Hi everyone, I am thinking of building up a new system to satisfy my need in scientific computing. My program usually involves with for-loop iterations written in Intel Visual Fortran 2013 on Microsoft Visual Studio 2010. Some of my work need to perform numerical methods, like Amoeba algorithm to look for optimal model parameters, which usually costs me days , sometimes even a week to fulfill the task on my current desktop with AMD Athlon 64 X2 Duo core 5800. I am now having several questions to be answered before I finalize my shopping list. Please give me your suggestions on the following issues: 1) I tend to pick AMD Fx-8120 black edition for its convenience in overclock. Today's price of this cpu is around $160. Do I miss any other cpu comparable in price that could beat this AMD one in terms of performance? 2) Given a budget constraint to build up a system with new cpu, power supply, mother board, mid tower case, and necessary RAM around $300 (the cost could go up a little bite to the $400 if necessary), do you think for the purpose of pure computing, I need to throw a water cooler into the system? By the way, in case of overclock, what's the minimum watt of the power supply do I need to choose? 3) Is it ok to choose a basic video card like ZOTAC ZT-60602-10L Synergy Edition GeForce GT 610, if the major task of the new system focuses on computing only? Thanks for your time reading through my post. Looking forward to seeing your reply. Thanks.