This final project discusses about how to create a cluster computer by using MPICH2 then be analyzed the speed ratio between the computing performance computer cluster and non cluster. The purpose of writing of this project is to create five PCs which are connected into network and will form a cluster computer by using MPICH2. Later, the performance of computing MPICH2 in cluster computer will be analyzed. The phase on creating this cluster computer will be started with designed topology which is used, doing the installation and configuration of MPICH2 to the five PCs, then will perform computational testing by performing matrix multiplication as well as collecting data from its comparison. These computers accelerate computing performance and shorten the time of wide scale of calculation. Key words :cluster, MPICH2, matrix