techPowerUp posted a review on the ASRock Z77 Extreme9 Intel LGA 1155

ASRock's Z77 Extreme9 is equipped with a PLX PCI-Express bridge chip, which adds additional PCIe slots to the board, for a total of six x16 slots. This will be a godsend for all users who want to run CrossFire or SLI with more than two cards. ASRock has also delivered a very usable BIOS implementation to maximize overclocking potential.

  ASRock Z77 Extreme9 Intel LGA 1155 Review