This encompassing study of computational simulation was directed to examine the performance the efficiency of the microchannel heat sinks with 55 types of MCHS with the incorporation of circular pin fins with dimensions of diameter 15 µm, height of 60 µm and with uniform space of 50 µm. The fundamental focus of this research is to compare the microchannel heat sink performance with fins and without fins. A thorough study of the mesh for the grid independence study was performed for both with and without fins of the channel to find the accurate result of the simulation. The analysis is carried out for about four distinct Reynolds numbers ranging from 500 to 2000 all in the laminar regime. The assessment on the performance is estimated with the Nusselt number, friction factor, and the thermal performance factor. The geometry of the microchannel with almost maximum pin height, which matches the height of the channel, is an additional value to the study since the pin height is also a prominent factor for efficient heat transfer. A comprehensive analysis of the overall performance of the heat sink was accomplished by the final output of the thermal management performance of the channel. The analysis summarizes that the microchannel with pin fins of a higher velocity shows high heat transfer efficiency and effective thermal performance suitable for optimizing the microchannel and its applications.