Wow! Some people want so much information, that they can only manage to confuse themselves in the end.
I just got off the phone with a guy that insisted I tell him what the amperage draw off of the wall outlet is for a power supply he had received from us.
I was so taken off guard by the question that I ummed and awwed and eventually put him on hold so I could take a St. John's Wort and a swig of Mountain Dew. The amperage draw is probably only like 4 or 5 Amps tops with your typical build, but still. Who cares!??! Are you hooking it up to a Honda generator?
I got back on the phone and said to him that I did not have that information, but was curious as to what he needed the information for.
He told me that he was buying a battery back up and wanted to know what the amperage draw of the computer was so he could determine what VA rating of UPS he should buy.
I explained to him that the PC's draw is going to be the least of his worry and that the monitor should be his biggest concern.
He said he just wanted to be sure that he bought a UPS with enough juice to cover both the PC and the monitor.
I then explained to him that they put information on the box of the UPS that explains how long a particular UPS is going to last with a particular monitor.
He said, "Right, but it doesn't say anything about the power supply. What if one guy has a 200W and the next have a 400W. Shouldn't that be taken into consideration?"
"Actually, No." I responded, "Fact is the difference between a 200W and 400W at the wall is only going to be 1 or 2A on a 120V line! It's NOTHING! And that's assuming that the PC with the 400W power supply is even a PC that NEEDS that much more power!"
He was very skeptical of my response, "Hmm.... I don't know. I think I would want to buy a larger VA UPS for a bigger power supply. Mine's a 300W, therefore I would think that I would need a larger UPS than someone would with a 150 or 200W"
I'm thinking, this guy and 90% of the freaking population have a 300W power supply! Come on! I'm starting to get a little tired of this conversation so I tell the gentleman to just go out and buy a UPS like a 1000 VA, that's much, much more that he could possibly need.
"No... That would be foolishly expensive. If I don't need it, why buy it?"
"OK... Fine. What size is your monitor?"
He tells me that it's a 17" monitor. Cool, I'm ending this conversation right now.
"OK, sir. I can recommend a 420 VA UPS for use with your 17" monitor and your 300W power supply powered PC. This should give you about 30 minutes of use after a power failure."
"30 minutes?" He says, rather surprised. "Heck! I don't need to be on for 30 minutes. What do you think I need if I only want it to run for 5 minutes?"
UNBELIEVABLE! What a putz! The end of the rope has been met. I grasp the phone cord in my fist and start my final sentence. "Well sir, if 5 minutes is all you are looking for..." YANK!