3080 not showing up on a 4x full sized pcie slot.

[Hill160881]

I have an issue. My motherboard, gigabyte b550 vision d has a full sized 16x pcie slot for its third gpu but it only has 4x pins. My 3080 won’t initialize and show up in windows. 

I have read that nvidia disabled 4x operation but I have a 3080 running on my asrock desk mini on a m.2 riser at pcie gen 3 by 4 pcie lanes and it runs about 5-6 percent slower than a 3080 in a full 16x slot. So I know it has plenty of  bandwidth and I also know it will run on a powered m.2 riser on only 4pcie lanes. However I can’t get it to show up in the third 16x slot on my gigabyte motherboard which is tripple Quadra certified? It is a full sized 16x slot with only 4x pins. 
 

Any help with a workaround would be great. I am going to be really pissed if I have to switch out to a different board because nvidia won’t allow me to use my hardware the way I want. 
 

 Thanks for any help!!!
 

 

[comicsansms]

Have you installed a PCIe SSD? That might be using the lanes allocated to that slot

[Hill160881]

8 minutes ago, comicsansms said:

Have you installed a PCIe SSD? That might be using the lanes allocated to that slot

I thought the m.2 position 1 had a direect connect to the cpu? I really have no idea how this vision d motherboard does all this. 

Won’t  it will just restrict it to sata speeds and not shut off the pcie  slot?

[WhitetailAni]

PCIe lane allocation is weird, and installing that NVMe SSD most likely disabled the x4 slot.

Also, NVMe M.2 SSDs can't run over SATA 99% of the time.

 

Is your OS on that NVMe SSD? If not, try removing it.

[Hill160881]

It is but I was considering installing the is on a standard sata ssd and seeing if that works. 
 

However, apparently nvidia no longer allows gtx/rtx cards to initialize on a 4x slot so I will need a riser card and vertical mount or a different board even though the board I have is a triple gpu board.

[tikker]

What do you consider "position 1" for the SSD? From the boards manual the one labeled M2B_SB disables the PCIe 4x slot if used.

 

but also, like you said, I believe Nvidia indeed blocked 4x usage and requires 8x minimum.

 

[Hill160881]

22 minutes ago, tikker said:

What do you consider "position 1" for the SSD? From the boards manual the one labeled M2B_SB disables the PCIe 4x slot if used.

 

but also, like you said, I believe Nvidia indeed blocked 4x usage and requires 8x minimum.

 

It’s in slot m2a-cpu. 
 

if I could figure out what pins on the card need what power to make it think it’s plugged into an 8x slot I would do that. Otherwise it’s looking like I will need a riser card or a new board.  I love how this board looks. So clean and no rgb. I don’t want a riser card

[Hill160881]

Reinstalled the drivers and it showed up. No idea what the but it is working