment.

Thanks!
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Old July 13, 2012, 11:12 AM
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Quote:
Originally Posted by caudeceus View Post
I have come to the conclusion that the PCIEX16_2 slot is dead because:
- Fans still spinning on both video cards, so I don't think it's a PSU problem
- Have 1 video card only in PCIEX16_1. Works
- Have 1 video card only in PCIEX16_2. No video
- Have both video cards with and without SLI bridge, Windows and NVIDIA control panel only detects the first card
- While using the onboard video and 1 video card plugged in at PCIEX16_2, BIOS shows that I do not have any PCI-E cards
Thanks!

Have you tried each card in the PCIEX16_1 slot to make sure each video card is working on its own (SLI disabled)?

And then with both cards installed and connected with the sli bridge, monitor plugged into the first card , do both cards show up in the nvidia control panel? And can you enable SLI?
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Old July 13, 2012, 11:17 AM
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Hmm that does sort of sound like a freak dead second pci-e slot.

I'm not sure about the warranty, you may be best to ask Asus about this to see what they say about it (if you eat your warranty on the product for sending it in for this repair). If Asus says your warranty carries on with your new board then RMA through them, otherwise I'd go through Memory Express just incase you have any warranty issue with your replacement board down the line.
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Old July 13, 2012, 11:18 AM
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Quote:
Originally Posted by dandelioneater View Post
Have you tried each card in the PCIEX16_1 slot to make sure each video card is working on its own (SLI disabled)?

And then with both cards installed and connected with the sli bridge, monitor plugged into the first card , do both cards show up in the nvidia control panel? And can you enable SLI?
Yes each card works on its own without SLI on PCIEX16_1. None of the cards work on PCIEX16_2 by itself. I don't even get the SLI option with both cards connected with the SLI bridge.
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Old July 13, 2012, 11:23 AM
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Quote:
Originally Posted by caudeceus View Post
Yes each card works on its own without SLI on PCIEX16_1. None of the cards work on PCIEX16_2 by itself. I don't even get the SLI option with both cards connected with the SLI bridge.
Well with 2 working cards installed properly, they should both show up in the Nvidia CP. I'd say it is a freak dead pcie slot as well. Probably best to go for the rma as Arinoth suggested.
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Old July 13, 2012, 01:41 PM
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SABERTOOTH Z77 BIOS 1304
Improve system stability.
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Old July 13, 2012, 05:21 PM
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I would do the advanced RMA today. Get the new one on the way over to you.
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Old July 13, 2012, 08:58 PM
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Quote:
Originally Posted by KaptCrunch View Post
SABERTOOTH Z77 BIOS 1304
Improve system stability.
Thanks! Installed it, but no go.

Quote:
Originally Posted by supeg View Post
I would do the advanced RMA today. Get the new one on the way over to you.
Yeah. Gonna have to do this.
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