Hello Anwesh,

You really have a good score and your chances are quite high of getting a good college for M.Tech courses or PSUs. Some of the IITs along with their previous year's cutoffs are listed below:

• IIT Delhi- around 565- 650 (varies as per course)
• IIT Bombay- 510
• IIT Madras- 740- 838 (varies as per course)
• IIT Kharagpur- 746- 776 (varies as per course)
• IIT Kanpur- 690- 805 (varies as per course)
• IIT Roorkee- 54.56 (marks)
• IIT Guwahati- 411-642 (varies as per course)

Some of the PSUs are:

• DMRC- 65.17
• NBCC- 64.50
• GAIL- 59.10
• MDL- 59.58
• BHEL- 73.67
• HPCL- 58.64

These are some of the colleges and PSUs where you might be eligible. Hope this helps. 

To know more in details about your chances in PSUs and IITs check the link below:

https://engineering.careers360.com/gate-college-predictor

Good luck!