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Message: <blockquote data-quote="Anusha" data-source="post: 165806" data-attributes="member: 828">Oh ok. Seems like I'm the only one having this problem in this whole community. I have solved this problem however. Just wanted to know what you thought about it and help others if they have this problem too.It wasn't the UPS!!! It was the power supply.Every Power Supply Unit has a thing called hold back time (the terminology may slightly differ however). This shows how long the power supply can hold PC working, even after the power fails. Obviously this is int milliseconds. This is what an UPS exploits when switching to the battery. The Power Supply Unit's hold back time should be longer than the UPS' switching time.The hold back time is determined by the capacitors inside the Power Supply Unit. When a bigger load current is drawn from the capacitors, they discharge quickly, and the hold back time will dip. That's why it might reset the PC when doing a stressful task, than when lying idle. The generic power supplies we get in Sri Lanka for around Rs.1,500 or even less are not good. Their hold back time maybe be enough when no so much power is drawn from the power supply, but once a high power is drawn, the hold back time will go down tremendously. I don't think the UPS we get for around Rs.4,000 are bad. But a faster switching UPS would have been able to cancel the incapabilities of the power supply unit, but by how much?I had to buy a good power supply to get rid of this ghastly problem. This is a server power supply (well, that's what they call it), and I had to spend Rs.5250 on it. It's still not the best by all means, and enthusiasts will call this a very low end power supply unit. But at least, I got my problem solved by buying this power supply.</blockquote>

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