MikeJRamsey :
For your home desktop computer, have you stepped up to an uninterrupted power supply with online topology, pure sine wave output waveform, or both? If so, what were your reasons for deciding that line interactive topology and stepped sine wave output waveform was not good enough?
I am trying to decide on a new UPS and was wondering if a higher end UPS was worth the 2X price tag.
See the following if the terms are unfamiliar.
http://www.tomshardware.com/forum/248245-28-tomshardware
I have a Dell XPS9000 computer. It has "active power factor corrected power supply" ( Maybe the term is "correction")
My Tripplite G1000U UPS worked very well with my old Dell Dimension 8400, probably saving my motherboard many times, as we live in an area subject to momentary outages and surges. The Tripplite UPS many times gave an audible signal and went to battery power, and all was well.
The Dell XPS series is incompatible with the stepped approximation to sine waveform. Its internal power supply cuts off virtually instantaneously when the Tripplite G1000U goes to battery power, which is a bad thing and can cause serious instability depending what you were doing when it happened.
I telephoned Tripplite, and complained that their UPS did not work. Their tech support man asked me if I had a Dell XPS, right away. When I said Yes, he told me that was the problem.
The Dell website offers to sell several UPS units, none of which will work with their XPS computers. Bad!
I contacted CyberPower to ask if the UPS unit being sold by Dell would work with a Dell XPS. The e-mail informed me absolutely NOT. A telephone call to their tech support confirmed that truth. A UPS has to be designed specifically to work with the "active power factor corrected power supply" in certain computers. For Cyberpower, such a unit is the CP850PFCLCD. The "PFC" means "power factor correction." CyberPower units with "AVR" in the model number will not work, and that is what Dell is selling!
As I now understand the issue from extensive discussion with Tripplite and CyberPower experts, some of the replies in this thread are not correct. My newer Dell was built in late 2009. It is therefore plainly "post 2004." It absolutely cannot handle the "garbage" mentioned in one post in this thread. I advise all concerned to talk with a manufacturer's expert if you need the actual facts.