UPGRADING A CORE SYSTEM is much like building a new rig. In this case, we started by taking a can of compressed air and attempting to blow out as much of the dust as we could. Then, we removed as many panels as possible, before doing the same again, and began to remove the cooling after that. This gives you the opportunity to grab a microfiber cloth and clean up any fans going back in, along with the areas on which they were mounted. We replaced a lot of the fans, so it was less of an issue, but if you’re reusing them, it’s not a bad idea to clean off the blades in particular, before installing them back into the chassis.