Crossfire Issues

[Eddie_III]

Hello, I need some guidance here. I just received my new 290x card and put it in the second pci-e slot. I have a xfx 290x 1000/1250 and new card is a powercolor 290x 1030/1250. After installing new card I cannot use my first cards hdmi out anymore. It just goes to a black screen. So I plugged into new card hdmi and get video. I removed and reinstalled new drivers and can boot into windows. When I go to enable crossfire in CCC its not there. I checked GPU Dimm in bios and it only shows the 2nd video card in there at x8 which I know both cards will run at x8. It doesn't even recognize my first card anymore. Am I missing something here? I get no video at all out of first card. Not even to get to bios when 2nd card is installed. Please help

[Eddie_III]

I was in a hurry forgot to mention, my motherboard is a maximus vi formula/4790k with a ax860 PSU. I have a separate 8 pin and 6 pin line running from PSU for a total of 4. I don't think power is an issue

[hax0rmort]

what slots do you have the cards in?

[Ipswicher]

Hi Eddi III Install your best card in number one PCI-E slot, and by "best card" I mean the one that has the ports to suit your monitors. As with any bridging of cards, the slowest will not help the faster card. The default "performance" is always the slowest card. Insert the first card and do updates to that. Insert the second card. As with ATI cards, the driver will install on second card as well, :-

"as long as they use the same chips."

The second card is only an add on card, and supplements the first card, via the PCI-E buss. Do not use ports on second card!