IPT is an OKAY subject. Pretty boring and outdated but since you want to do computers at uni then it might be helpful because it could get you some bonus ATAR points. Take this as an example at UTS.
http://datasearch2.uts.edu.au/undergraduate/school/leavers/atar/bonus/calculator/course.cfm#results
oh yeah i see. :)
Does ranks matter that much in your ATAR? What if i get average ranks for engineering, english and physics and get top 10 in IPT and math. While getting band 5 and 6 for all subjects except english band 4. Would I be able to achieve a 80+ with that ? :S