Most standard motherboards use a 24-pin power connector. The Acer H61H2-AD often uses a 12-pin power connector . If you try to plug a standard ATX PSU into this, it will not fit (and forcing it could short something).
These boards were built for office environments. They aren't flashy, but they don't die. The VRMs are basic but sufficient for 65W–77W CPUs. acer h61h2-ad
He spent the next hour tracing circuits with a multimeter. The H61H2-AD was a layout of compromises. It supported Intel’s second and third-generation Core processors—i3s, i5s, and i7s that had revolutionized the market a decade ago. But this board was a budget implementation. It lacked the robust power delivery of the enthusiast P67 or Z68 boards. It was a workhorse, not a racehorse, and workhorses die when they’re overworked. Most standard motherboards use a 24-pin power connector
"Put it in the 'salvage' bin," Elias said. "It’s earned its rest. But tonight? Tonight, the H61H2-AD was a hero." These boards were built for office environments
While the H61 chipset technically supports SATA 3 (6Gb/s), many revisions of this board only wired up the SATA 2.0 ports. If you install a modern SSD, you will be capped at ~250 MB/s read speeds. It’s still much faster than a hard drive, but you aren't getting the full speed of a modern NVMe or high-end SATA SSD.