Hello Pavan

It would be difficult to tell you the exact marks required as the cutoff varies every year depending on various factors. 
According to the cutoff for B.Tech admission 2018-19 (round 6) of Outside Delhi Region, rank required for OBC category candidate for Computer Engineering was 8841.

You can go through the link below and check the previous year cutoff for reference and to have an idea about the rank required

 https://engineering.careers360.com/articles/jac-delhi

Good Luck!