What is the recommended UPS VA (or Wattage) for my PC?

[jvmunhoz]

Although I have a Corsair AX1200i, I don't use all of it. I have an Asus Rampage V Extreme, an AMD 295x2, an I-7 5930k, 16GB RAM and a H110i water cooler.

As for the 295x2, I know that, when fully stressed, it reaches about 450W of consumption.

I can't test the system as a whole as my PSU has recently fried D: That's why I'm searching for a UPS, actually.

An approximatte guess would be welcome already.

Thanks in advance

 

[little_me]

total wattage times 1.5 gets you close to truth.
so if total wattage is 450 (gpu) + 84 (CPU) +10 (RAM) +5 (ssd) +random other stuff, you get about 600W total, thus I wouldn't go below 1000VA UPS.
more room means pretty much more time to normally shut it down in case of power outage (and gives room for parts upgrades) so 1200 to 1500VA

Edit: also since said power supply has active power factor correction, it might not be compatible with all UPS's verify that it will work before investing.

 

[jvmunhoz]

600W seems kinda low to me, with all the peripherals and everything else consuming only 150W. Wouldn't the Motherboard consume quite a bit of energy as well?

As for the Active PFC, I know that I must buy an UPS which delivers a Pure Sine-wave so that there aren't any compatibility issues.

 

[little_me]

This is APC's take on the matter:
http://www.apcmedia.com/salestools/RMUZ-7DTKRC/RMUZ-7DTKRC_R1_EN.pdf?sdirect=true
in short, UPS's with pure sine wave are pretty good for it. (for PSU's with active power factor correction)

or you could google for UPS +pfc for lots of discussions about if/why it might be needed.

It could work with any UPS just fine or... not. In case of it not working you have to replace either UPS (to sine wave version) or PSU (to non PFC version). In these cases I would go for safety and pick something more costly that would work.

I am pretty sure that if you google UPS type you are planning on and pfc, you can find out if said UPS supports it. Or manufacturers site would most likely list it in their specs too.

Edit:
Yes, "and random other stuff" Listed wattage totals to 549, not 600. 1.5 times 600=900, so I said 1000 minimum, preferably along 1200 to 1500 range. Most UPS's are lot happier if they don't live on the "edge" so to say.