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 MPower Z87 | 4770k | CNPS9900MAX-B | 8GB G.Skill 1866 | EVGA GTX760 |ThermalTake 850w | X-Fi Titanium | HAF | Asus PA248Q | Lycosa | Death Adder | Win8 Pro 64
MSI GD65 | 2500k | H50 | 8GB G.skill | GTX570 | Ubuntu 13.10
17" Inspiron | i5 | 4GB DDR3 | 500GB HDD | Win7 Pro 64