Thanks to Mackey D for pointing me in the direction of this article posted over at FurtureMarks Forum by jslattery.

For a while my tRas was set on 5, but then I changed it to 6 according to a Mushkin article on optimal timings. A lot of questions have been apparently asked about the best setting for tRas on Nforce2's regarding FSB and such. Today, I ran some benches in Sandra2004's Memory Bandwidth Benchmark to see what would work out best.