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Thread: S3 vs. S4

  1. #1
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    S3 vs. S4

    What is the real difference in power consumption on these two modes? I have my MCE box at home running in S3 and it completely shuts down and starts up within 5-10 seconds. Will this mode work with a CarPC without draining the battery in the process?

    Thanks
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  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    It all depends on teh PC hardware.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  3. #3
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    Quote Originally Posted by DarquePervert View Post
    It all depends on teh PC hardware.
    Like what? Will some chips stay running during S3 while others won't?
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  4. #4
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    My computer in the car stays on pernamently, when the key is turned off the computer goes to s3 standby, drawing about 150mA. originally i had the power disconnect from the laptop, and it then run from the internal battery while on standby, lasting about 50 hours. but now i just have the laptop power supply turned on pernamently to the car battery because 150ma is nothing for the car battery.

  5. #5
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    I've been too afraid to try it - don't want my battery to die. Maybe I will try it now...hmm

    Edit: Well, I guess I forgot about all the features on my M2-ATX, it will shut it down completely if the battery level is too low, so I guess I'll give this a shot
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  6. #6
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    Ok, maybe I'm missing something, but I can't get my car pc to go into S3, just S4. My BIOS is set to S3 and I did the reg fix for USB in Windows, so I don't know what else I have to do. I have a VIA M10000 mboard...
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  7. #7
    FLAC strohj's Avatar
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    are you picking standby when you "shutdown" windows?
    Pentium 4m 1.5GHz|MB896|Roadie Extreme|XM-Direct|Rikaline 6010|T-View 7"|Streetdeck|160gb Western Digital|1Gb DDR2-533 Ram

  8. #8
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    I was reading other people's experiences on Annoyances.org and it hit me that I have mine forcing hibernation in Windows - DUH! I am going to try unchecking hibernation and make sure that Windows is set for standby on power off. I remember doing this before and it not working though, I maybe have to make sure my USB devices aren't enabled for wake...

    Thanks
    Carputer Progress:

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  9. #9
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    I'm not sure how accurate these tests are, but this guy says that S3 takes just as much power as when the computer is shut off.

    http://www.yafla.com/dennisforbes/On...umppo-exe.html
    Carputer Progress:

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