Here's the settings that resolved my s3 sleep reboot loop issue

[ispete]

Just want to post these settings that fixed my s3 sleep problem. Maybe they will be helpful to someone else with the issue.

In my case, I would get a reboot loop after sleep if my FSB was set to 400 or above. It seems that sleep started working when I adjusted the MCH Reference voltage, but I'm not positive on this. Also, I haven't re-tested for full stability. This overclock was stable before, I just had the s3 problem.

BIOS

cpu clock ratio: 8X
cpu frequency : 3.20GHz
cpu host freq. : 400MHz
PCI Express : 100
CIA2 : Disabled

DRAM

Performance Enhance: Standard
Extreme Mem. Prof. : Disabled

MCH Freq: auto
System Memory Multi: 2.00D

cas: 5
tRCD: 5
tRD: 5
tRAS: 15

Load line calibration: Disabled
CPU Vcore: 1.375 (actual voltage is 1.33v)
CPU Term: 1.22
CPU PLL : 1.5
CPU Ref : 0.812
MCH core: 1.2
MCH Ref : 0.812

MCH/DRAM ref: Normal

ICH I/O : 1.5
ICH Core: 1.1
DRAM volt: 2.12
Dram Term: Normal
A ref : Normal
B ref : Normal

[BuGjAE]

Re: Here's the settings that resolved my s3 sleep reboot loop issue

I follow up your setting on EP45-UD3R since i got random time reboot loop.
Look forward how it's going on.
Thanks for share a setting.

[Lsdmeasap]

Re: Here's the settings that resolved my s3 sleep reboot loop issue

Thanks for sharing! Now, when you get time you should find out exactly what manual MCH ref voltage you need for stability.

You may be able to look in easytune and see what Normal is using, but not sure - it might just say 0.76.

If it does say that, go into the BIOS and set 1.20 Vtt manually, then 0.76 MCH ref manually, then raise Vtt back to the 1.22 you were using (MCH Ref will auto adjust when you do this) and see if that gets it sorted for you!

[BuGjAE]

Re: Here's the settings that resolved my s3 sleep reboot loop issue

Seem it's work very well for me after I set

Performance Enhance: Standard
Extreme Mem. Prof. : Disabled

another value i left it the same manual adjust for OCing my system

No reboot loop after s3 sleep until now.

THANKS !!