I have 2 Radeon HD 5770 1GB eh. In my PCIe 2 & 4 slots: working in Crossfire Mode; But when I plug in my Sound Blaster Recon3D PCIe into an available PCIe x1 lane which has a 32 bit interface slot (the same as PCIe2 (my 1st video card), It disables my 2nd card in crossfire mode. So I changed my SB to the PCIe 3 x1 slot but find that my PCIe 4 will run in x2 mode, disabling my 2nd card in crossfire mode. So I need to know how do I use my SB card and have crossfire also? Does anybody have this kind of knowledge?