Problem with First GPU - only PCIX 3.0 @ 8x

[bernisv]

Hallo all,

I have just finished my new build this night.
Now i have the problem, that my first GPU is only running PCIX 3.0 @ 8x.
The funny thing is, that my second GPU (its the 480 GTX) is running at full 16x (its a PCIX 2.0 Card).
Im using a M2, but i - but that cannot be the reason......

Greetings
Berni

[Hopper64]

I was a little concerned about the heat generated with 2 780 Ti cards by EVGA (pushing 70C which is still in spec), so I took the 2 EVGA Titans I had in another machine and installed them this weekend in my R5E. They are both working at X16. I post this only to help with this thread. Hope it is beneficial.

[ariskar]

Hopper64 wrote:
I was a little concerned about the heat generated with 2 780 Ti cards by EVGA (pushing 70C which is still in spec), so I took the 2 EVGA Titans I had in another machine and installed them this weekend in my R5E. They are both working at X16. I post this only to help with this thread. Hope it is beneficial.

Thanks Hopper64, but I suppose this issue has mostly to do with the combination of the M2 SSD (XP941) and the graphics card.

[Hopper64]

ariskar wrote:
Thanks Hopper64, but I suppose this issue has mostly to do with the combination of the M2 SSD (XP941) and the graphics card.

Yes, but I thought it was tested with a single Titan only as well, and x8 was still the result. Mine appear to be running at x16.

[RickROG]

@ariskar

Have you contacted EVGA or Samsung to see if their support has anything for you-VGA BIOS or firmware? googling a lot of people are having major issues with XP941 on a few different motherboard brands; perhaps those that it works on have had a chance to figure it out and fix it-not in a day type thing either. 🙂

[ariskar]

RickROG wrote:
@ariskar

Have you contacted EVGA or Samsung to see if their support has anything for you-VGA BIOS or firmware? googling a lot of people are having major issues with XP941 on a few different motherboard brands; perhaps those that it works on have had a chance to figure it out and fix it-not in a day type thing either. 🙂

Thanks for your comments. XP941 has problem with older boards, it is supposed to be fully supported by X99 and Z97 boards with M2 slots.

Firstly, I am using a Palit card, so EVGA is irrelevant. XP941 is a Samsung OEM product and hence there is little to no support to get from Samsung. XP941 operates perfectly anyway.

The Palit GPU (980) syncs at x16 if the M2 drive (XP941) is removed. Hence it has to do with the PCIe allocation the motherboard does. I do not see how vBIOS has to do with PCIe allocation, as the GPU syncs in spec (x16) without the other device in.

[bernisv]

Hello,

i'm back in business with the Rampage V. As i mentioned, the normal Titan didn't work @16, only @8, no matter what i have tried.
Now i tried it with my new Titan X and it runs @16. So i think it was some sort of firmware incompatibility between the card and the UEFI of the board.

Greetings
berni

[MP7]

Hello guys,

I think it's pointless opening a new thread since I have the same problem.
Until now I was using a 780Ti with a raiser cable and not on slot 1 so it was natural it was running at x8 on one of the lower slots, but now since I've upgraded to a 1080Ti and using again a raiser but connected to the first slot I was expecting it to run at X16 but surprisingly it doesn't.

- I'm on latest BIOS (3701) and the problem was the same even on the previous version
- CPU is 5820k
- only other occupied PCIE slot is the second (just a TV capture card) as you can see from pictures below



Any suggestions?

[LiveOrDie]

Like i have said before and others have said its related to the bios installed on your titans which is the problem, i don't recommend force flashing a EVGA bios onto these cards but it will probably fix the problem.