I dont need a powerful UPS for the longer time backup. I need solution, which would not shut down the PC, during a power failure. Right now, when a render is going on and power fails, the PC immediately shuts down. So, I need to know, what to do, so I can avoid shut down.
Usually there would be a software that you could download/install from the UPS maker, and that would control how long the PC would stay on after the power failure. But ultimately, it would depend on the UPS battery.
The way to check the operation of the UPS is to disconnect all outputs from the UPS and disconnect the UPS from the mains electric supply. Plug an incandescent lamp of high wattage ( 60W or even 100W ) into the output on the UPS that the computer was plugged into and turn the lamp ON. If the lamp lights then we have proven that the battery of the UPS is charged and supplying to the output receptacle. If the lamp does not light then we know that either the battery of the UPS is dead or that the UPS circuitry connected to the output is faulty. The UPS may be defective in that it is supplying to your computer when the mains electric is available but: 1) not charging the battery or 2) not supplying from the battery when the mains electric is OFF. The above test may help us isolate the problem.
The computer doesnt shut down, when normal usage is done. But when the render is happening, it shuts down. That means, the render time, it uses more power, which the UPS is not able to supply. Right ?
Yes, it would appear that to much power is being used when rendering, if battery supply is available for what would be normal power failure conditions. If the amperage draw is to high the UPS may have an overload shutoff (as a safety feature) when on battery supply. As identified in previous posts a standard UPS is only meant to allow for a quick controlled shutdown when the power fails although some people are able to use them for extended lengths of time. A 800VA UPS is meant to supply 500W (full load) for about 5 minutes. You need to get an amperage reading into the computer when rendering and match that amperage to a UPS that can supply that current output for an extended time to prevent an overload situation. Sorry that I am unable to give you a solution to the problem.
A surge protector is not required as the UPS functions as one between your computer and the mains electric. When the mains electric fails and the UPS switches to battery, it appears as if the initial current draw from the battery is too high and the UPS shuts down abruptly on overload. An overload shutdown usually happens within cycles of detection ( within tenths of a second). The current draw of the video card when rendering the videos may be close to the UPS overload condition and not sensed when the backup system is being supplied from the mains. Upgrading to a 1500VA UPS will not solve the problem if the overload setting is a similar value to what the 800VA UPS uses.
Usually a UPS shutting down due to overload will clearly indicate that. At least the APCs will flash the red light and sound an alert.
Ohhh!! Ao, what exactly to do ? If UPS cannot help, what else can ? How to save the PC from shutting down during the render ?
Beep(s) are a form of alarm (as in a computer POST). What does the UPS user manual say about beep(s)? The most accurate way to determine current is to use a Clamp-on Amp meter (Fluke style) or place an in-line amp meter in the circuit. If in doubt, contact an electrical technician.