As you want I would like to say both NIT Patna and NIT Silchar is good to do B.tech . here I am also tell me short info of both to make your decision easy :

National Institute of Technology (NIT), Silchar was established in 1967 as a Regional Engineering College in Assam.

Courses offered :
Bachelor of Technology in Civil Engineering
Bachelor of Technology in Mechanical Engineering
Bachelor of Technolgy in Electrical Engineering
Bachelor of Technology in Computer Science and Engineering
Bachelor of Technology in Electronics and Communications Engineering


Departments
Department of Computer Science & Engineering
Department of Electronics & Communication Engineering
Department of Mechanical Engineering
Department of Civil Engineering
Department of Electronics & Instrumentation Engineering
Department of Electrical Engineering
Department of Mathematics
Department of Physics
Department of Chemistry
Department of Humanities and Social Sciences
Department of Management Studies

Recruiters -

Accenture
Airvana
Capgemini
Denso
Cummins
Godrej
HCL
Honda
HP
IBM

Address
National Institute of Technology
Cachar Dist
Silchar
Assam
Country : India
Contact No : 03842-242273, 241313
Contact Email : director@nits.ac.in

National Institute of Technology (NITP), Patna was established in 2004.

Courses
Bachelor of Technology in Civil Engineering
Bachelor of Technology in Computer Science and Engineering
Bachelor of Technology in Electrical Engineering
Bachelor of Technology in Electronics and Communication Engineering
Bachelor of Technology in Information Technology

Departments
Department of Architecture
Department of Civil Engineering
Department of Computer Science & Engineering
Department of Electrical Engineering
Department of Electronics & Communication Engineering
Department of Information Technology
Department of Mechanical Engineering
Department of Chemistry
Department of Physics
Department of Mathematics
Department of Social Science & Humanities

Recruiters -
Indian Oil Corporation
Bharat Petroleum
Microsoft
Hero Motor Corp
Maruti Suzuki
Tata Motors
Verizon
SAP Labs
Kribhco
Samsung

Address
National Institute of Technology, Patna
Walmi complex
Phulwarisarif
City : Patna
State : Bihar
Country : India
Contact No : 0612 - 2371715