Second Graphics Card Not Working

Mewdude

Honorable
Jul 7, 2013
2
0
10,510
Hello All,

I recently bought a MSI ATI Radeon HD 5830 (R5830 TWIN FROZR II) to crossfire with my XFX Radeon HD 5830 Graphics card. I installed both cards, used a single, brand new crossfire bridge to connect them, but my Device Manager is only showing one ATI Radeon HD 5800 Series display adapter (the XFX one).

Additionally, the Catalyst Control Center does not show anything about Crossfire, even in the Performance Tab.

GPU-Z shows Crossfire disabled, and only shows one Card in the dropdown menu on the bottom left.

My Setup:
Motherboard: Asus P6X58D Premium
CPU: Intel i7 930
RAM: 6 GB OCZ PC3-10666 Platinum RAM, 1333MHz, DDR3, Low Voltage, Dual Channel
Power Supply: Corsair TX750W
HDD: 2x Western Digital Caviar Black 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
Graphics Cards:
- XFX Radeon HD 5830 (in PCIe slot closest to middle of mobo)
- MSI ATI Radeon HD 5830 (R5830 TWIN FROZR II) (in middle PCIe slot)

What I've Tried:

-I have run both cards in the first PCIe slot, individually. They both work fine.
-I have hooked up both cards as described above, and disconnected power from one card at a time. Both cards work individually in their respective slots.
-I have downloaded all the latest drivers from the AMD website, including the newest version of the CCC.
-I have deleted all the ATI / Radeon folders in my computer, uninstalled the graphics driver, uninstalled the CCC, and reinstalled it all over again and it fixes nothing.
- I have gone into my BIOS Setup-> Advanced Section -> Northbridge Chipset Configuration -> PCI Express Selector, and changed the setting from Auto to x16 x1 and the problem was not fixed.
- I have begged, pleaded, raged, and shouted at my computer, to no avail.
- I have eaten an entire bag of Cheetos in the process. Not relevant but everybody needs a laugh.

Any help would be greatly appreciated.
 
- I have gone into my BIOS Setup-> Advanced Section -> Northbridge Chipset Configuration -> PCI Express Selector, and changed the setting from Auto to x16 x1 and the problem was not fixed.

That setting implies 1 card at x16 ... don't you want one of the options listed for your board as listed below ?

3 x PCIe 2.0 x16 (at x16/x8/x8 or x16/x16/x1 mode)

You don't perhaps have the card in the white slot ? haven't read the manual but my guess is that's x1 .... you'll want at least x8 x8
 

Mewdude

Honorable
Jul 7, 2013
2
0
10,510


The original setting was Auto, and that wasn't working so I tried x16 x1, but I will try x8 x8 and see what happens. I have both cards in the blue PCIe slots, as they are both too big to fit in the white PCIe slot because of my power supply.

UPDATE:
I applied the x8 x8 settings in the BIOS, and when I logged in I saw windows install a PCI to PCI driver, but I'm still only showing one graphics card in my Device Manager, Crossfire disabled in GPU-Z, and no crossfire options in CCC.