I built this PC about 2.5 years ago, and lately I've noticed that it gets noticeably warm during some games. The temperatures still seem to be within a safe range, but I'd like the system to last another 8–10 years, especially given how expensive replacement hardware is right now. I've always used whatever fans came with the case, so I'm not very familiar with fan placement, intake and exhaust configurations, or whether adding two more fans would make a meaningful difference. I'd also appreciate recommendations for a reliable UPS. The parts list is included in the original build link, although a few exact SKU details may not be perfectly matched.
3 Answers
For a UPS, look for something around 1350–1500 VA from a reputable brand. A basic line-interactive model with AVR should be fine for most desktop PCs, and simulated sine wave output is generally adequate for a normal computer power supply. Make sure the watt rating is high enough for your system and connect the PC and monitor to the battery-backed outlets.
The CyberPower CP850PFCLCD is a commonly used option, and there are larger versions if your computer and monitor need more capacity. Whichever model you choose, remember that a UPS is mainly meant to give you time to save your work and shut down safely—not to keep a gaming PC running for a long time during an outage.
Around 40°C while gaming is completely normal and isn’t something to worry about. Before buying more fans, check the actual CPU and GPU temperatures under load with a monitoring tool. If both are comfortably below their thermal limits, extra fans probably won’t improve longevity in any meaningful way. If you do add fans, a simple front or bottom intake plus rear or top exhaust setup is usually enough, with slightly more intake than exhaust to reduce dust buildup.
A game feeling warm to the touch doesn’t necessarily mean the components are overheating. The temperature readings for the CPU and GPU are what matter, not the case temperature.