Maximus VIII Extreme incompatibility with Gigabyte GTX 980ti G1

[reflex78]

I face an incompatibility issue between ASUS MAXIMUS VIII EXTREME and my new graphic card 980ti Gigabyte G1.
When I pluged it in my x8 slot (x16 slot is not available because of my big cpu fan) then it stucks at minimum speed of x4.
I have tried 2 other cards (Asus 780ti and Palit gt440) wich run perfectly fine on the same slot at speed x8 as expected.
I'm almost sure it's a bug with Asus motherboards and some cards...
(I have the last bios version 1701)

[Minsekt]

you can select gen3 for pcie in bios. then it should run at max

[reflex78]

Minsekt wrote:
you can select gen3 for pcie in bios. then it should run at max

Thanks, it was the first thing I tried, but didn't help.
It's not a problem of generation (gen 1, 2 or 3) but speed detection with some cards (x4, x8, or x16).
I've searched everywhere in the BIOS but didn't found any parameter to force speed value...

[brkkab123]

It could be a issue with the Nvidia driver's. They've all had bug's for a few months lately.

[reflex78]

brkkab123 wrote:
It could be a issue with the Nvidia driver's. They've all had bug's for a few months lately.

I don't think so because it happens low level, before Windows loading Nvidia drivers...

[reflex78]

I'm not alone having this incompatibility issue.
There is someone else on this forum facing the same problem with new GTX 1080: https://rog.asus.com/forum/showthread.php?85780-Maximus-VIII-Impact-incompatibility-with-Asus-GTX-10...
And an other one with GTX TITAN : https://rog.asus.com/forum/archive/index.php/t-53291.html

Pity to pay premium price and face basic speed problems...:mad:

[Nate152]

Hi reflex78

I wonder if it could be a faulty 980 Ti since you gtx 780 Ti and gt440 work perfectly fine.

Is there any way you can test the 980 Ti in another pc?

[reflex78]

Nate152 wrote:
Hi reflex78

I wonder if it could be a faulty 980 Ti since you gtx 780 Ti and gt440 work perfectly fine.

Is there any way you can test the 980 Ti in another pc?

Hi, thanks for the tip, I'll try if I find another pc.
But I doubt because the guy who sent the card said he didn't face this problem, and other people with different cards are complaining about the same incompatibility issue...

[hiong]

a handful of people experiencing a similar issue does not negate the thousands of others who do not face the same problem. your conclusion that there is a bug with all Asus motherboards is flawed. try this, take your 980 Ti out, give the PCIe contacts a good rub with an eraser or something, and try again.

[reflex78]

hiong wrote:
a handful of people experiencing a similar issue does not negate the thousands of others who do not face the same problem. your conclusion that there is a bug with all Asus motherboards is flawed. try this, take your 980 Ti out, give the PCIe contacts a good rub with an eraser or something, and try again.

The opposite is also true. And I'm not talking about a general bug but incompatibility issue with some specific cards (l'm not the only one).
By the way, I have latest bios on both motherboard and graphic card.
And my graphic card is almost new, and pin connectors perfectly clean and not damage.
I'm not newbie and build computers since 20 years, but with this issue I'm stuck without Asus help.