Congratulations my dear ,it is a very good rank in ipu cet.you will get very good colleges in ipu with this rank of 637.after 3RD round you may get MAIT ,MSIT,BVPCOE,BPIT.but I think in MAIT ,MSIT ,BVPCOE you will get EEE and Ece and other lower branches but not CSE and IT.but choose your branch according to your interest not randomly.otherwise you will be in trouble later on.