Slow reading

I have done a couple of graphs in Nero Speed and they are only topping out at 5.99x

Is there any way to increase this

I am using a Pioneer 106 fw 1.07 and an MSI d16 MS8216 fw 1.50

The MSI’s graph was awful up and down like a yoyo

The pioneer was better but not as fast as id like

I also have a Pioneer 121 paired with a NEC 3500AG fw 2.18 the graphs were a bit jittery no too bad is there any way to cut down on this would new ide leads help?