My EP35-DS3R is suffering from the infamous double-boot problem. It reverts to stock settings after every cold boot if I OC higher than ~3.4GHz. It's 100% stable in Windows at 3.8GHz, tested with games, prime95, video, multitasking, etc. If I reboot it maintains the OC, but if I shut the power down it will double-boot.
What I tried so far:
Lots of different voltage settings. It's stable in Windows, so I don't think that's the problem.
Auto and manual RAM timing. Apparently didn't make any difference. Even with the ram underclocked (375x9.5 instead of 400x9) it still double-boots.
Flashed to BIOS F3e. That locked my CPU voltage to stock and I couldn't change it at all.
Flashed back to F2, could change voltages again, but still get double boots.
Cleared CMOS (removed battery, power, etc) numerous times already.
Disabled legacy USB support and halt on errors. Made no difference.
Disabled C1E, EIST, etc.-- again it made no difference. They actually work fine in Windows at 3.8GHz so I turned them back on, no BSODs.
So has anyone ever solved this kind of thing on their board or have any ideas what to try next?
What I tried so far:
Lots of different voltage settings. It's stable in Windows, so I don't think that's the problem.
Auto and manual RAM timing. Apparently didn't make any difference. Even with the ram underclocked (375x9.5 instead of 400x9) it still double-boots.
Flashed to BIOS F3e. That locked my CPU voltage to stock and I couldn't change it at all.
Flashed back to F2, could change voltages again, but still get double boots.
Cleared CMOS (removed battery, power, etc) numerous times already.
Disabled legacy USB support and halt on errors. Made no difference.
Disabled C1E, EIST, etc.-- again it made no difference. They actually work fine in Windows at 3.8GHz so I turned them back on, no BSODs.
So has anyone ever solved this kind of thing on their board or have any ideas what to try next?