As Information Technology is the modern trend in banking today, it's very imperative for banks to access its impact operational performance so as to justify if the huge capital invested on it is justifiable or not, analyze their problem and proffer possible solutions. The Objective of this study is to examine how the adoption of Information Technology affects the 'operations of commercial banks in terms of effectiveness, efficiency, competitiveness, customer base and globalization of the bank. The main research instruments used are questionnaire and personal interview for staffs and customers of the bank. The simple frequency percentage was adopted as the statistical measure and hypothesis testing was analyzed using chi-square. In conclusion, the study revealed that Information Technology has tremendously improved growth and performance of the Nigerian Commercial banks. Information Technology has led to increase customer satisfaction, improved operational efficiency, reduced transaction time gives the bank a competitive edge, reduced the running cost and ushered in swift response in service delivery. The, research recommended that Government should improve the electricity supply in the country, they should support and loan money to local IT rums to foster importation, lower tariff on importation of Information technology related equipment and their agencies and regulatory bodies should, upgrade their equipment as well. The private sectors should invest into improving electricity and the banks should continuously implement customer centered IT products and services of international standard.