Old tower server or mini PC: the real cost of saving power
A 24/7 in Bali, Indonesia costs about $4 to $6 per month in electricity when it runs on an older used tower PC. The current machine has an Intel Core i3-4160, 16GB of , a 500GB hard drive, a 400W , and a Gigabyte H81M-DS2 . Moving to a small machine such as a Lenovo M710q with a Core i3-7100T could lower the monthly power cost to about $1 because its idle power is much lower.
The hard part is that used custom tower PCs are very difficult to sell locally, so the old machine may just sit unused. It also does not make sense as a daily desktop because a laptop already fills that role. With only a 500GB hard drive, the tower would likely feel very slow for normal desktop use because storage would become the bottleneck.
The power savings alone may not make the new mini PC purchase worth it if the old tower cannot be sold or reused.
Key points
- The old i3 tower costs about $4 to $6 per month to run all day.
- A mini PC could cut the monthly power cost to about $1.
- The old tower is hard to sell locally, which weakens the upgrade case.
- A hard drive-only setup can feel slow because storage becomes the bottleneck.
- Power savings should be compared with purchase cost and reuse value.