Re: SLI problem
Disable SLI and run it in single card mode and then re-enable SLI and try it again. Once re-enabled make sure you let the benchmark run all the way through... It sounds weird but I've seen this "fix" the issue on more than one machine.
You may also what to check the SLI mode. If it's AFR try SFR or vice versa.
MSI Z68 G3 | 2500k | CNPS9900MAX-B | 8GB G.Skill | EVGA GTX570 2560MB |ThermalTake 850w | X-Fi Titanium | Antec 900 | Asus PA248Q | Lycosa | Death Adder | Win7 Pro 64
Asus P5QL Pro | Q9400 | H50 | 8GB G.skill | GTX260 216 | Ubuntu 11.10
17" Inspiron | i5 | 4GB DDR3 | 500GB HDD | Win7 Pro 64