Okay you need to flash your BIOS on your cards so that 3d is preset at 500/1390 and also overclock your 2d to 400mhz clock at least.
Also using Rivatuner to adjust the level of detail.
You should be able to run 268*13 with ram at 2.5-3-3-6 giving you more system bandwidth also - and in the DFI BIOS disable the ERRATA 94 and 128 settings.
Sometimes setting the SLI Aperture to AUTO in the DFI BIOS helps.
Finally in the BIOS increase the PCI-E Speed to 115Mhz.
If you are not running the PRO version of 05, after the 3d tests finsish (when the first CPU test starts) press escape - dont panic, you will register a score without going through them (sometimes gives you more points) This works in 03 too and could also boost your scores (the trivk with 03 is to start pressing escape while the first CPU test is loading).
Make sure before you run the tests that all anitvirus, firewall and spyware tools are disabled.
Turn off system restore - make sure your swap drive (virtual memory) is on a separate drive to your OS.
In the Nvidia driver window (start, control panel, display, advanced) make sure that AA and AF is turned off. Make sure VSync is Turned off and settings are at high performance. All optimisations should be switched on.
Finally press ctrl-alt-delete set 3dM05 priority to realtime, run the tests and you should see some improvements.