X1, x4, x8, x16, and x32. The pci express standard is one of the staples of modern computing, with a slot on more or less every desktop computer made in the last decade. IOCREST PCIe to 8 internal Ports SATA 6g With SFF8087 Card Pcie 3.0 is an advanced version with numerous benefits over 2.0. What does a pci express 2.0 slot look like . It is tricky to know the device specifications for a specific part. Pci express is a serial connection that operates more like a network than a bus. Pci express slot is one among them. Unless you're using a high end wireless card that needs a more modern version of the pci express ports you should be fine. Pcie 3.0 runs at almost double the speed of 2.0. But a practical tip is to look inside the slot to see how many contacts it has. New pcie 2.0 graphics cards are compatible with pcie 1.1 motherboards, meaning that they will run on them using the. But most people wouldn’t have. Such as a sound card or a network card, see the pi...