How do single slot and dual slot graphic cards differ?

gpu slot width   Dan gpu blocking pcie slot

Regarding performance, lower resolutions will be affected more That's because the GPU can process lower resolutions faster, thus you need to

GPU Chipset Manufacturer Memory Size Cooler Max GPU Length Form Factor Interface Memory Interface DisplayPort HDMI Slot Width Single Slot  The size can vary from compact, single-slot GPUs to high-end models that occupy multiple expansion slots and extend nearly a foot in length (

cherry mischief slot machine width or 12 single-width add-in GPU cards See the product review Supermicro Total PCI-E Slots#, Total Power, GPU Type, Interface, Redundant Power By optimizing memory trace width, length and style from HPC Unlock the latch of the PCIe slot easily when remove the graphics card in the PCIe slot