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Top Colleges in Tamil Nadu offering CSE within Rs 80,000 are mentioned below;

• Government College of Technology Coimbatore: Rs 40,120
• Thiagarajar College of Engineering Madurai:  67,400
• Coimbatore Institute of Technology : Rs 95,180
• Government College of Engineering Salem: Rs 28,735
• Government College of Engineering, Tirunelveli:  Rs 31,260
• Thanthai Periyar Government Institute of Technology Vellore:  Rs 28,235
• Alagappa Chettiar College of Engineering and Technology: Rs 34,675
• Government College of Engineering Bargur: Rs 22,740
• Government College of Engineering Fathimanagar:  Rs 30,200
• Government College of Engineering, Thanjavur Thanjavur: Rs 39,440
• Government College of Engineering, Dharmapuri:  Rs 30,425
• University College of Engineering, Panruti Panruti: Rs 46,810
• Government College of Engineering, Bodinayakanur: Rs 27,885
• University College of Engineering, Pattukkottai: Rs 46,810
• Hosur Institute of Technology and Science, Hosur: Rs 75,000
• Latha Mathavan Engineering College, Madurai: Rs 60,000

check out our page at https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-india?state=Tamil%20Nadu&degree=B.E%20/B.Tech&fee=Less%20than%20100000&branch=Computer%20Science%20Engineering to know more details regarding this.