Unlike EP45C-DS3R, EP45-UD3L has only one PCI Express x16 2.0 slot, so it's impossible to use SLI or CrossFireX setups. It also has two PCI slots and four PCI Express x1 slots.

 
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Figure 3: Slots.

Pay attention in Figure 3 and you will see serial and parallel ports headers. These ports aren't present on the motherboard rear panel, however you can buy I/O brackets and install them in order to use these ports.