Unless you have a WHOLE LOT of graphics cards, your power usage is no where near 850W. You may have an 850W power supply, but you probably don't use 1/2 the capacity.
How did you determine that? Did you measure the usage? That is the most accurate way.
BUT, if you believe you will have a 750W usage, then you need a 1200W or 1500W UPS.
How did you determine that? Did you measure the usage? That is the most accurate way.
BUT, if you believe you will have a 750W usage, then you need a 1200W or 1500W UPS.
It is possible but highly unlikely, PCPartpicker says my rig uses 612w and thats with two of the most power hungry 290x's on the market in it. Chances are your rig uses 300w-450w max unless you're running older AMD hardware.