PC Stats posted a review on the Gigabyte Energy Efficient GA-EP45-DQ6 Motherboard

Any gamer on the market for a Crossfire capable motherboard will be
pleased with Gigabyte's EP45-DQ6 motherboard and its pair of 2nd generation PCI Express x16 slots. With only one PCI Express x16 videocard installed, there are 16 PCI-e lanes dedicated to it, but under Crossfire both videocards will run in x8/x8 mode. Alongside are two PCI Express x4 slots for high bandwidth peripherals, which while physically shorter than a full size PCI express x16 slots are open at the end so full-size PCI Express x16 videocards can be installed.

Gigabyte Energy Efficient GA-EP45-DQ6 Motherboard Review