AMD Crossfire (CrossFireX) 

  • is a brand name for the multi-GPU technology by Advanced Micro Devices, originally developed by ATI Technologies
  • the technology allows up to four GPUs to be used in a single computer to improve graphics performance

Scan-Line Interleave (SLI)

  • is a brand name for a multi-GPU technology developed by Nvidia for linking 2 or more video cards together to produce a single output. SLI is a parallel processing algorithm for computer graphics, meant to increase the available processing power
  • the motherboard need support of this in order to use it