As one advantages of video card Radeon HD 3870 x2 at the announcement moment was the possibility to work on any motherboard , even if it does not ensure CrossFire support .
But with the reference to AMD notice , Radeon HD 3870 x2 video card can have problems with motherboard on the base of chipset Intel 915G, 925X, P965, 975X and X38, and even in motherboard on base of chipset ATI Radeon Xpress 200. Problem is manifested in the temporal absence of image at the initial load moment. Note this problem is rare, and the same motherboard can work with Radeon HD 3870 x2 absolutely normally.
AMD already solves this problem, and motherboard bios update must remove it. The corresponding bios versions will appear in motherboard producers sites.