Can't get two nvidia cards working on motherboard

I have a Crossfire board, but i am not trying to SLI...

the board is, asus m489gtd pro usb3

i just want to use two nvidia cards for F@H

i have a 9800 GT, and GTX 460

both are working independently..

when both plugged in, only the bottom card is recognized

..both PCIe slots work, but the top drops to x8

1) 890GX only supports 2 8X lanes

2) There is a BIOS update that supposedly fixes the issue of 2 nvidia cards not being detected.

Quote:

---

Originally Posted by Panther_Seraphi

1) 890GX only supports 2 8X lanes

2) There is a BIOS update that supposedly fixes the issue of 2 nvidia cards not being detected.

---

could you be more specific on that bios update? i'm using the official 1606

Version 1606


Description M4A89GTD PRO/USB3 BIOS 1606
Fix the issue that system may be unable to detect the VGA card in PCIEX16_1 slot When using two NVIDIA VGA cards.

(i am using this bios)

Did you try swapping the card order?

Quote:

---

Originally Posted by BeepBeep2

Did you try swapping the card order?

---

and put the 460 on bottom with the display cable

alternately, have you tried using a dummy plug?

Quote:

---

Originally Posted by BeepBeep2

Did you try swapping the card order?

---

yes

Quote:

---

Originally Posted by skier

and put the 460 on bottom with the display cable

alternately, have you tried using a dummy plug?

---

yes, and what's a dummy plug?

i tried using the display cable on the video card on the top, instead of the bottom... but that doesnt work

(only on the bottom does it work)

Same here... Apparently there is some compatibility issue with different NVIDIA BIOS versions that ASUS is still trying to solve. I don't have identical cards to try with, but I have a pool of CUDA cards to choose from and no combination works : GTX 460, GTS 250, GT 240, GT 8600... always detecting a single GPU.

Quote:

---

Originally Posted by oxydius

Same here... Apparently there is some compatibility issue with different NVIDIA BIOS versions that ASUS is still trying to solve. I don't have identical cards to try with, but I have a pool of CUDA cards to choose from and no combination works : GTX 460, GTS 250, GT 240, GT 8600... always detecting a single GPU.

---

thanks for the confirmation!

are there any issues if say a 5770 in the top x16 and a lsi 92604i raid card in the bottom one? I am able to bench with the card but cant confirm what speed the 9260 is running at. since cpuz shows x8/x8 out of x16 then I am assuming its cool.

Are you using one monitor on each gpu ? Did you clear the CMOS ?