Thanks everyone for input.
I realized that my APC UPS shows the power usage status. When idle, it seems the PC is using only about 100 to 130 W. Need to test it under heavy load but it seems it should be well below 305W of PSU. Or is there a big headroom I should reserve for because power rating of PSU is highly inflated a la contrast ratios of LCD display or wattage ratings of audio power amplifier?
To go with two identical card means I have to ditch the current ATI X600 card which sits on the lone PCIE-16x slot and buy two new cards for slow PCI slots I have. I am not sure I want to go that route at this point yet. I will keep that in mind though.
I realized that my APC UPS shows the power usage status. When idle, it seems the PC is using only about 100 to 130 W. Need to test it under heavy load but it seems it should be well below 305W of PSU. Or is there a big headroom I should reserve for because power rating of PSU is highly inflated a la contrast ratios of LCD display or wattage ratings of audio power amplifier?
To go with two identical card means I have to ditch the current ATI X600 card which sits on the lone PCIE-16x slot and buy two new cards for slow PCI slots I have. I am not sure I want to go that route at this point yet. I will keep that in mind though.