Whether you're an NVIDIAn calling it SLI or a Radeonite referring to it as CrossFireX, a multi-card graphics setup is nowadays almost a prerequisite for experiencing the best that PC gaming has to offer. It'd be negligent of us, therefore, not to point you in the direction of the Tech Report crew's latest breakdown, which takes an investigative peek at dual-card performance on NVIDIA's latest and greatest GeForce GTX 580 and naturally compares it to a wide range of other alternatives on the market. AMD's latest refresh, the Radeon HD 6870, is among those options, though it's worth remembering that the company's real high-end gear isn't due for another couple of weeks. All the same, most people will be buying their holiday rigs right around now, and if you want an exhaustive guide as to what's what on the graphics front, the source link is your best, um... source.