Z77x-UD5H and discrete NVIDIA Gpu not detected in slot #1 and #2

[myksto]

Hi everybody.
My new motherboard does not detect any NVidia Gpu I tried to install whereas there's no problem with Ati's. I tried to insert NVidia and Ati GPU in pci-e and both work on slot pcie #3 (x4) but only ATI Gpu works in slot #1 and #2 (16x and 8x) . Slots #1 and #2 are controlled by the CPU whereas slot #3 is controlled by chipset (Z77), aren't they? Could it be the problem, a compatibility problem? The gpu model I tried are: MSI GTS250, Asus GT520 512Mb, Asus GT510 1gb. I made several CMOS reset, tried different PSU, check all connections, cables, etc. but no Nvidia card has been detected. I also tried beta bios version 15d but didn't help. Maybe I should change some bios parameters but really wouldn't know what. Hope you can help me solve my issue soon or can help me some way. I also opened a ticket in Gigabyte support but I no answer yet. Best regards.

[wazza300]

its probably a bios issue,your best to email gigabyte and tell them about it so they can test ect,or post in the beta bios section of this forum

[myksto]

Thank for your reply.
I too think it's a bios issue or better, I hope it is.
I already wrote to Gigabyte and I'm waiting for an answer.
You think that all those MB have that kind of issue or is it a problem related to my MB only?

I guessed there would be some setting in bios setup to make my board to detect Nvidia gpu's...

Cheers.

[myksto]

Naaaaaaaaaaaaaaaaaa.
Gigabyte tells me to check all connections, check cables, check PSU and tells me it might also be a short circuit!!!
Of course I made all checks before writing to Gigabyte.
They don't even mention it could be a bios problem and now I don't know what to do.

Could be an incompatibility between the nvida cards I tried (all pcie 2.0 on the other and) and the CPU or the HD4000?

Plese advise me.

Thanks a lot.

[profJim]

Which Nvidia driver version is installed?
Go to Drivers | GeForce and see if the Auto Detect method helps.
If auto detection doesn't work, manually select the o/s version and card model.
Be sure to uninstall all ATI and Nvidia gpu software before installing new versions.
After removing the drivers, I use Driver Sweeper in windows safe mode to ensure that all video driver "leftovers" are removed.

[myksto]

Thanks for reply.
Unfortunately and as I tried to explain, my problem is not at drivers level. My Nvidia cards are not detected/recognized at bios/motherboard/hardware level if they're are installed in pcie slot 1 and 2. Everything's fine if card is being installed in slot 3 (4x slot with very few room for my card). On the other hand each Ati card I tested is detected and works perfectly in slot 1, 2 and 3.
I asked Gigabyte whether it could be a bios problem but they didn't answer me yet.
I would like to try whether a Pcie 3.0 Nvidia card would be properly detected but unfortunately I should buy one with the risk of having 2 Nvidia cards not working with my MB.

I tried to read over lots of forums for some incompatibility issues with my cards. I found many but no clear solution has been posted yet.

Any other suggestion will be appreciated.

Thanks a lot.

[mm67]

I actually have same problem with an Ati HD 7950 card, system simply doesn't see it at all. Dual HD 6870's that I am using now work just fine with Z77X-UD5H and HD 7950 card works fine with Z68XP-UD4 system.

[myksto]

It looks like an incompatibility issue but between what? The MB and the cards or between the cpu and the cards? I wrote to Gigabyte and they made tests with the same Nvidia cards I own and in their system they are detected. Unfortunately they used a Sandy Bridge CPU (i5-2500k) and not an Ivy Bridge CPU like the one I own (i7-3770k). I know that Ivy Bridge CPU directly controls pcie slot and lines whereas in a Sandy Bridge environment it's the chipset who controls pcie (it is true, isn't it???).
I asked them to possibly test an Ivy Bridge Cpu and whether it could be a compatibility problem that could be solved with a bios upgrade.
I'll be waiting for an answer.

I should test with other cards but I cannot efford to buy several Nvidia cards just to see whether they work or not.

I hope someone could post their experiences.

[wazza300]

it should see the cards,i dont have any issue with my z77/7850,are you trying the latest beta bios's?and are you disabling onboard graphics?

[myksto]

Yes guy,I tried with F15d beta bios (the latest), I've tried everything. I also have no problem with a Ati 5870 but I need to use a Nvidia card (for cuda) and I have found no Nvidia card being detected so far. Can you try with a Nvidia card to see if it works?

Thanks, bye.