Why is PC2700 showing like PC2100?

I have a Corsair XMS DDR333 PC2700 512mb dimm thats works great in my computer on my Asus A7V333. In bios I have the 4:5 cpu to memory divider on. My current FSB is 140 a little overclock from 133. So my cpu is 280ddr and my memory should be at 350ddr with the 4:5 divider. In Sisoft Sandra, however, it says my memory speed is 280mhz which would be like if I had the 1:1 divider it also recognizes my Kt333 chipset as Kt266a. Are there any other memory benchmark programs pr memory info programs that can tell me what my memory speed is at? I need to be sure I am running at 350 ddr and not 280...