I got 51.7 percentile in jee mains and CRL 469325 can I get computer science engineering branch in sillicon or any other private or govt. colleges??

In this rank you can get privet colleges . It is huge rank ,even if you have home state quota you can also apply this for admission . And it's a just a suggestion it's better if you get admission in your own States. And also near private college.

Or you may get admission in few of the colleges:

colleges affliated to MDU

colleges affiliated to UP tecnical university

colleges affiliated to HPTU

amity university

gautam budh university, greater noida

UPES, dehradun

You also predict your college from your rank in below link

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

JEE Main Rank Predictor
https://engineering.careers360.com/jee-main-rank-predictor


Thank you. I hope this answer helps you.