I recently bought a Dell AIO 5490 off Facebook and did a factory reset to start fresh. However, it's running really slow even after I added another 16GB of RAM (now 24GB total). I've made sure that all software and firmware are updated and I'm running Windows 11 Home.
Each time I boot up, I get a power warning saying, "AC power adapter wattage and type cannot be determined. The system will adjust performance to match the power available." Additionally, I found that the DC input has some damage (specifically, the inside pin).
As for the CPU performance, even when nothing is running, it won't go above 0.41GHz, despite my Dell i5-10210U being capable of up to 2.60GHz. Could this all be linked to the damaged DC input?
2 Answers
I think the damaged inside pin of your DC input could very well be the culprit. If there’s visible damage and a piece of plastic came out, it might be causing intermittent power delivery, which can throttle your CPU. Before spending money to fix it, make sure you see a noticeable improvement once the input is repaired. It’s possible that it could be affecting the speed.
It sounds like your issues could definitely be related. I've seen a similar situation with a buddy who had a broken PSU that caused his CPU to throttle down. The i5 shouldn't be running at 0.41GHz when idle. If you're able to, try using a different power supply to see if that fixes the problem. If it's an AIO, swapping the PSU might be tricky, but check if you have an external power brick — that could also be causing issues if it's not the right voltage. It might be worth replacing it to see if performance improves.
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