ATI's CrossFire multi-GPU technology started off on the Intel platform with ATI's own brand of chipset before AMD acquired the company. AMD/ATI then allowed CrossFire and the succeeding CrossFireX standards to be supported by Intel chipsets. The only current chipset platform that doesn't support CrossFire is the NVIDIA nForce series, which as ASRock demonstrated during the ongoing CeBIT event, breaks the dogma.
ASRock devised a BIOS for its nForce 740i based N7AD-SLI motherboard that enables support for CrossFire. AMD's Catalyst drivers were able to detect the motherboard as a qualified platform and enable CrossFire between two installed ATI Radeon accelerators. The setup was able to show performance increments during a 3DMark06 session. ASRock is reportedly working out similar BIOS firmware for several other motherboards made by it, and wants to enable CrossFire, CrossFireX for all its nForce motherboards.