How do single slot and dual slot graphic cards differ?

How do single slot and dual slot graphic cards differ? nvidia single slot gpu Single-slot Design fits in small chassis and leaves room for additional PC AORUS GeForce RTX 4060 Ti ELITE 8G GV-N406TAORUS-E-8GD KEY FEATURE Powered by nvidia nvlink bridge 2slot Additionally, while feasible, overclocking the GPU with such a tiny single-slot cooler should be approached cautiously More images, along with

nvidia nvlink bridge 2slot Nvidia announces 'the most powerful single slot GPU on the planet' but it's a workstation card so naturally costs $1,250 Nvidia RTX 4000

extreme slot AMD Radeon Pro W7600 8GB 130W Single Slot GPU Launched AMD has a new GPU for the volume professional graphics market The AMD Radeon Pro W7600 Gigabyte nVidia GeForce GT 1030 2GB PCIe Video Card 4K @ 60Hz HDMI DVI 2x Displays Single Slot Low Profile 1506 1468 MHz Gigabyte nVidia GeForce GT 1030