Ups for 750Watt PC
Ups for 750Watt PC
Hey everyone! I'm facing a power issue at home and was wondering what kind of UPS would be best for me.
I have a 750W PC and a 240Hz Alienware monitor.
I'm considering a Powertech UPS Line-Interactive 1150VA 690W model.
I just need to know if it will give me enough time to safely shut down the PC or quickly restore power after the outage.
It only takes about 5 seconds to do that.
Can you confirm if this setup is sufficient?
My system specs are: z390 Aorus Elite, i7-9700K, RTX 2080 Aorus, 32GB RAM, one SSD and one HDD, a Coolermaster ML360R, a 750W Corsair PSU, plus three extra fans inside the case.
Thanks in advance!
If you have the funds, choose this option;
https://www.skroutz.gr/s/374107/Cyb...iv...-Plug.html
Additionally, I was searching for a UPS without considering my budget, location, or preferred site. I ended up on a Greek page. I would consider a model with a bit more capacity, as it won't be a problem for future system upgrades.
This simulation does not match the ideal backup for computers. When searching for an UPS, consider these aspects:
- Waveform (square, simulated sine, or real pure sine)
- Design options (stand-by, line-interactive, online)
More details on waveform and design can be found at:
https://www.kstar.com/indexproblem/17355.jhtml
And explanations regarding UPS types are available here:
https://www.eetimes.com/document.asp?doc_id=1272971
Waveform and design specifics
For computers, a line-interactive UPS is generally sufficient because standard PSUs manage the quick transition times (2ms to 5ms) of line-interactive units.
Regarding waveforms, real pure sine wave UPSes are preferable. Simulated sine wave models are more affordable but incompatible with PSUs that use Active PFC. Running a simulated sine wave UPS with an Active PFC PSU may lead to significant problems—here’s what happens, how it occurs, and why.
How do you identify which PSUs support Active PFC and which don’t?
It’s straightforward: any PSU certified at 80+ (such as 80+ Bronze or 80+ Gold) includes Active PFC.
What is Active PFC?
Further reading:
https://en.wikipedia.org/wiki/Power_fact...near_loads
Consequences of using simulated sine wave UPS with Active PFC PSU
Switching to battery power from a simulated sine wave UPS can trigger one of three outcomes:
- The UPS shows an error and forces the PC to shut down instantly.
- The PC shuts down immediately.
- The UPS powers down, causing the PC to turn off while still connected.
Why this occurs?
Simulated sine wave UPSes create a zero output during phase transitions, leading to a power interruption for Active PFC PSUs when shifting from AC to simulated sine wave (battery mode).
What should you do next?
As mentioned, your computer can operate on a simulated sine wave UPS, but be ready for potential issues. If problems arise, consider replacing the simulated UPS with a true/pure sine wave model or opting for a pure sine wave UPS from the start.
Power requirements
When selecting a UPS, factor in the power consumption of your PC and peripherals. Don’t forget speakers, Wi-Fi routers, or additional devices—check your manual for their wattage. Printers, scanners, and similar equipment often draw excessive power and could damage your UPS if not properly accounted for.
Setting a PSU’s maximum wattage as a baseline is wise, offering more runtime and better performance. With a 750W PSU, you might add one monitor (typically 23W–52W depending on size). For precise energy use, provide your monitor model or part number, plus any other hardware details. Also, specify your location so I can recommend UPS models with compatible power outlets. Wi-Fi routers generally consume minimal power. For example, a Cisco EPC3940L uses 12V at 3A (36W).
Recommended UPS brands include CyberPower, TrippLite, and APC—considering these are among the top choices.
Note: A more robust UPS extends how long your PC stays running before the battery fails.
Also, I currently use two CyberPower CP1300EPFCLCD units with my PCs (as referenced earlier).
For visual confirmation, see the attached spoiler image (click to view).
Spoiler:
My UPS models
Top left: After unboxing
Top right: Power-on test
Bottom left: Haswell build UPS in service
Bottom right: Skylake build UPS in service
Thanks in advance! Yes, it would have been better if a budget had been included, that's my responsibility. Coming from Greece, skroutz really works! I'm currently searching for something affordable but might be able to manage around 150 later. That one seems a bit pricey for me.
It looks like you've significantly overlooked the expense of a UPS. Because its purpose is to maintain your PC's operation during power outages by providing stable electricity, it comes with a high price tag. For instance, I spent €230 for one 1300VA/780W UPS and now own two. That brings my total to over €450.
Since your PC is costly, replacing it isn't simple. Whether you prefer it or not, protection isn't cheap. However, if you're looking for affordable yet effective UPS options, consider purchasing two units—one budget-friendly and one reliable.
Or, another perspective: imagine buying a budget-friendly simulated sine wave UPS that fails to protect your PC during power loss. What then?
When discussing PCs, there are two essential aspects to avoid cutting corners on: power supply and uninterruptible power supply. As both manage power distribution, they must be of high quality. Otherwise, you'll encounter problems—affordable UPS won't keep the system running and a budget PSU might fail at any moment, potentially damaging connected devices. The rest can be sacrificed, particularly the graphics card.
I tend to opt for a less powerful or cheaper GPU rather than a more expensive PSU or UPS. In fact, I've already made that choice.
In 2016, when assembling my Skylake build (with full specifications and photos in my profile), I faced a decision:
- GTX 1060 6GB paired with a more affordable but still decent Seasonic M12II-620 EVO (80+ Bronze) PSU.
- Or GTX 1060 3GB with a superior Seasonic PRIME 650 (80+ Titanium) PSU.
I experienced no issues using the weaker GPU, as it allowed me to get the best 650W PSU available. Since the PSU is responsible for powering the entire system, it stands out as the most critical component, surpassing the importance of the GPU in my setup.
I get it. I think I'll have to wait a while and find a reliable UPS. Just praying for fewer power outages until I can afford one.
Thanks a lot!
The initial step is to obtain a power meter. This version is for the US –
https://www.amazon.com/P3-P4400-Electric...9MDBU?th=1
However, a comparable device should be available for your country. Without understanding real power consumption, it's impossible to properly size a UPS.
I'll attempt to secure something reliable to confirm my requirements.
Tested on a site estimating the necessary wattage, it suggested about 469 watts and 960VA.
I plan to aim for a higher budget and choose a better option to ensure safety!