how do i improve data transfer speed on Vista64

i have really good performance ratings on everything except data transfer

how ho i improve it

Rampage Formula x48
Xeon 3110 3.2
8 Gb OCZ Reaper HPC 1400
raid1 WD HD 500 Gb X2
ATI Radeon HD 3870 X2

Welcome to Windrivers 1hanclap.n

What model wd drives? Sata, SataII - checked that there is no restricting jumper on the drives?

What version intel matrix driver are you using?

Also what controller is running the Western Digital drives