14 DAY TRIAL // It's one thing to say that a motherboard or PC can house two or more graphics adapters, and another to actually make a system with more than one card.
You actually need to pay for those extra cards, and maybe for a stronger PSU and/or a good water cooling system.
And since it doesn't make much sense to build CrossFireX (AMD) or SLI (NVIDIA) computers with weak cards, the price gets all the higher with every high-grade adapter you bring in.
Add to that a multi-monitor setup (because it's a waste to let that super-resolution potential languish), and you have a monster on your hands.
That's why the triple-VGA computer posted on the Extreme Windows Blog cost $17,000 / €12,800. Because it has three Sharp PN-K321 4K monitors connected to three AMD Radeon HD 7970 video cards.
1.5 billion pixels are displayed on the combined 12K resolution screen, because the monitors each have a resolution of 3840 x 2160 pixels (4K on 32 inches).
AMD had to make some custom drivers for EyeFinity. Without them, the computer could only display things in 8 FPS.