According to JEE Advanced 2017 cut off ranks for various categories to get through CSE in IIT Delhi are as following -
1- General
opening rank - 3
closing rank - 104
2- OBC
opening rank - 21
closing rank - 67
3- SC
opening rank - 17
closing rank - 35
4- ST
opening rank -5
closing rank -25.
So, for this year also cutoff ranks for getting into CSE in IIT Delhi will also be somewhat around these ranks.
Thanks for reading.