Recent Nforce or Windows drivers for Nvidia's SATA controllers have been performance challenged; and our testing of the N680SLI-DQ6 again exhibits the same symptoms. It looks like the drivers are only enabling SATA-1 levels of performance; and while in real life the burst rate test is not very significant, it is annoying to see such problems on high end motherboards.
IDE
The IDE performance of the N680SLI-DQ6 was quite good, only 0.2MB/sec out of top spot, with an excellent 1% CPU utilization.
USB
The less we say about the USB HDTach performance of the N680SLI-DQ6 the better - it took dead last place.
WinRAR
The N680SLI-DQ6 turned in a rather lackluster WinRAR score at stock, but managed third place overclocked speeds.