EVGA H55 comes with two x16 PCI Express 2.0 slots and three standard PCI slots. The second PCI Express x16 slot works at x4 and can also be used for installing x1 video cards. These two x16 slots support CrossFire configuration, but not SLI.
In Figure 2, you can see how this motherboard has big reset and power buttons soldered straight on the board, which certainly helps when the computer is dead and you are troubleshooting your system. A clear CMOS button is also provided.