UPS trouble

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MyWorld

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I have a problem with UPS and my PC system for years now, and I have tried everything I can think off, but to no avail.

The problem:
If there is a dip in the power the PC just shuts down like there were no UPS, it just loses all power.

I have changed UPS', changed the batteries inside the UPS, changed power outlets, used those expensive charge protector plugs, so far nothing has worked.

The odd thing is that everything works on the wife's PC. If the power trips (or a dip like this morning) her PC keeps going. I have a 2x600VA UPS systems, one for each of us.
I thought it could be that my PC is to powerful, but if I upgrade my old PC goes to the wife, and still her UPS catches all the dips and trips and mine still fails. Like I mentioned, I have switched UPS' on many occasions, still no luck.

What else can I do to test or rectify this?
 
Complete shot in the dark here but perhaps your pc's PSU is more sensitive to the switchover time of the UPS than your wife's PSU.
 
Buy a new one, I'm afraid. The boards are made really cheaply and there are stressed components on there. The switching is done by a SCR (silicon controlled rectifier) and these can deteriorate. If you can identify this (it is quite large and looks like a diode) then you can try and replace it. They don't cost much. Get one rated for 20 amps.
 
find out what PSU you got.google the upkeep time. may be 20ms or something like that.then google the responce time of the UPS.good way to start the fault fingding procedure.GL
 
MyWorld said:
Like I mentioned, I have switched UPS' on many occasions, still no luck.
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If you are switching the PCs between UPS units , and your PC continues to fail, then the problem lies with your PC.

It sounds like PSU problems, though no guarantee. Gigabyte PSUs are not amongst the best ...
 
MyWorld said:
My PSU is a Gigabyte 650W
Click to expand...

You really shouldn't be running a UPS over (in my experience) over 3/4 its rating, and certainly not over its rated output. You should be using atleast a 1000VA UPS (for safe operation and room to upgrade), regularly testing the batteries.
 
I suggest to get technician to open PSU and check whether input filter is missing. Glitches cause overvoltage protection to activate shutdown.
It would be empty spaces on PCB near fuse. It can be replaced from a broken PSU with similiat rating. The cheapest way to fix cheapo PSU.
 
Cadavre777 said:
You really shouldn't be running a UPS over (in my experience) over 3/4 its rating, and certainly not over its rated output. You should be using atleast a 1000VA UPS (for safe operation and room to upgrade), regularly testing the batteries.
Click to expand...
Surely the PSU watt rating is the max, not the actual load? I reckon its probably running at <50% of UPS capacity on normal load. Sure there is a spike at the start, but even that shouldn't exceed 600W.
 
HavocXphere said:
Surely the PSU watt rating is the max, not the actual load? I reckon its probably running at <50% of UPS capacity on normal load. Sure there is a spike at the start, but even that shouldn't exceed 600W.
Click to expand...

I agree it shouldn't even hit 600W, at that point you're exceeding 90% of its rated output which can damage the PSU long term. One would have to calculate the entire power consumption of the system to match it up with an appropriate UPS. The problem comes in when people select a UPS based on their systems power consumption but forget that the batteries int he UPS don't work well after the charge has been depleted beyond a certain percentage (varies between manufactures). You need to over provision to keep those batteries working properly (or add more).

Age of the batteries also comes into play, you SHOULD replace after 3 years but some brands under certain conditions can last 5.
 
bekdik said:
Do you have your monitor, laser printer or any other equipment plugged into your UPS?

Have you tried plugging your UPS into a different power point?
Click to expand...

Nope, I unplugged everything except the PSU from the UPS.

Yes, I have tried different power outlets.

I'll save up a bit and get another, more reputable brand, maybe that should help.
:(
 
HavocXphere said:
Surely the PSU watt rating is the max, not the actual load? I reckon its probably running at <50% of UPS capacity on normal load. Sure there is a spike at the start, but even that shouldn't exceed 600W.
Click to expand...

You realize of course that 600VA is at the battery of the UPS and not what goes into the PSU of the computer, right? You're looking at a peak load value of closer to 360W, which easily gets hit if a powerful machine goes under full load. Besides that, running a PSU at full capacity is never a great idea.
 
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