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Needed UPS wattage for a system

Tags:
  • Components
  • Graphics Cards
  • Power
  • Corsair
Last response: in Components
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October 16, 2014 4:03:45 AM

Main question:

I have a 1000 VA UPS, which must be 600 Watt. My new PSU is CORSAIR CX750 - 80 PLUS BRONZE. My graphics card is ATI Radeon HD 5850, my processor is an intel i7. I connect to the UPS my pc along with my monitor which is 22 inches and the specification say "Power Consumption Operational: 45 Watt".

My UPS is this.

Will everything run ok without any problems?


Additional questions:

1) As long as my home power is ok, what does the UPS exactly do? I mean, I do not need it's battery unless the home power goes off, so as long as the home power is ok, does the UPS limit the wattage needed by the pc?

2) My old PSU, which was "thermaltake qfan toughpower 750w", was connected exactly as I described and after 4,5 years it kinda went dead so I am searching for possible reasons. The first thing that struck my mind is that the UPS was causing problems since it is only 600 watt, but I dont know if it has anything to do. I do not want my new PSU to die.

More about : needed ups wattage system

a b U Graphics card
October 16, 2014 4:09:08 AM

hardware2 said:
Main question:

I have a 1000 VA UPS, which must be 600 Watt. My new PSU is CORSAIR CX750 - 80 PLUS BRONZE. My graphics card is ATI Radeon HD 5850, my processor is an intel i7. I connect to the UPS my pc along with my monitor which is 22 inches and the specification say "Power Consumption Operational: 45 Watt".

My UPS is this.

Will everything run ok without any problems?


Additional questions:

1) As long as my home power is ok, what does the UPS exactly do? I mean, I do not need it's battery unless the home power goes off, so as long as the home power is ok, does the UPS limit the wattage needed by the pc?

2) My old PSU, which was "thermaltake qfan toughpower 750w", was connected exactly as I described and after 4,5 years it kinda went dead so I am searching for possible reasons. The first thing that struck my mind is that the UPS was causing problems since it is only 600 watt, but I dont know if it has anything to do. I do not want my new PSU to die.


You are fine, since your PSU died after 4,5 years that means it died of old age. Though that CX is a worse PSU than your old Toughpower and will have a shorter life span, but let's hope it gets you by for 3-4 years.

http://en.m.wikipedia.org/wiki/Uninterruptible_power_su...

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries, supercapacitors, or flywheels. The on-battery runtime of most uninterruptible power sources is relatively short (only a few minutes) but sufficient to start a standby power source or properly shut down the protected equipment.

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October 16, 2014 4:23:34 AM

The main thing I see missing from that UPS is any way to signal the computer to shutdown when the batteries are almost empty. There isn't a USB port that allows automatic clean shutdown of the PC before the battery goes dead. So if you have a short power outage you are OK. If you have a longer outage, you still have to manually shutdown the PC. A higher end UPS would have a USB port to connect to the PC to allow software to automatically do so.
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October 16, 2014 4:41:43 AM

So no problem rises from the fact that my UPS wattage is lower than my PSU?
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October 16, 2014 5:28:11 AM

hardware2 said:
So no problem rises from the fact that my UPS wattage is lower than my PSU?


No. The PSU is a MAX power. Your system is much less than that. Since your UPS doesn't have a way to measure actual power draw to estimate your battery runtime, you might want to get power meter that will give you the actual power usage for your system. That will let you estimate runtime of the batteries.
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