what rank is required to get cs branch in iit?

5000

under 2000

<500

it depends on college u are opting.

for iit bombay and delhi<200

under 1000 in old iits

below 5000

under 2000 in older iits

it depends on the college u want and that if u want 4yr BTEch Or Dual degree.

For Bombay and delhi, assume it to be below 200.

u can have a idea about it through this link...

http://jeeadv.iitb.ac.in/JEE2012/openclose2012.php

good luck