sir my rank in upsee is 6468 in general and girl rank is 958 which colleges are the best to do btech in cse which I can get

Based on your you can get some government Colleges also . You have good chance to get a good private College as well . The Colleges where you can apply are:

.1 Chhatrapati Shahu Ji Maharaj University Kanpur

2. Lucknow University

3. Rajkiya Engineering College Kannauj

4. Bundelkhand University

5. Rajkiya Engineering College Sohnbhadra

These are the government Colleges where you may get chance in CSE branch. As CSE branch is a demanding branch you must have good rank for this. These are the government Colleges where you can apply. It also depends on the cutoff list. The cutoff list depends on the number of students appeared in the exam and the level of paper whether it is easy, moderate or difficult. So go through it also.

If you are interested in private Colleges then you can get chance to get a good private College:

1. KIET Ghaziabad

2. JSS Noida

3.  ABES Ghaziabad

4. Ajay Kumar Garg Ghaziabad

5. Galgotia Engineering College Greater Noida

6. GL. Bajaj

These are the top most Colleges of UPTU .  You can get CSE branch in may of these College. These Colleges are too much good in terms of placement, faculty and academics. These are located in NOIDA or GHAZIABAD. As your choice is CSE you haveh  great opportunities to get a private job. You can come to know about different Colleges by visiting their respective website. You can even predict your college according to your rank by using different College predictor.  You will get extra advantage due to in girl quota. Do your counselling properly. Give your preference the different rounds of Counselling.