>900watt Desktop UPS?

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IamSpartacus

IamSpartacus

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Mar 14, 2016
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I'm looking for a desktop (it's going to sit on the floor under my desk) UPS that is greater than 900w to power my new Threadripper 1950x dual 1080Ti workstation.

I'm having trouble finding any non rack mountable solutions that are over 900w.
 
IamSpartacus

IamSpartacus

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amalurk

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Never owned a Tripp Lite just APC and Cyberpower. Had two Cyber powers go bad at the exact same time that were on same circuit powering different small tower servers. Both servers were okay so I guess they did their job. It was an old building and the breaker tripped so I guess building power sucked and caused it.
 
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StammesOpfer

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IamSpartacus said:
The 1500VA in the US is 900w.
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I don't know how much this helps you but they calculate that 900w based on a 60% power factor which was established before Power Factor Correction (PFC) was common on power supplies. Modern power supplies have Active PFC which should give you 95-99% power factor thus a much higher usable wattage.

Also I have 3x Cyberpower desktop style CP1500PFCLCD only had to replace a battery once. Rackmount I tend to go Eaton.
 
EffrafaxOfWug

EffrafaxOfWug

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Feb 12, 2015
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Never used any myself but heard several people at work tell me cyberpower are, in general, trash.

Another shufti around resellers show the APC SMT1500I (charitably "desktop"), SMT2200I and SMT3000I (stand-up units) capable of powering >900W under 240V but I don't see them being sold in the US, I'm guessing 110V working against you here. Think you might be looking at one of the rackmount-unit-on-its-end if you really want the 900W.

Is 900W really your active load?! Being my normal pessimistic measure-everything-for-yourself self I'd recommend taking a power reading at the socket to budget what you max. active load really is, especially as it might save you a small fortune in buying a UPS.
 
IamSpartacus

IamSpartacus

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It's likely not, but I'm being conservative. My build isn't done yet so I can't take readings but it will consist of the following items:

TR1950x (180w)
Dual 1080Ti FTW3's (280w each)
Dual Port Intel X540 10GbE NIC
Dual NVMe M.2 drives
14 fans
Dell 38" Ultrawide monitor
Netgear GS110EMX Switch
 
EffrafaxOfWug

EffrafaxOfWug

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Pointless powering the monitor (and potentially the switch depending on what else you have running off it) from the UPS IMHO - if you're at the machine you're still going to want to be powering down/hibernating automatically. But I assume you'll also have a server somewhere running as a UPS master and will need to factor in the load for that as well?

Personally I usually test UPSs on real-world loads rather than theoretical maximums, but I've never really specced one for being able to play a game in SLI whilst maxing out the CPU doing something as well. Possibly you might see the workstation drawing significantly less than 900W in real-world usage...
 
IamSpartacus

IamSpartacus

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EffrafaxOfWug said:
Possibly you might see the workstation drawing significantly less than 900W in real-world usage...
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I certainly hope so, less is definitely better. I just want to be sure that the UPS can handle whatever my max draw will be on this system at any given time. My plan is to do some stress testing before I purchase the UPS so I'll know more than. I'm just in the information gathering phase so once I have the raw numbers I know exactly which UPS to pull the trigger on.
 
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ww2planes1

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Mar 26, 2018
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I found a few options on Cyberpower's website:
1500VA/1050W:
Where to Buy OR1500PFCLCD | Product Specifications

And another one (if you prefer one with network support):
Where to Buy PR1500LCD | Product Specifications

And a 2200VA/1980W model, but this will require a 20A outlet (uncommon in residential applications):
Where to Buy PR2200LCDSL | Product Specifications

Though unless you need the extra runtime or network features, it probably makes the most sense to wait until you get the system built, check the actual power draw. You could buy two of the CP1500PFCLCD UPSs for the price of the PR2200LCDSL...
 
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bobfig

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the issue i see is if you get any higher then the 1500VA UPS's you ether need to make sure they are wired to a 20amp braker and have the 20amp plug that has one of the pins sideways.

that is why it is hard to find one with higher then 900watts.

i have done some installing in schools around me with some 1500va, 2200va, 4000va, and 9000va. the 1500va was fine in a regular wall socket and the 2200 needed the 20amp style. the +4000va needed to be hard line directly into the power.


my self i am running a cyberpower 1500va pfc and dose just fine. can do about 30min on just web browsing when the power goes out at a 160w load.

this is with a 6700k, 1080, 3 hdd, 1 ssd, and various water cooling.
 
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Joel

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Even with a 20% deload, a 15A breaker should be able to handle 1440w (1800*.8) continuous draw. I've actually tested one to about 1350 (all on a single plug no less) and it did just fine for days on end.
 
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bobfig

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Joel said:
Even with a 20% deload, a 15A breaker should be able to handle 1440w (1800*.8) continuous draw. I've actually tested one to about 1350 (all on a single plug no less) and it did just fine for days on end.
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i agree but try finding a ups above the 2kva and see what wall plug they use. im not saying you are wrong just that i dont want some one buying a large ups and end up having to replace the wall plug or circuit to run that ups without knowing.

most average 1500va and lower have the nema 5-15p where most 2kva and up with have at least a nema 5-20p with the sideways prong. just look at the specs of all the ups's

 
IamSpartacus

IamSpartacus

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Just wanted to update you guys that I wound up going with the CyberPower CP1500PFCLCD 900w UPS. Killowatt showed I'm only using 500w from the wall mining with CPU and both GPUs and I'll never go higher than that in almost any scenario I can think of.
 
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Joel

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IamSpartacus said:
Just wanted to update you guys that I wound up going with the CyberPower CP1500PFCLCD 900w UPS. Killowatt showed I'm only using 500w from the wall mining with CPU and both GPUs and I'll never go higher than that in almost any scenario I can think of.
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If it has USB connection to the PC you could program it to stop mining immediately when on battery, then wait a while for power to come back and either resume when AC comes back, or shutdown. Might make for an interesting project.

Personally I never worried about putting my miners on an UPS; I just set everything to auto start the system after power loss and configure everything to start mining as soon as booting is complete. Of course for workstation/ZFS use in addition to mining I'd definitely do what you're doing.
 
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bobfig

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IamSpartacus said:
Just wanted to update you guys that I wound up going with the CyberPower CP1500PFCLCD 900w UPS. Killowatt showed I'm only using 500w from the wall mining with CPU and both GPUs and I'll never go higher than that in almost any scenario I can think of.
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congrats that is the one i am using also for my desktop and has been good to me for a year or so.

only other thing i could of recommend would be to get the one with the add on battery pack to extend the time but would of been more money.
 
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