Motherboard.org posted a review on the Asus P5N-E SLI Motherboard

ASUS has done a wonderful job with their P5N-E SLI chipset. So wonderful, in fact that in many respects the performance of the board outdoes its bigger sibling the 680i SLI. The features that the nForce 680i SLI boards bring to the table that this board does not have include: dual x16 cards, Dual Gigabit Ethernet, LinkBoost, 6 SATA ports instead of 4 and 2 additional USB ports.

Asus P5N-E SLI Motherboard Review