The Socket 939 Appreciation Club and Knowledgebase [Official] - Page 1169 - Overclock.net

Hueristic · 01-23-09

Quote:

Originally Posted by thlnk3r

Some users wonder why their four computers, 3 LCD's, Stereo, pencil sharpener, two lights, fish tank pump ect didn't stay on during an outage....geee I wonder why.

LOL, Yeah I don't even plug the monitors into them.

Xyro TR1 · 01-23-09

Pio, did you happen to say how old the UPS units are? If they're beyond 5 years, I would recommend replacing the whole unit, not just the batteries.

I have a 1500VA APC that runs my server for over two hours, or both my server, main desktop, 2x 22" LCD's, a 17" LCD, and my halogen lamp for about 20 minutes. I love it.

BlackOmega · 01-23-09

Quote:

Originally Posted by thlnk3r

Omega, that is an awful lot of power. I did some testing at work with a Ultra 1000VA UPS. Price tag was roughly in the $100 range. With (2) computers and (2) 17" I-Inc LCD's connected to the battery backup port, the UPS stayed on for 36 minutes and 31 secs (21% load). With the computers being at full load, the UPS stayed on for about 16 minutes and this was between 36 - 40% load on the UPS device. Granted the machine wasn't set up like ours (P4 1.8Ghz, 256MB, 40GB) but still wasn't to bad. It makes sense to have one computer plugged into a lower VA UPS and not several. Some users wonder why their four computers, 3 LCD's, Stereo, pencil sharpener, two lights, fish tank pump ect didn't stay on during an outage....geee I wonder why.

Pio, perhaps moisture might of gotten to them and caused some damaged. The age of the devices doesn't help as well.

Good luck

Yeah some of the ones I was looking at were considerably more than that. I figure if I have both of my rigs (soon to be 3), a monitor, my wife crapintosh all plugged in to it then I wouild even need considerably more than that. On the safe side in order to get any sort of decent time after an outage 2550w

probably enough for a server or 2

.
Like I said I cant recall the formula off the top of my head. I bet it also varies from manufacturer to manufacturer. The ones they had me install at work were such POS's that they would keep a 1.8 P4 on for maybe 5 minutes. And those I believe were 550w and the PSU's on those P4s were maybe 300 at the most. I tried telling them that they werent powerful enough and that theyre jsut wasting their money. They didnt believe until the first outage, when the UPS's didnt even keep the computers on for a minute. They had plugged in the dealerships server + one of my computers in the parts dept.
The actual IT guy did that. He also thought that shutting down computers at night was a bad idea because it would shorten the life span of the computer.

Whatever. I was just trying to save the dealership money by powering off all the unneccessary computers at night. Which amounted to something along the lines of 40 computers. That would save a pretty penny every month. Oh well, their loss.

Xyro TR1 · 01-23-09

I don't know where you got the idea that you need a UPS that is rated for double the wattage that your system's PSU is rated for. Example: here at work, I've got a 450W (peak) PSU, and my UPS up here is rated for 475W.

At home, I've got a VX450W and a VX550W (server and sigrig, respectively) plugged into one of these, as well as a ton of other stuff, and I still get decent run time with everything on. The realtime power draw on those is about 450W total, so going off of your PSU's max rating isn't saying much. My Opty 180 rig pulled even less, even with both 4850's. So, I think you're overestimating how big of a UPS that you need.

pioneerisloud · 01-23-09

Quote:

Originally Posted by Xyro TR1

Pio, did you happen to say how old the UPS units are? If they're beyond 5 years, I would recommend replacing the whole unit, not just the batteries.

I have a 1500VA APC that runs my server for over two hours, or both my server, main desktop, 2x 22" LCD's, a 17" LCD, and my halogen lamp for about 20 minutes. I love it.

My current UPS devices are about 8 years old, and they were used when I got them. Like I've said, I'm just going to use a good surge protector now (pulled from my living room entertainment center). I can't afford to go out and buy some new UPS's, so a good surge protector is a LOT better than nothing.

Xyro TR1 · 01-23-09

Quote:

Originally Posted by pioneerisloud

My current UPS devices are about 8 years old, and they were used when I got them. Like I've said, I'm just going to use a good surge protector now (pulled from my living room entertainment center). I can't afford to go out and buy some new UPS's, so a good surge protector is a LOT better than nothing.

Truth. I was meaning for in the future, if/when you were debating on replacing just batteries or the entire unit.

My HTPC will be on just a surge protector. It wasn't until a few months ago that I even had a battery backup.

BlackOmega · 01-23-09

Quote:

Originally Posted by Xyro TR1

I don't know where you got the idea that you need a UPS that is rated for double the wattage that your system's PSU is rated for. Example: here at work, I've got a 450W (peak) PSU, and my UPS up here is rated for 475W.

At home, I've got a VX450W and a VX550W (server and sigrig, respectively) plugged into one of these, as well as a ton of other stuff, and I still get decent run time with everything on. The realtime power draw on those is about 450W total, so going off of your PSU's max rating isn't saying much. My Opty 180 rig pulled even less, even with both 4850's. So, I think you're overestimating how big of a UPS that you need.

Im just going from memory, about the manual I read (months ago) for this particular UPS, of which I honestly dont even remember the brand. There was a formula for how big of a UPS you need. And I wasnt suggesting 2x the rated power ouput but merely 1.5x. So considering my PSU is 750, my other rig has a 500, and I was guesstimating my wife crapintosh @ 450 (or something along those lines). I actually didnt even factor in my monitor.
So that way you'd have more than 5 minutes to shut everything down. A little overkill in this regards doesnt hurt anything. Itll just keep you running for longer.

Xyro TR1 · 01-23-09

Quote:

Originally Posted by BlackOmega

Im just going from memory, about the manual I read (months ago) for this particular UPS, of which I honestly dont even remember the brand. There was a formula for how big of a UPS you need. And I wasnt suggesting 2x the rated power ouput but merely 1.5x. So considering my PSU is 750, my other rig has a 500, and I was guesstimating my wife crapintosh @ 450 (or something along those lines). I actually didnt even factor in my monitor.
So that way you'd have more than 5 minutes to shut everything down. A little overkill in this regards doesnt hurt anything. Itll just keep you running for longer.

I'm in support of overkill.

Why else would I have a 450W PSU in a server that barely draws 80W on it's busiest days?

pioneerisloud · 01-23-09

I still have no idea if my main rig survived for sure....

BUT, PR1M3R from OCN (local guy for me) is being kind enough to invite me over tomorrow afternoon for some testing. He offered to let me use his BFG 550w Modular PSU to test my components out, to see what all (if anything) is dead. He's also letting me borrow "some cheap" AGP graphics card, so I can test out my new server stuff, to see if its my card or the AGP slot that's dead.

So I will know by tomorrow night what all survived my PSU dying on me.

blitz6804 · 01-23-09

The UPS in my sig has not yet steered me wrong. With its age, it is on its second set of batteries. A third set may not be too far away. I am also looking into buying the supplemental battery pack which supposedly triples battery life. At full tilt (desktop doing GPU folding, laptop doing SMP folding, PS3 folding) I get about 5 minutes battery life. Under usual usage (desktop is the only thing on, using Firefox, 7 IM clients, and WMP) I get about 21 minutes. Under that load setting (1.25 GHz processor) I draw about 321 W including speakers and monitor.

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