Operation Upgrade: How We Rebuilt Three Old PCs, Part By Part
UPGRADING DOs AND DON’Ts
Adherence to a few simple guidelines can make your upgrade go much more smoothly
DON’T REUSE YOUR THERMAL PASTE
If you upgrade your CPU or heatsink, you may be tempted to just plop the old heatsink back in place, but it’s generally recommended that you clean off the old thermal paste and re-apply fresh paste to the new CPU or heatsink. If the old thermal paste is gunked on like concrete, it may take more than elbow grease to clean it off. We use Arctic Silver’s ArctiClean, but a bit of 99 percent isopropyl alcohol also works in a pinch.

DON’T UNDERESTIMATE YOUR POWER NEEDS
Just upgraded from a single card to a dual-GPU card? Sure, the plugs may fit, but if your PSU is sagging under the load on a cool day, it’ll get even worse when temperatures rise. It can be tough to gauge the power requirements, so check with the GPU vendor for what your new card requires.
DON’T UNDERESTIMATE YOUR COOLING NEEDS
If you just swapped a G-series Pentium for a Core i7-2700K you should probably upgrade your heatsink fan, too, as a faster CPU usually means more heat. If you’re using the stock Intel cooler, keep in mind that the budget chip’s cooler might look the same, but it’s actually different from the higher-performing heatsinks.
DON’T THROW AWAY THOSE OLD PARTS
So you just added a second optical drive and upgraded the GPU. Just throw away that old bezel and expansion card slot cover, right? Not so fast, buddy. We recommend that you save those parts for the future when you decide to give away the case. That’s usually when you start looking for that old bezel or other parts that you thought you didn’t need anymore.
DON’T REUSE YOUR OLD WINDOWS INSTALL
We know, we know, one of the pains of doing a major upgrade is dealing with an OS reinstall. However, when your upgrade involves swapping the motherboard and chipset, it’s recommended that you do a clean install. You can get away with just letting Windows redetect the new hardware, but a clean install will protect you against any potential problems.
DO PERFORM A BACKUP
Before you do your upgrade, we recommend that you take the time to perform a full backup of your files. Why? Because this is the time when something breaks and the last person who touched it gets blamed for the breaking, even if you had nothing to do with it. So consider this your public service announcement.
DO MOVE YOUR DEFAULT LIBRARIES
If you just upgraded to an SSD, don’t forget to move your default library location from that limited-space SSD to your HDD. Do this by clicking the Start button on Windows 7 and selecting Documents. In the left-hand pane, expand the Documents entry by clicking it and then right-click My Documents. Select the Location tab and click Move to move it to your HDD.

DO TIDY UP THE INTERIOR
If you have four years’ worth of cat hair circulating in your PC, it’s time to clean it. We use a vacuum cleaner to carefully suck up the dust bunnies. Take care not to get the vacuum so close as to remove components from your motherboard and GPU. Also clean the case’s filters and vents of dust. If your wiring is a mess, now is also a perfect time to make it ship-shape.
DO MAKE THE JUMP TO AHCI
If your machine is old enough, you likely did not have AHCI, or Adaptive Host Control Interface, enabled, as many motherboards left it off by default. AHCI lets you take advantage of advanced capabilities such as support for booting to devices larger than 2.2TB, native command queuing, and hot swapping. You should only enable AHCI if you’re doing a clean install of the OS, which would be the case if you’re installing a hard drive or SSD. If you enable AHCI without doing a clean install, Windows 7 will fail to boot until you turn it off.
DO CHECK YOUR AIRFLOW
Since you’re in your box tinkering around, we recommend that you take a look at the case’s airflow. Generally, you want air flowing from the front of the case to the rear of the case where it’s exhausted. You can reposition fans and adjust fan speeds to help with this. We generally recommend running more intake fans than exhaust fans in dustier environments. This should aid positive air pressure in the case and help reduce dust issues.