S3 sleep state: 12w. Isn't it too much?

flapane · Post by **flapane** » Sun Mar 07, 2010 5:02 am

Win 7 x64.
When the computer is put into sleep state, I mesaured the power draw at wall, an it turned out to be 12w.
Is it a normal value? I tought the ram was the only component to draw energy, and two sticks of ddr800 don't draw 12w.

Ksanderash · Post by **Ksanderash** » Sun Mar 07, 2010 11:19 am

How about hibernate (S4)? Have you tried to measure under it?

flapane · Post by **flapane** » Sun Mar 07, 2010 12:06 pm

Unfortunately I didn't (and I can't because my friend took the power meter away for a while), but of course it must be around 2-3w, because everything is saved on HDD and then the computer is shut down.

nutball · Post by **nutball** » Sun Mar 07, 2010 12:09 pm

flapane wrote:but of course it must be around 2-3w, because everything is saved on HDD and then the computer is shut down.

Not necessarily. Even in S4 and S5 the PSU still draws power. One of my PCs draws 14W when shut down (S5), it draws the same when in S3.

flapane · Post by **flapane** » Sun Mar 07, 2010 12:11 pm

It is behind and UPS, and when it is completely shut down, it draws exactly 0.
Note that switching from a lc-power 550w to a 82plus be-quiet didn't change the S3 power draw.

Wibla · Post by **Wibla** » Sun Mar 07, 2010 12:55 pm

My computers draw about 8-11W when turned off, this with intel chipset/cpu, corsair psus... so i flip the switch on the pcs i keep turned off most of the time

xan_user · Post by **xan_user** » Sun Mar 07, 2010 6:02 pm

flapane wrote:Win 7 x64.
When the computer is put into sleep state, I mesaured the power draw at wall, an it turned out to be 12w.
Is it a normal value? I tought the ram was the only component to draw energy, and two sticks of ddr800 don't draw 12w.

how do you wake your PC up? keyboards and mice take power to be ready for wake command. bios also need some juice in sleep, as i think its only kept on battery when off. plus network wake settings would effect sleep power use.

flapane · Post by **flapane** » Mon Mar 08, 2010 3:27 am

Mmmh that sounds interesting.
I wake it up by pressing a key on the keyboard.
I will tell you if W-O-L and other features are enabled in the BIOS.

Post by **NeilBlanchard** » Mon Mar 08, 2010 4:47 am

Even the regular power switch is electronic; and all computers draw some power when turned off. If you use the switch on the back of the PSU, then that would zero it out.

flapane · Post by **flapane** » Mon Mar 08, 2010 7:19 am

That's why I use an ups.
However I was interested in knowing the power draw in S3 state for other users, because imho 12w are too much.

xan_user · Post by **xan_user** » Mon Mar 08, 2010 7:43 am

flapane wrote: However I was interested in knowing the power draw in S3 state for other users, because imho 12w are too much.

sorry no kill a watt here...maybe other can chime in tho.

different hardware will have different S3 power consumptions. mobo, psu,ram,fsb, usb device, lan cards ect all factor in . I suspect even different GPUs make a difference. then there's temperature and humidity to consider, and also the age of the mobo and psu capacitors too.

flapane · Post by **flapane** » Mon Mar 08, 2010 9:00 am

PSU is 1 month old and mobo is 1 year old.

I have just checked in P5QLPRO bios and there is nothing but S1-S3-auto option, and nothing to disable or enable wake-on-lan and such things.
Seems like I can't do much.

idale · Post by **idale** » Mon Mar 08, 2010 9:37 am

flapane wrote:That's why I use an ups.
However I was interested in knowing the power draw in S3 state for other users, because imho 12w are too much.

I'd have to check my notes at home to be sure, but I usually see around 7W in sleep (S3). "Off" is usually something like 1-2W as I recall.

lm · Post by lm » Mon Mar 08, 2010 9:59 am

My display in soft off, pc in soft off and UPS powered on draw 30W from the wall! That's just too much.

How do I make it so that with the flip of one switch, the UPS, display and PC are powered on and boot the operating system, then at the flip of the same switch the devices are powered down to exactly 0W? Prefererably the switch would even halt the OS gracefully first. Anyone?

xan_user · Post by **xan_user** » Mon Mar 08, 2010 10:04 am

are lan activity lights on during s3? but lan I think is only ~500mW (but every little mW adds up to even more at the socket.)

does the mobo have usb/ps2 power setting jumpers?

if you unplug all usb and lan and other non necessary cables, including any extra HDD's, and multiple monitors if any, does s3 power consumption go down much?

out of curiosity with the PC turned off, but with PSU switch on, how much watts are being used at the wall, before ups when compared to after the ups?

flapane · Post by **flapane** » Mon Mar 08, 2010 10:05 am

me or lm?

xan_user · Post by **xan_user** » Mon Mar 08, 2010 10:12 am

flapane wrote:me or lm?

you.

Im should start a new thread for that question.

flapane · Post by **flapane** » Mon Mar 08, 2010 10:17 am

Sad to say, but my friend took the power meter away for a while, I'm really curious to do the test you suggested

I checked my manual and I have two jumpers:
3pin PS2_USBPW56
keyboard power
+5VSB default

USB device wakeup (3pin USBPW)
+5VSB default for USB 1 to 4
+5V for USB 5 to 11

Vetotat · Post by **Vetotat** » Mon Mar 08, 2010 11:12 am

flapane wrote:I was interested in knowing the power draw in S3 state for other users

6W in sleep
4W in hibernate/standby

E8400 + HD4850 + HX520 + P5Q-E

flapane · Post by **flapane** » Mon Mar 08, 2010 11:24 am

Thanks, that sounds more reasonable.

howardyu · Post by **howardyu** » Tue Mar 09, 2010 12:20 pm

UPS takes about 4W to 10W
PS takes takes about 3W with S5 (same with S4) and 4W with S3. My system (i5-860) uses 8W with S4 or S5 and 9W with S3.

flapane · Post by **flapane** » Tue Mar 09, 2010 12:59 pm

That could explain my 12w value... UPS+a bios that doesn't let me manually disable wake-on-lan and other features. What a pity...

thanks!

andymcca · Post by **andymcca** » Tue Mar 09, 2010 1:25 pm

My desktop uses <5W in S3. 12W does seem really high. As others mentioned, could be motherboard peripherals? Could also be poor mobo design. Have you tried it without the UPS to rule that out? It shouldn't use much if not charging.

flapane · Post by **flapane** » Tue Mar 09, 2010 1:26 pm

Yes I need to do all these tests whenever I'll have my wattmeter.

smilingcrow · Post by **smilingcrow** » Tue Mar 09, 2010 3:35 pm

Most systems I have tested consume around 3 to 4W on Standby (S3 or STR) and about 1W less when powered off; with the power supply switch still on and the socket still powered.

S3 sleep state: 12w. Isn't it too much?

S3 sleep state: 12w. Isn't it too much?

Re: S3 sleep state: 12w. Isn't it too much?