I've built this basic PC desktop:
- Corsair CX450 PSU (OEM CWT RPS0053) with active PFC = 450W max
- CPU amd ryzen 2200g = cTDP 46-65W
- mobo msi b450-a pro = honestly I don't know how much Watts
- ram HyperX Predator DDR4 HX432C16PB3K2/8 Kit 8 GB (2 x 4 GB), 3200 MHz, DDR4 CL16 DIMM = I don't know exactly but I guess about 2x1.5W = about 3W
- hdd WD black @7400rpm (WD1003FZEX-00K3CA0) = 6.8W (read/write)
- monitor Acer x193w = 37W
- other stuff: basic mouse + basic keyboard + case (Sharkoon S25-w with 2 fans) = I guess just a couple of Ws
TOTAL = 111.8W for sure + mobo + other stuff = I guess it's all under 200W at max load.
Now I need a UPS but my budget isn't high enough to get the best (eg. an online UPS) so I'd like to buy a UPS with the best quality/price relationship for my goals and my PC. I don't want to spend more than 200$.
AFAIK I need a UPS that generates a pure sine wave during a blackout because of my PSU's active PFC, else please correct me.
My goal is just to preserve my PC's health from surges, brownouts and blackouts. My worst scenario is when it's raining hard because blackouts occurs randomly and sometimes quite close one to the next one, definitely I need a UPS that lets me shut my pc off correctly for 2 times (blackouts) in a row close 30 minutes the 1st one to the 2nd one.
My milestone is
cyberpower cp900epfclcd,
here you can get its specs, eg.: VA 900 - Watts 540 (Output Power Factor 0.60) - Line-interactive UPS Topology - Active PFC Compatible - Pure Sine Wave Output, Automatic Voltage Regulation (AVR). Its current price is 200 euros (equal to 200$).
Consider I live in Italy so I can't buy, eg.,
cyberpower CP850PFCLCD because it's not available here nor
APC BR1000MS which generates pure sine wave as well.
Finally I'd want to tell you a problem of this PC because I guess it can be related to the UPS.
I've been using a very cheap (but loaned) 800VA UPS, so bad that its datasheet didn't say what kind of output wave it generated. Almost every time a blackout occurred and this UPS supplied my PC, it happened that my PC didn't boot: I switched it on but I got only a black screen. The only solution I found was to open the case and disconnect my hdd sata plugs, then it switched on. Of course I had to switch it off directly by the power off button, than connect the hdd plugs back again and then it booted.
My guess is that cheap UPS was the culprit so I think I need a pure sine wave UPS to supply my Corsair and avoid this problem. What do you think about that?