Is this UPS enough for my PC

[A7XX]

Hi, I am trying to buy a UPS for my rig, I have looked into a lot of guides and videos but there isnt enough information about it, also I have seen some online calculators but they do not have sufficient info for me so if you have knowledge let me know.

My PC:

CPU: AMD Ryzen 9 5900X

Cooler: Noctua NH-D15

MotherBoard: MSI MPG X570 GAMING PRO CARBON WIFI AM4

Ram: G.Skill Trident Z Neo Series 32GB (2 x 16GB) 288-Pin SDRAM PC4-28800 DDR4 3600 CL16

GPU: AMD Radeon 6900XT

PSU: Corsair HX Series, HX1200, 1200 Watt, Fully Modular Power Supply, 80+ Platinum Certified

Monitor: Asus VG27AQ (27inch 1440p)

Internet Router

 

The PSU specs am looking at are: 1600VA/900 Watts

Is this enough?

 

[191x7]

5 minutes ago, A7XX said:

Hi, I am trying to buy a UPS for my rig, I have looked into a lot of guides and videos but there isnt enough information about it, also I have seen some online calculators but they do not have sufficient info for me so if you have knowledge let me know.

My PC:

CPU: AMD Ryzen 9 5900X

Cooler: Noctua NH-D15

MotherBoard: MSI MPG X570 GAMING PRO CARBON WIFI AM4

Ram: G.Skill Trident Z Neo Series 32GB (2 x 16GB) 288-Pin SDRAM PC4-28800 DDR4 3600 CL16

GPU: AMD Radeon 6900XT

PSU: Corsair HX Series, HX1200, 1200 Watt, Fully Modular Power Supply, 80+ Platinum Certified

Monitor: Asus VG27AQ (27inch 1440p)

Internet Router

 

The PSU specs am looking at are: 1600VA/900 Watts

Is this enough?

 

The safest way would be to measure the power draw from the socket and decide based on the peak draw + adding some space.

Your system, with the display and everything, shouldn't exceed 750W under heavy load so a 900W UPS should be enough not to freak out if you happen to game while the power goes out.

Many people would take the PSU wattage, add the draw of the monitor, speakers, etc., and take that as the recommended UPS strength. In that case, that would probably be 1400W. Such a UPS would be able to hold your system for tens of minutes under a heavy load, and the battery should have a longer life.

[Flying-Dutchman]

And how long do you want to power this all still when main power goes away? Just graceful shutdown? Or do you plan to be able to work for some X period? You plan to run fully loaded on that system also from backup power?

[A7XX]

12 minutes ago, Flying-Dutchman said:

And how long do you want to power this all still when main power goes away? Just graceful shutdown? Or do you plan to be able to work for some X period? You plan to run fully loaded on that system also from backup power?

yea I just wanna be able to shut down my pc

[aggie113]

If you just want the PC to be able to shut down gracefully then you don't need much.  Make sure the UPS has a USB connection to your desktop and configure the settings correctly to let it know to shut down once battery gets to x%.  If you want to keep on rolling regardless of power outages then up your battery game to keep it powered for longer.  

[A7XX]

13 minutes ago, 191x7 said:

The safest way would be to measure the power draw from the socket and decide based on the peak draw + adding some space.

Your system, with the display and everything, shouldn't exceed 750W under heavy load so a 900W UPS should be enough not to freak out if you happen to game while the power goes out.

Many people would take the PSU wattage, add the draw of the monitor, speakers, etc., and take that as the recommended UPS strength. In that case, that would probably be 1400W. Such a UPS would be able to hold your system for tens of minutes under a heavy load, and the battery should have a longer life.

thats what i was thinking, I dont think i will be able to draw more than ~700 watts but I wanted to make sure

[A7XX]

1 minute ago, aggie113 said:

If you just want the PC to be able to shut down gracefully then you don't need much.  Make sure the UPS has a USB connection to your desktop and configure the settings correctly to let it know to shut down once battery gets to x%.  If you want to keep on rolling regardless of power outages then up your battery game to keep it powered for longer.  

is the one I suggested enough then? 900 watts should do the job right?

 

[aggie113]

1 hour ago, A7XX said:

is the one I suggested enough then? 900 watts should do the job right?

 

Should be fine for a desktop setup.  VA is how long, W is how much (to simplify).

[mariushm]

The VA rating should be at least 1.5x the power consumption of your computer and everything plugged into the UPS.  

 

So if your computer consumes 500 watts when you're gaming and your monitor consumes 50 watts and you plug other things worth 50 watts, then look for at least 1.5x x (500+50+50)  = 900VA or more. 

 

The VA rating is just how much power the UPS can provide to the components, it doesn't tell you anything about how long it can last at that output power level.

A cheap UPS may have a single 12v 7Ah battery that will basically discharge in 3-5 minutes with 500w+ output to components, so it's very important that as soon as power fails, you get out of the game or whatever makes your video card consume a lot of power. 

A better ups may have 2 or even 4 9Ah-12Ah batteries in series or parallel, so they'll have longer life like 15-25 minutes at 1000w output for example.  

 

If you want something high quality and that can last a long time on batteries, it may be worth looking into buying a datacenter grade UPS without batteries and buying your own batteries.

 

For example - random example at a quick search on eBay -  https://www.ebay.com/itm/332212230531  

- $90 plus shipping for high quality double conversion pure sine wave output,   Avaya/Powerware (Eaton) 9125 1000i 1000VA/700W 230V without batteries  ... takes 2  12v 9Ah batteries internally and supports external battery modules (EBM24) you can add to extend life - 8 batteries x 12v 9Ah increases the runtime at full load from 5 minutes to 48 minutes. 

 

 

[wONKEyeYEs]

6 hours ago, A7XX said:

is the one I suggested enough then? 900 watts should do the job right?

 

We have almost the same system.

When pushed I can hit around 660W at the UPS.

This includes a couple of monitors.

Although I did see unusual spikes while folding of 858W in HWINFO64.

I have a CyberPower GX1325U UPS which is 810W.

The 1600VA/900W unit should be good.

[JovanD]

If you can get a UPS with lifepo4 battery that would be best, most lead acids get issues after 2 years, it's luck of a draw if you get worse capacity(best case scenario) or they become unusable(large voltage drops on normal loads) suddenly.

Best deal might be to look for  used UPS with dead batteries and than swap in lifepo4 pack.