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If all of this fails, either your card requires some other feature to be disabled, one of your monitors no longer works, or your card is incompatible with these steps. You do not have to uninstall the drivers, and you only need to do this if Crimson Manager complains or malfunctions. (Conditional) If you have Crimson Manager, you may have to reinstall it.This makes ABSOLUTELY sure no remnants stick in RAM and that all capacitors are discharged. CAREFULLY remove the CrossFire cable from BOTH cards.This will make sure no power is left in the system this is always a good thing to do when changing hardware. If you do not have Catalyst Control Center (or have the Crimson Manager) do the following: If you have Catalyst Control Center, go to Performance -> AMD CrossFireX and select "Disable AMD CrossFireX". If your board has an IDE power slot next to your PCI-e slots, make sure there is a power cord inserted that works.įor some reason, CrossFire disables multi-monitor features.If you have a CrossFire cable, make sure it is seated properly on both sides and does not have dust or lint inside.If there is dust or lint in the slot, this could bend your card, potentially ruining the contacts or your motherboard. Even if the card is latched firmly into place, give it gentle pressure just to make sure. Make sure your cards are firmly seated and ensure there is no dust in the bottom of the port underneath your card.
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They try to use the same memory area, and this can screw up your entire PC. On-board and expansion card graphics units CANNOT be used together. Also, if one monitor is plugged into the on-board graphics port instead of another card, try plugging it into a second card. Most cards will not, but your mileage may vary. If you have two monitors plugged into one card, check if your card supports this.
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It would be appreciated if you would report if this worked for you, and the card series you got working. This tutorial is only tested on Radeon HD 5xxx series. This is actually REALLY simple to fix but will impact your cards' performance. Since I recently had this problem and fixed it, I might as well share the solution.
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