Am I expecting too much? 4x512@240HTT 2.5,3,3,7 is all shes got

So I have a AN8 Ultra with a 3700 Sandy and 4 512 sticks of Patriot XBLK. It will do 240 at 2.5,3,3,7 or 220 at 2,2,2,5. I get better bandwidth at the 240 setting though. Basically I am matching the bandwidth of a stock A64 3500 in everest tests. These are all at 2T BTW. Also I lose about 250MBs/sec with bank interleave on. Do the "benefits" of interleave make that bandwidth loss worth it?

ps HTT is x4 and memory is at 2.75V(memtest errors elsewise)

It's recommended that for some Diego core you can disable interleaving. It's really up to you which way you decide to set it up. As long as it's faster and stable, thats the way to go.