Hi All,
Recently built a new system with an E8400 and a Gigabyte ep35c-ds3r mobo.
I have an otherwise stable overclock at 3.6ghz (FSB 400 x 9), but my problem is that when the system is overclocked by ANY AMOUNT, sleep mode will not work properly.
When OCed, even by 1mhz FSB, placing the system in sleep mode results in the system going to sleep as expected. When I try to wake the system, instead of waking up, the power cycles on and off every 5 seconds until I hold down the power button for a hard boot down. The system will not come out of this "power cycling" unless I give it the hard boot down. Often times, after re-booting, windows will launch "resuming windows," and will resume ok.
This problem does not occur when the system is running at stock frequencies (3.0Ghz, 333FSB x 9). I put the system to sleep, and can wake it immediately with mouse/keyboard.
I usually leave the voltages set to auto, but I have tried bumping the voltages up a bit manually and the sleep mode issue remains, though I am not ruling out a voltage problem.
Any ideas? I have a revision 2.1 of the board and have tried the F2 and F3b bios. Running Vista Ultimate 32-bit, with 4GB OCZ Platinum 5-4-4-12 @ 800mhz. Video= XFX GeForce 8600 GS.
Thanks for any help. Don't want to RMA the board, but I can not figure this out and losing sleep mode functionality is a bit of a deal breaker me.
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ep35c ds3r e8400 sleep mode working ideas