Here's my setup: Graphics cards: XFX AMD Radeon HD 6870 900M 1 GB DDR5 DUAL MINIDP HDMI DUAL DVI PCI-E Video Card (HD687AZHFC) SAPPHIRE AMD Radeon HD 6870 1GB GDDR5 PCIE Graphics Card Motherboard: MSI 990FXA-GD80 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard Crossfire never comes up to be enabled. I have tried 2 different bridges that were brand new out of the box. The first time I installed the card with bridge, both cards showed up under GPUz and under device manager. Now, only the sapphire shows up under GPUz and device manager with the bridge connected. I don't know what the problem is here... Could anyone offer some advice or insight? Thanks.