Cold boot when wake up from standby

[ahfung]

My desktop system was working flawlessly until lately it starts to have sleep problem. When waking up it just cold boot (and windows report not shutdown properly), I can see the power LED went off then relight as the power come back. Apparently short sleep (less than 15 or 30min) is still fine, but overnight is 90% cold boot. Apart from that my system is running perfectly fine.

What could be the cause, motherboard or PSU? I probably lack soldering skill to fix it myself, so will just buy a replacement. Thanks for reading my post.

Here is my system configuration:

Windows 7 SP1 64-bit
Intel i5-3570K
MSI Z77A-GD65
Team Elite 1600 4GB x 4
MSI GTX670
Enermax EG565 FMAII

[domas]

Re: Cold boot when wake up from standby

does it wake up if you hibernate it?

[Kiriakos GR]

Re: Cold boot when wake up from standby

Start by the basic things, inspect your wall plugs and mains cables and also those mains plugs PC cables.

[kc8adu]

Re: Cold boot when wake up from standby

disable the sleep/standby and see if it turns off in the night again.
some systems i have owned were nothing but trouble using the power save stuff.

[ahfung]

Re: Cold boot when wake up from standby

kc8adu & Kiriakos GR:

For almost a year it used to sleep overnight and woke up by button in the morning flawlessly until one day... Wake up from long sleep will then cause cold boot and possibly data loss. Just to clarify, the system is stable enough to run 24x7 without power saving, so the wall plug/cables should be alright.

domas:

As far as I understand, hibernation is S5 state, which is electronically equivalent to S0/shutdown. But I can give it a try... (my SSD will hate it though)

[TELVM]

Re: Cold boot when wake up from standby

Do not hibernate on a SSD, there is no need and you'll just heavily chastise the SSD from 16GB of RAM.

Have a look here this may solve your problem: http://www.tomshardware.co.uk/forum/...sleep#10459383

[domas]

Re: Cold boot when wake up from standby

mine is set to sleep on battery after some time.. It hibernates when the battery is like 7% iirc. In power it can run 24/7 though.

Ah damn, never knew the ssd issue while hibernating.. Well I run SSD for c drive an use hibernation when i need that. I mean, there is really no other way to save running programs. I have to use it and well.. SSD has to handle it. While normally it is using no more than 3-4gb ram our of 8, it does not stress ssd too effin' much. Or does it write the whole 8GB of data to ssd anyway?

ahfung: i am asking this as this might as well be software issue, if it is hibernating after some time. And doing it without success. Just do a manual test of hibernation, just once to make sure it is not the problem

[Kiriakos GR]

Re: Cold boot when wake up from standby

the system is stable enough to run 24x7 without power saving, so the wall plug/cables should be alright.

My diagnosis which is made from the other side of this planet, is that your PSU it could have issues with the +5Vsb rail.

Only if you have the way to test another PSU on your system you will be capable to confirm that.

[ahfung]

Re: Cold boot when wake up from standby

Hey guys just come back to say thank you!
Swapped with a more uptodate PSU (Antec truepower 550W), my sleep problem goes away. It is more quiet too, that old Enermax can now decommissioned.

Hibernation and SSD health doesn't mix well. Many years ago when I still use HDD, the hibernation file had a size equal to system memory. Laptop on battery could sleep then hibernate multiple times a day, I'd say never do that with SSD. Laptop should consume way lower standby power than modern ATX PSU which now required by EU regulation to use less than 1W phantom power (Google one-watt initiative). I'd say sleep and SSD are the best of both world now, green and speedy.

[TELVM]

Re: Cold boot when wake up from standby

Hey guys just come back to say thank you!
Swapped with a more uptodate PSU (Antec truepower 550W), my sleep problem goes away ...

Glad you solved it, looks like Kiriakos was right and +5VSB wasn't OK.

Hibernation and SSD health doesn't mix well ... ... I'd say sleep and SSD are the best of both world now, green and speedy.

Agreed. I also have a comp with 16GB of RAM and it draws ~4W in S3 Suspend To RAM state (measured with kill-a-watt). Then comes back to life almost instantly in about two seconds.

[ahfung]

Re: Cold boot when wake up from standby

Glad you solved it, looks like Kiriakos was right and +5VSB wasn't OK.



Agreed. I also have a comp with 16GB of RAM and it draws ~4W in S3 Suspend To RAM state (measured with kill-a-watt). Then comes back to life almost instantly in about two seconds.

Look for EuP2013 and enable it in bios (if you mb support), it should cut standby wattage to around 1W to comply with EU regulation. You may need to check if your PSU is compliant though. My setup (with the Enermax) drew about 1.4W on standby measured with kill-a-watt. You can probably cut the wattage further by only enabling necessary wake up options (i.e. WOL and power button).