is 11.59 cents per kWh, so sleep mode costs you 22.2 cents per month. According to the Department of Energy, the average price for electricity in the U.S. That 4W difference works out to a whopping 1.92 killowatt-hours (kWh) per month. My computer is running a lot more than the average person’s, so let’s just suppose your system is turned off 16 hours a day. What does that different of 4 watts mean to you? In sleep mode, my system draws a whopping 5 watts. My high-end system uses some 120-130 watts just sitting at the desktop (not including monitor), and uses 1 watt when powered off (most computers draw a very small amount of power, even when off, so they can do things like turn on when you press the power button). Our article from a couple years ago on how to check and change your BIOS sleep state is still relevant. The S1 mode leaves the CPU and RAM powered up, the S3 mode powers those down. Not to mention that I can wake up my PC by tapping the keyboard, instead of reaching down to press a small power button.īut what about power, you ask? Am I running up my power bill? As long as your system BIOS supports the S3 ACPI (Advanced Configuration and Power Interface) mode, no.
Shutting down takes a couple seconds longer, but waking my computer up is almost instantaneous. That’s right two seconds to get to a truly usable desktop waking from sleep mode.
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