Thread: Optimal Boot Speed Hibination Suspend modes.

Depending on your Setup, i have been experimenting with S3 Standby, thats where there is always power to the RAM, its takes 3 secs to get back to my music playing but my car does not shut power off to the usb at this time, so im going to go with Hibernate which writes memory to the HDD and then powers off completly.

Neil

Hibernation requires no power whatsoever to maintain that state.
Standby (suspend to RAM) does require power to maintain that state.

In my opinion, hibernation is the way to go. It's substantially faster than a cold boot and doesn't require any power.

Originally Posted by BrentMcGhee

with the small amount of voltage that it takes to keep the information in ram during a suspend mode, how long do you think it would take to kill your battery with that. I would really like being able to just suspend my computer instead of hibernating it but i also do not want to kill my battery.

It's not the voltage that matters...it's the current. If you want to know, then:

1) Get a voltmeter that measures DC current...I got one for ~$15 at AutoZone that measures up to 10A

2) Wire the meter leads inline with your power supply's standby connection to the motherboard. If you search for and read the ATX powersupply specs, you can find which pin on the connector supplies power for the Standby state. Measuring the current draw would then just be a matter of wiring the meter leads in series with the standby lead and reading the meter while the computer is in standby mode.

3) Figure out how many Amp-hours your battery is rated at, and compare with the current draw you measured. For example, if you determined that the computer draws 0.010 amps when in standby, and your battery is rated at 1 amp hours, then your battery would last approximately 100 hours.

Originally Posted by parksgm

It's not the voltage that matters...it's the current. If you want to know, then:

1) Get a voltmeter that measures DC current...I got one for ~$15 at AutoZone that measures up to 10A

2) Wire the meter leads inline with your power supply's standby connection to the motherboard. If you search for and read the ATX powersupply specs, you can find which pin on the connector supplies power for the Standby state. Measuring the current draw would then just be a matter of wiring the meter leads in series with the standby lead and reading the meter while the computer is in standby mode.

3) Figure out how many Amp-hours your battery is rated at, and compare with the current draw you measured. For example, if you determined that the computer draws 0.010 amps when in standby, and your battery is rated at 1 amp hours, then your battery would last approximately 100 hours.

Just need to clarify, that you do NOT need to put the meter between the PS and the MB as you suggest. You can put it in series between the battery and the PS power wires. This will tell you how much total power the PS is using when in suspend.

Also, it is VERY difficult to tell you how long, even after knowing the amperage draw in suspend. The resson being that it is almost impossible to know at what amperage/voltage level you will be unable to start your car. You can get an APPROXIMATION at best.

Michael

Originally Posted by Wiredwrx

Just need to clarify, that you do NOT need to put the meter between the PS and the MB as you suggest. You can put it in series between the battery and the PS power wires. This will tell you how much total power the PS is using when in suspend.

Also, it is VERY difficult to tell you how long, even after knowing the amperage draw in suspend. The resson being that it is almost impossible to know at what amperage/voltage level you will be unable to start your car. You can get an APPROXIMATION at best.

Michael

Yep, that will work very well, assuming that you have a meter that is capable of handling the current. Most meters that I have seen max out at around 10A DC...I was suggesting a way to bypass this limitation with a lower amperage meter.

...and you're right, it will be an approximation at best. I would guess that some trial discharges would be in order before venturing too far from home.