In other reviews, I had seen the Asus p6t Deluxe performing better than this gigabyte mother, both in overclocking and in SLI scaling. You used only 2 PCI express in most tests (to be fair, the Asus would not had allowed to do 3x-SLI test)
Also, I would had testing with 6x 1 Gb Kingston hyperX ddr3 2000 CL9 1.65v. Why use ddr3 1600? higher memory clocks give little advantage, but in this benchmark, would have reduced system bottleneck.
maybe the 285 gives better bang for the buck in Quad setup. Is sad that it was not included.