If the PSU runs on multiple rails, one of the rails may be able to handle the load, while other rails may appear to be working perfectly, seen it one of the PSU I fixed, that's why I generally go for PSU with a single rail nower days.
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If the PSU runs on multiple rails, one of the rails may be able to handle the load, while other rails may appear to be working perfectly, seen it one of the PSU I fixed, that's why I generally go for PSU with a single rail nower days.