Hi guys I wonder if you can help, I have two EVGA 2080ti XC Ultra in SLI
 
The top GPU according to the bios is PCIe x8 @ 1.0 x8
Second GPU according to the bios is PCIe x8 @ 3.0 x8
 
For some strange reason my top GPU is limited to 1.0 x8, yet the second GPU is 3.0 x8????
 
This is having an impact on the performance of the card, which all my displays are connected to, as I cannot overclock this card without getting a windows blue screen.
 
PC Specs are;
 
i9 9900k @ 5.0Ghz
Z390 Aorus Xtreme waterforce board (Bios F7b)
32GB 3200 Corsair Vengence Pro RGB 
500GB Samsung 970 Evo NVMe 3.0 x4
2TB Seagate FireCuda 510 NVMe 3.0 x4
 
All drivers are up to date (GeForce Driver 445.87)
 
 
Here are some screen shots of what Precision X1 is showing
 
VGA 1

 

 

 
 
 
 
 
VGA 2
 

 

 
Dont have enough kB to upload the screen shot of GPU clock speed when boost lock is enabled but it is 2175 MHz @ 31c
 
 
what could be causing this? Issue with the VGA or the motherboard?
 
 

Thanks, you are right, it does go to 3.0 x8 when under load.

But I still dont get why the top card is not overclocking like the bottom. I'm starting to think there is an issue with it.

If you look at the screen dumps of the VF curve, the top VGA is different to the bottom VGA, when I press scan on VGA 1 it just gets stuck at 1350mhz and doesn't move, VGA 2 starts to scan properly and goes all the way up to 2200+ mhz.


It's all built with hardline tubing so I'm gonna have to drain and remove to swap the GPUs around and see if it still behaves the same way.