I2C CRIO II Configuration

My team and I are looking into some I2C sensors and found that we are unsure of what speed the I2C bus is using when running the WPI robot framework. From my research looks the the FPGA will do either 100kbps or 400kbps, maybe it will do more but I stopped going that direction since the configuration is determined by the WPI framework or the NI includes. So the question is:

What is the speed of the I2C bus on the CRIO II when running the most recent image?

Thank you in advanced,

~Zach